fix: added missing dependency lodash

* admin user can see per-user coins data

* fixes

* fix

.github/workflows/docker-publish.yml

@@ -11,6 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     outputs:
       EXISTS: ${{ steps.check-version.outputs.EXISTS }}
+      VERSION: ${{ steps.package-version.outputs.VERSION }}
 
     steps:
       - name: Checkout code
@@ -51,13 +52,12 @@ jobs:
           push: true
           tags: |
             ${{ steps.check-version.outputs.EXISTS == 'false' && format('dohsimpson/habittrove:v{0}', steps.package-version.outputs.VERSION) || '' }}
-            ${{ steps.check-version.outputs.EXISTS == 'false' && 'dohsimpson/habittrove:latest' || '' }}
-            dohsimpson/habittrove:dev
+            dohsimpson/habittrove:demo
 
   deploy-demo:
     runs-on: ubuntu-latest
     needs: build-and-push
-    # demo tracks the latest tag
+    # demo tracks the demo tag
     if: needs.build-and-push.outputs.EXISTS == 'false'
     steps:
       - uses: actions/checkout@v4
@@ -66,3 +66,29 @@ jobs:
           KUBE_CONFIG: ${{ secrets.KUBE_CONFIG }}
         with:
           args: rollout restart -n ${{ secrets.KUBE_NAMESPACE }} deploy/${{ secrets.KUBE_DEPLOYMENT }}
+
+  create-release:
+    runs-on: ubuntu-latest
+    needs: build-and-push
+    if: needs.build-and-push.outputs.EXISTS == 'false'
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Create GitHub release
+        env:
+          GH_TOKEN: ${{ secrets.GH_TOKEN }}
+          VERSION: ${{ needs.build-and-push.outputs.VERSION }}
+        run: |
+          # Extract release notes from CHANGELOG.md
+          notes=$(awk -v version="$VERSION" '
+            $0 ~ "## Version " version {flag=1;next}
+            $0 ~ "## Version " && flag {exit}
+            flag' CHANGELOG.md)
+
+          gh release create "v$VERSION" \
+              --repo="$GITHUB_REPOSITORY" \
+              --title="v$VERSION" \
+              --notes="$notes"

.github/workflows/test.yml

@@ -21,5 +21,8 @@ jobs:
       - name: Install dependencies
         run: bun install
 
+      - name: Run lint
+        run: bun run lint
+
       - name: Run unit tests
         run: bun test

.gitignore

@@ -41,6 +41,8 @@ yarn-error.log*
 next-env.d.ts
 
 # customize
-data/*
+/data/*
+/data.*/*
 Budfile
 certificates
+/backups/*

.husky/pre-commit

@@ -1,7 +1 @@
-if git diff --cached --name-only --diff-filter=d | xargs grep -n '🪚'; then
-  echo "Error: Found debug marker 🪚 in these files:"
-  git diff --cached --name-only --diff-filter=d | xargs grep -n '🪚' | awk -F: '{print "  " $1 ":" $2}'
-  exit 1
-fi
-
-npm run typecheck && npm run test
+npm run typecheck && npm run lint && npm run test

CHANGELOG.md

@@ -1,5 +1,188 @@
 # Changelog
 
+## Version 0.2.11
+
+### Added
+
+* support searching and sorting in habit list
+
+### Improved
+
+* Show overdue tasks in daily overview
+* Context menu option for tasks changed from "Move to Today" to "Move to Tomorrow"
+* More context menu items in daily overview
+* code refactor for context menu and daily overview item section
+
+
+## Version 0.2.10
+
+### Improved
+
+* performance optimization: faster load time for large data set
+
+## Version 0.2.9
+
+### Added
+
+* Auto backup feature: Automatically backs up data
+* Backup rotation: Keeps the last 7 daily backups
+* Setting to enable/disable auto backup.
+
+## Version 0.2.8
+
+### Added
+
+* notification for admin users on shared habit / wishlist completion (#92)
+
+## Version 0.2.7
+
+### Added
+
+* visual pin indicators for pinned habits/tasks
+* pin/unpin options in context menus
+* support click and right-click context menu in dailyoverview
+
+## Version 0.2.6
+
+### Added
+
+* support weekly / monthly intervals for recurring frequency (#99)
+* show error when frequency is unsupported (#56)
+* add task / habit button in habit view
+
+### Fixed
+
+* make user select modal scrollable
+
+## Version 0.2.5
+
+### Changed
+
+* bumped Nextjs version (cve-2025-29927)
+
+## Version 0.2.4
+
+### Added
+
+* admin can select user to view coins for that user
+
+### Fixed
+
+* fix disable password in demo instance (#74)
+
+## Version 0.2.3
+
+### Fixed
+
+* gracefully handle invalid rrule (#76)
+* fix long habit name overflow in daily (#75)
+* disable password in demo instance (#74)
+
+## Version 0.2.2
+
+### Changed
+
+* persist "show all" settings in browser (#72)
+
+### Fixed
+
+* nav bar spacing
+* completion count badge
+
+## Version 0.2.1
+
+### Changed
+
+* Added bottom padding for nav bar on iOS devices (#63)
+
+## Version 0.2.0
+
+### Added
+
+* Multi-user support with permissions system
+* Sharing habits and wishlist items with other users
+* show both tasks and habits in dashboard (#58)
+* show tasks in completion streak (#57)
+
+### BREAKING CHANGE
+
+* PLEASE BACK UP `data/` DIRECTORY BEFORE UPGRADE.
+* Requires AUTH_SECRET environment variable for user authentication. Generate a secure secret with: `openssl rand -base64 32`
+* Previous coin balance will be hidden. If this is undesirable, consider using manual adjustment to adjust coin balance after upgrade.
+
+## Version 0.1.30
+
+### Fixed
+
+- fix responsive layout on mobile for habits and wishlist when has archived items
+
+## Version 0.1.29
+
+### Fixed
+
+- actually working redeem link for wishlist items (#52)
+
+## Version 0.1.28
+
+### Added
+
+- redeem link for wishlist items (#52)
+- sound effect for habit / task completion (#53)
+
+### Fixed
+
+- fail habit create or edit if frequency is not set (#54)
+- archive task when completed (#50)
+
+## Version 0.1.27
+
+### Added
+
+- dark mode toggle (#48)
+- notification badge for tasks (#51)
+
+## Version 0.1.26
+
+### Added
+
+- archiving habits and wishlists (#44)
+- wishlist item now supports redeem count (#36)
+
+### Fixed
+
+- pomodoro skip should update label
+
+## Version 0.1.25
+
+### Added
+
+- added support for tasks (#41)
+
+## Version 0.1.24
+
+### Fixed
+
+- completed habits atom should not store partially completed habits (#46)
+
+## Version 0.1.23
+
+### Added
+
+- settings to adjust week start day for calendar (#45)
+
+## Version 0.1.22
+
+### Added
+
+- start pomodoro from habit view
+- complete past habit in calendar view (#32)
+
+## Version 0.1.21
+
+### Added
+
+- auto cut github release for new version
+
 ## Version 0.1.20
 
 ### Changed

Dockerfile

@@ -1,9 +1,9 @@
 # syntax=docker.io/docker/dockerfile:1
 
-FROM --platform=$BUILDPLATFORM node:18-alpine AS base
+FROM node:18-alpine AS base
 
 # Install dependencies only when needed
-FROM --platform=$BUILDPLATFORM base AS deps
+FROM base AS deps
 # Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
 RUN apk add --no-cache libc6-compat
 WORKDIR /app
@@ -19,7 +19,7 @@ RUN \
   fi
 
 # Rebuild the source code only when needed
-FROM --platform=$BUILDPLATFORM base AS builder
+FROM base AS builder
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
@@ -43,8 +43,9 @@ ENV NEXT_TELEMETRY_DISABLED=1
 RUN addgroup --system --gid 1001 nodejs
 RUN adduser --system --uid 1001 nextjs
 
-# Create data directory and set permissions
-RUN mkdir -p /app/data && chown nextjs:nodejs /app/data
+# Create data and backups directories and set permissions
+RUN mkdir -p /app/data /app/backups \
+    && chown nextjs:nodejs /app/data /app/backups
 
 COPY --from=builder /app/public ./public
 COPY --from=builder /app/CHANGELOG.md ./
@@ -61,6 +62,6 @@ EXPOSE 3000
 ENV PORT=3000
 ENV HOSTNAME="0.0.0.0"
 
-VOLUME ["/app/data"]
+VOLUME ["/app/data", "/app/backups"]
 
 CMD ["node", "server.js"]

README.md

@@ -6,7 +6,7 @@ HabitTrove is a gamified habit tracking application that helps you build and mai
 
 ## Try the Demo
 
-Want to try HabitTrove before installing? Visit the public [demo instance](https://habittrove.app.enting.org) to experience all features without any setup required. (do not store personal info. Data on the demo instance is reset daily)
+Want to try HabitTrove before installing? Visit the public [demo instance](https://demo.habittrove.com) to experience all features without any setup required. (do not store personal info. Data on the demo instance is reset daily)
 
 ## Features
 
@@ -15,8 +15,9 @@ Want to try HabitTrove before installing? Visit the public [demo instance](https
 - 💰 Create a wishlist of rewards to redeem with earned coins
 - 📊 View your habit completion streaks and statistics
 - 📅 Calendar heatmap to visualize your progress (WIP)
-- 🌙 Dark mode support (WIP)
-- 📲 Progressive Web App (PWA) support (Planned)
+- 🌙 Dark mode support
+- 📲 Progressive Web App (PWA) support
+- 💾 Automatic daily backups with rotation
 
 ## Usage
 
@@ -39,18 +40,30 @@ The easiest way to run HabitTrove is using our pre-built Docker images from Dock
 1. First, prepare the data directory with correct permissions:
 
 ```bash
-mkdir -p data
-chown -R 1001:1001 data  # Required for the nextjs user in container
+mkdir -p data backups
+chown -R 1001:1001 data backups # Required for the nextjs user in container
 ```
 
 2. Then run using either method:
 
 ```bash
+# Generate a secure authentication secret
+export AUTH_SECRET=$(openssl rand -base64 32)
+echo $AUTH_SECRET
+
 # Using docker-compose (recommended)
+## Update the AUTH_SECRET environment variable in docker-compose.yaml
+nano docker-compose.yaml
+## Start the container
 docker compose up -d
 
 # Or using docker run directly
-docker run -d -p 3000:3000 -v ./data:/app/data dohsimpson/habittrove
+docker run -d \
+  -p 3000:3000 \
+  -v ./data:/app/data \
+  -v ./backups:/app/backups \ # Add this line to map the backups directory
+  -e AUTH_SECRET=$AUTH_SECRET \
+  dohsimpson/habittrove
 ```
 
 Available image tags:
@@ -62,9 +75,11 @@ Available image tags:
 Choose your tag based on needs:
 
 - Use `latest` for general production use
-- Use version tags (e.g., `v0.1.4`) for reproducible deployments
+- Use version tags (e.g., `v0.2.9`) for reproducible deployments
 - Use `dev` for testing new features
 
+**Note on Volumes:** The application stores user data in `/app/data` and backups in `/app/backups` inside the container. The examples above map `./data` and `./backups` from your host machine to these container directories. Ensure these host directories exist and have the correct permissions (`chown -R 1001:1001 data backups`).
+
 ### Building Locally
 
 If you want to build the image locally (useful for development):

app/actions/data.ts

@@ -12,9 +12,44 @@ import {
   Settings,
   DataType,
   DATA_DEFAULTS,
-  getDefaultSettings
+  getDefaultSettings,
+  UserData,
+  getDefaultUsersData,
+  User,
+  getDefaultWishlistData,
+  getDefaultHabitsData,
+  getDefaultCoinsData,
+  Permission,
+  ServerSettings
 } from '@/lib/types'
-import { d2t, getNow } from '@/lib/utils';
+import { d2t, deepMerge, getNow, checkPermission, uuid } from '@/lib/utils';
+import { verifyPassword } from "@/lib/server-helpers";
+import { saltAndHashPassword } from "@/lib/server-helpers";
+import { signInSchema } from '@/lib/zod';
+import { auth } from '@/auth';
+import _ from 'lodash';
+import { getCurrentUser, getCurrentUserId } from '@/lib/server-helpers'
+
+import { PermissionError } from '@/lib/exceptions'
+
+type ResourceType = 'habit' | 'wishlist' | 'coins'
+type ActionType = 'write' | 'interact'
+
+
+async function verifyPermission(
+  resource: ResourceType,
+  action: ActionType
+): Promise<void> {
+  // const user = await getCurrentUser()
+
+  // if (!user) throw new PermissionError('User not authenticated')
+  // if (user.isAdmin) return // Admins bypass permission checks
+
+  // if (!checkPermission(user.permissions, resource, action)) {
+  //   throw new PermissionError(`User does not have ${action} permission for ${resource}`)
+  // }
+  return
+}
 
 function getDefaultData<T>(type: DataType): T {
   return DATA_DEFAULTS[type]() as T;
@@ -29,6 +64,27 @@ async function ensureDataDir() {
   }
 }
 
+// --- Backup Debug Action ---
+export async function triggerManualBackup(): Promise<{ success: boolean; message: string }> {
+  // Optional: Add extra permission check if needed for debug actions
+  // const user = await getCurrentUser();
+  // if (!user?.isAdmin) {
+  //   return { success: false, message: "Permission denied." };
+  // }
+
+  console.log("Manual backup trigger requested...");
+  try {
+    // Import runBackup locally to avoid potential circular dependencies if moved
+    const { runBackup } = await import('@/lib/backup');
+    await runBackup();
+    console.log("Manual backup trigger completed successfully.");
+    return { success: true, message: "Backup process completed successfully." };
+  } catch (error) {
+    console.error("Manual backup trigger failed:", error);
+    return { success: false, message: `Backup failed: ${error instanceof Error ? error.message : 'Unknown error'}` };
+  }
+}
+
 async function loadData<T>(type: DataType): Promise<T> {
   try {
     await ensureDataDir()
@@ -45,7 +101,7 @@ async function loadData<T>(type: DataType): Promise<T> {
 
     // File exists, read and return its contents
     const data = await fs.readFile(filePath, 'utf8')
-    const jsonData = JSON.parse(data)
+    const jsonData = JSON.parse(data) as T
     return jsonData
   } catch (error) {
     console.error(`Error loading ${type} data:`, error)
@@ -55,6 +111,9 @@ async function loadData<T>(type: DataType): Promise<T> {
 
 async function saveData<T>(type: DataType, data: T): Promise<void> {
   try {
+    const user = await getCurrentUser()
+    if (!user) throw new Error('User not authenticated')
+
     await ensureDataDir()
     const filePath = path.join(process.cwd(), 'data', `${type}.json`)
     const saveData = data
@@ -66,7 +125,14 @@ async function saveData<T>(type: DataType, data: T): Promise<void> {
 
 // Wishlist specific functions
 export async function loadWishlistData(): Promise<WishlistData> {
-  return loadData<WishlistData>('wishlist')
+  const user = await getCurrentUser()
+  if (!user) return getDefaultWishlistData()
+
+  const data = await loadData<WishlistData>('wishlist')
+  return {
+    ...data,
+    items: data.items.filter(x => user.isAdmin || x.userIds?.includes(user.id))
+  }
 }
 
 export async function loadWishlistItems(): Promise<WishlistItemType[]> {
@@ -74,48 +140,127 @@ export async function loadWishlistItems(): Promise<WishlistItemType[]> {
   return data.items
 }
 
-export async function saveWishlistItems(items: WishlistItemType[]): Promise<void> {
-  return saveData('wishlist', { items })
+export async function saveWishlistItems(data: WishlistData): Promise<void> {
+  await verifyPermission('wishlist', 'write')
+  const user = await getCurrentUser()
+
+  data.items = data.items.map(wishlist => ({
+    ...wishlist,
+    userIds: wishlist.userIds || (user ? [user.id] : undefined)
+  }))
+
+  if (!user?.isAdmin) {
+    const existingData = await loadData<WishlistData>('wishlist')
+    existingData.items = existingData.items.filter(x => user?.id && !x.userIds?.includes(user?.id))
+    data.items = [
+      ...existingData.items,
+      ...data.items
+    ]
+  }
+
+  return saveData('wishlist', data)
 }
 
 // Habits specific functions
 export async function loadHabitsData(): Promise<HabitsData> {
-  return loadData<HabitsData>('habits')
+  const user = await getCurrentUser()
+  if (!user) return getDefaultHabitsData()
+  const data = await loadData<HabitsData>('habits')
+  return {
+    ...data,
+    habits: data.habits.filter(x => user.isAdmin || x.userIds?.includes(user.id))
+  }
 }
 
 export async function saveHabitsData(data: HabitsData): Promise<void> {
-  return saveData('habits', data)
+  await verifyPermission('habit', 'write')
+
+  const user = await getCurrentUser()
+  // Create clone of input data
+  const newData = _.cloneDeep(data)
+
+  // Map habits with user IDs
+  newData.habits = newData.habits.map(habit => ({
+    ...habit,
+    userIds: habit.userIds || (user ? [user.id] : undefined)
+  }))
+
+  if (!user?.isAdmin) {
+    const existingData = await loadData<HabitsData>('habits')
+    const existingHabits = existingData.habits.filter(x => user?.id && !x.userIds?.includes(user?.id))
+    newData.habits = [
+      ...existingHabits,
+      ...newData.habits
+    ]
+  }
+
+  return saveData('habits', newData)
 }
 
+
 // Coins specific functions
 export async function loadCoinsData(): Promise<CoinsData> {
   try {
-    return await loadData<CoinsData>('coins')
+    const user = await getCurrentUser()
+    if (!user) return getDefaultCoinsData()
+    const data = await loadData<CoinsData>('coins')
+    return {
+      ...data,
+      transactions: user.isAdmin ? data.transactions : data.transactions.filter(x => x.userId === user.id)
+    }
   } catch {
-    return { balance: 0, transactions: [] }
+    return getDefaultCoinsData()
   }
 }
 
 export async function saveCoinsData(data: CoinsData): Promise<void> {
-  return saveData('coins', data)
+  const user = await getCurrentUser()
+
+  // Create clones of the data
+  const newData = _.cloneDeep(data)
+  newData.transactions = newData.transactions.map(transaction => ({
+    ...transaction,
+    userId: transaction.userId || user?.id
+  }))
+
+  if (!user?.isAdmin) {
+    const existingData = await loadData<CoinsData>('coins')
+    const existingTransactions = existingData.transactions.filter(x => user?.id && x.userId !== user.id)
+    newData.transactions = [
+      ...newData.transactions,
+      ...existingTransactions
+    ]
+  }
+  return saveData('coins', newData)
 }
 
-export async function addCoins(
-  amount: number,
-  description: string,
-  type: TransactionType = 'MANUAL_ADJUSTMENT',
-  relatedItemId?: string,
+export async function addCoins({
+  amount,
+  description,
+  type = 'MANUAL_ADJUSTMENT',
+  relatedItemId,
+  note,
+  userId,
+}: {
+  amount: number
+  description: string
+  type?: TransactionType
+  relatedItemId?: string
   note?: string
-): Promise<CoinsData> {
+  userId?: string
+}): Promise<CoinsData> {
+  await verifyPermission('coins', type === 'MANUAL_ADJUSTMENT' ? 'write' : 'interact')
+  const currentUser = await getCurrentUser()
   const data = await loadCoinsData()
   const newTransaction: CoinTransaction = {
-    id: crypto.randomUUID(),
+    id: uuid(),
     amount,
     type,
     description,
     timestamp: d2t({ dateTime: getNow({}) }),
     ...(relatedItemId && { relatedItemId }),
-    ...(note && note.trim() !== '' && { note })
+    ...(note && note.trim() !== '' && { note }),
+    userId: userId || currentUser?.id
   }
 
   const newData: CoinsData = {
@@ -131,6 +276,8 @@ export async function loadSettings(): Promise<Settings> {
   const defaultSettings = getDefaultSettings()
 
   try {
+    const user = await getCurrentUser()
+    if (!user) return defaultSettings
     const data = await loadData<Settings>('settings')
     return { ...defaultSettings, ...data }
   } catch {
@@ -142,22 +289,33 @@ export async function saveSettings(settings: Settings): Promise<void> {
   return saveData('settings', settings)
 }
 
-export async function removeCoins(
-  amount: number,
-  description: string,
-  type: TransactionType = 'MANUAL_ADJUSTMENT',
-  relatedItemId?: string,
+export async function removeCoins({
+  amount,
+  description,
+  type = 'MANUAL_ADJUSTMENT',
+  relatedItemId,
+  note,
+  userId,
+}: {
+  amount: number
+  description: string
+  type?: TransactionType
+  relatedItemId?: string
   note?: string
-): Promise<CoinsData> {
+  userId?: string
+}): Promise<CoinsData> {
+  await verifyPermission('coins', type === 'MANUAL_ADJUSTMENT' ? 'write' : 'interact')
+  const currentUser = await getCurrentUser()
   const data = await loadCoinsData()
   const newTransaction: CoinTransaction = {
-    id: crypto.randomUUID(),
+    id: uuid(),
     amount: -amount,
     type,
     description,
     timestamp: d2t({ dateTime: getNow({}) }),
     ...(relatedItemId && { relatedItemId }),
-    ...(note && note.trim() !== '' && { note })
+    ...(note && note.trim() !== '' && { note }),
+    userId: userId || currentUser?.id
   }
 
   const newData: CoinsData = {
@@ -169,10 +327,10 @@ export async function removeCoins(
   return newData
 }
 
-export async function uploadAvatar(formData: FormData) {
+export async function uploadAvatar(formData: FormData): Promise<string> {
   const file = formData.get('avatar') as File
   if (!file) throw new Error('No file provided')
-  
+
   if (file.size > 5 * 1024 * 1024) { // 5MB
     throw new Error('File size must be less than 5MB')
   }
@@ -190,18 +348,7 @@ export async function uploadAvatar(formData: FormData) {
   const buffer = await file.arrayBuffer()
   await fs.writeFile(filePath, Buffer.from(buffer))
 
-  // Update settings with new avatar path
-  const settings = await loadSettings()
-  const newSettings = {
-    ...settings,
-    profile: {
-      ...settings.profile,
-      avatarPath: `/data/avatars/${filename}`
-    }
-  }
-
-  await saveSettings(newSettings)
-  return newSettings;
+  return `/data/avatars/${filename}`
 }
 
 export async function getChangelog(): Promise<string> {
@@ -213,3 +360,179 @@ export async function getChangelog(): Promise<string> {
     return '# Changelog\n\nNo changelog available.'
   }
 }
+
+// user logic
+export async function loadUsersData(): Promise<UserData> {
+  try {
+    return await loadData<UserData>('auth')
+  } catch {
+    return getDefaultUsersData()
+  }
+}
+
+export async function saveUsersData(data: UserData): Promise<void> {
+  return saveData('auth', data)
+}
+
+export async function getUser(username: string, plainTextPassword?: string): Promise<User | null> {
+  const data = await loadUsersData()
+
+  const user = data.users.find(user => user.username === username)
+  if (!user) return null
+
+  // Verify the plaintext password against the stored salt:hash
+  const isValidPassword = verifyPassword(plainTextPassword, user.password)
+  if (!isValidPassword) return null
+
+  return user
+}
+
+export async function createUser(formData: FormData): Promise<User> {
+  const username = formData.get('username') as string;
+  let password = formData.get('password') as string | undefined;
+  const avatarPath = formData.get('avatarPath') as string;
+  const permissions = formData.get('permissions') ?
+    JSON.parse(formData.get('permissions') as string) as Permission[] :
+    undefined;
+
+  if (password === null) password = undefined
+  // Validate username and password against schema
+  await signInSchema.parseAsync({ username, password });
+
+  const data = await loadUsersData();
+
+  // Check if username already exists
+  if (data.users.some(user => user.username === username)) {
+    throw new Error('Username already exists');
+  }
+
+  const hashedPassword = password ? saltAndHashPassword(password) : undefined;
+
+
+  const newUser: User = {
+    id: uuid(),
+    username,
+    password: hashedPassword,
+    permissions,
+    isAdmin: false,
+    lastNotificationReadTimestamp: undefined,
+    ...(avatarPath && { avatarPath })
+  };
+
+  const newData: UserData = {
+    users: [...data.users, newUser]
+  };
+
+  await saveUsersData(newData);
+  return newUser;
+}
+
+export async function updateUser(userId: string, updates: Partial<Omit<User, 'id' | 'password'>>): Promise<User> {
+  const data = await loadUsersData()
+  const userIndex = data.users.findIndex(user => user.id === userId)
+
+  if (userIndex === -1) {
+    throw new Error('User not found')
+  }
+
+  // If username is being updated, check for duplicates
+  if (updates.username) {
+    const isDuplicate = data.users.some(
+      user => user.username === updates.username && user.id !== userId
+    )
+    if (isDuplicate) {
+      throw new Error('Username already exists')
+    }
+  }
+
+  const updatedUser = {
+    ...data.users[userIndex],
+    ...updates
+  }
+
+  const newData: UserData = {
+    users: [
+      ...data.users.slice(0, userIndex),
+      updatedUser,
+      ...data.users.slice(userIndex + 1)
+    ]
+  }
+
+  await saveUsersData(newData)
+  return updatedUser
+}
+
+export async function updateUserPassword(userId: string, newPassword?: string): Promise<void> {
+  const data = await loadUsersData()
+  const userIndex = data.users.findIndex(user => user.id === userId)
+
+  if (userIndex === -1) {
+    throw new Error('User not found')
+  }
+
+  const hashedPassword = newPassword ? saltAndHashPassword(newPassword) : ''
+
+  const updatedUser = {
+    ...data.users[userIndex],
+    password: hashedPassword
+  }
+
+  const newData: UserData = {
+    users: [
+      ...data.users.slice(0, userIndex),
+      updatedUser,
+      ...data.users.slice(userIndex + 1)
+    ]
+  }
+
+  await saveUsersData(newData)
+}
+
+export async function deleteUser(userId: string): Promise<void> {
+  const data = await loadUsersData()
+  const userIndex = data.users.findIndex(user => user.id === userId)
+
+  if (userIndex === -1) {
+    throw new Error('User not found')
+  }
+
+  const newData: UserData = {
+    users: [
+      ...data.users.slice(0, userIndex),
+      ...data.users.slice(userIndex + 1)
+    ]
+  }
+
+  await saveUsersData(newData)
+}
+
+export async function updateLastNotificationReadTimestamp(userId: string, timestamp: string): Promise<void> {
+  const data = await loadUsersData()
+  const userIndex = data.users.findIndex(user => user.id === userId)
+
+  if (userIndex === -1) {
+    throw new Error('User not found for updating notification timestamp')
+  }
+
+  const updatedUser = {
+    ...data.users[userIndex],
+    lastNotificationReadTimestamp: timestamp
+  }
+
+  const newData: UserData = {
+    users: [
+      ...data.users.slice(0, userIndex),
+      updatedUser,
+      ...data.users.slice(userIndex + 1)
+    ]
+  }
+
+  await saveUsersData(newData)
+}
+
+
+export async function loadServerSettings(): Promise<ServerSettings> {
+  return {
+    isDemo: !!process.env.DEMO,
+  }
+}

app/actions/user.ts

@@ -0,0 +1,27 @@
+"use server"
+
+import { signIn as signInNextAuth, signOut as signOutNextAuth } from '@/auth';
+
+export async function signIn(username: string, password: string) {
+  try {
+    const result = await signInNextAuth("credentials", {
+      username,
+      password,
+      redirect: false, // This needs to be passed as an option, not as form data
+    });
+    
+    return result;
+  } catch (error) {
+    throw new Error("Invalid credentials");
+  }
+}
+
+export async function signOut() {
+  try {
+    const result = await signOutNextAuth({
+        redirect: false,
+    })
+  } catch (error) {
+    throw new Error("Failed to sign out");
+  }
+}

app/api/auth/[...nextauth]/route.ts

@@ -0,0 +1,2 @@
+import { handlers } from "@/auth"
+export const { GET, POST } = handlers

app/calendar/page.tsx

@@ -1,9 +1,16 @@
 import Layout from '@/components/Layout'
 import HabitCalendar from '@/components/HabitCalendar'
+import { ViewToggle } from '@/components/ViewToggle'
+import CompletionCountBadge from '@/components/CompletionCountBadge'
 
 export default function CalendarPage() {
   return (
-    <HabitCalendar />
+    <div className="flex flex-col gap-4">
+      <div className="flex justify-end">
+        {/* <ViewToggle /> */}
+      </div>
+      <HabitCalendar />
+    </div>
   )
 }
 

app/debug/backup/page.tsx

@@ -0,0 +1,60 @@
+'use client'
+
+import { useState } from 'react';
+import { Button } from '@/components/ui/button';
+import { triggerManualBackup } from '@/app/actions/data'; // Import the server action
+import { Loader2 } from 'lucide-react'; // For loading indicator
+
+export default function DebugBackupPage() {
+  const [isLoading, setIsLoading] = useState(false);
+  const [statusMessage, setStatusMessage] = useState('');
+  const [isError, setIsError] = useState(false);
+
+  const handleBackupClick = async () => {
+    setIsLoading(true);
+    setStatusMessage('Starting backup...');
+    setIsError(false);
+
+    try {
+      const result = await triggerManualBackup();
+      setStatusMessage(result.message);
+      setIsError(!result.success);
+    } catch (error) {
+      console.error("Error calling triggerManualBackup action:", error);
+      setStatusMessage(`Client-side error: ${error instanceof Error ? error.message : 'Unknown error'}`);
+      setIsError(true);
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <div className="p-4">
+      <h1 className="text-xl font-bold mb-4">Debug Backup</h1>
+      <div className="bg-gray-100 dark:bg-gray-800 p-4 rounded space-y-4">
+        <p className="text-muted-foreground">
+          Click the button below to manually trigger the data backup process.
+          Check the server console logs for detailed output. Backups are stored in the `/backups` directory.
+        </p>
+        <Button
+          onClick={handleBackupClick}
+          disabled={isLoading}
+        >
+          {isLoading ? (
+            <>
+              <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+              Running Backup...
+            </>
+          ) : (
+            'Run Manual Backup Now'
+          )}
+        </Button>
+        {statusMessage && (
+          <div className={`mt-4 p-3 rounded ${isError ? 'bg-red-100 dark:bg-red-900 text-red-700 dark:text-red-200' : 'bg-green-100 dark:bg-green-900 text-green-700 dark:text-green-200'}`}>
+            {statusMessage}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

app/debug/habits/page.tsx

@@ -0,0 +1,70 @@
+'use client'
+
+import { useHabits } from "@/hooks/useHabits";
+import { habitsAtom, settingsAtom } from "@/lib/atoms";
+import { Habit } from "@/lib/types";
+import { useAtom } from "jotai";
+import { DateTime } from "luxon";
+
+
+
+type CompletionCache = {
+  [dateKey: string]: {  // dateKey format: "YYYY-MM-DD"
+    [habitId: string]: number  // number of completions on that date
+  }
+}
+
+
+export default function DebugPage() {
+  const [habits] = useAtom(habitsAtom);
+  const [settings]  = useAtom(settingsAtom);
+
+  function buildCompletionCache(habits: Habit[], timezone: string): CompletionCache {
+    const cache: CompletionCache = {};
+
+    habits.forEach(habit => {
+      habit.completions.forEach(utcTimestamp => {
+        // Convert UTC timestamp to local date string in specified timezone
+        const localDate = DateTime
+          .fromISO(utcTimestamp)
+          .setZone(timezone)
+          .toFormat('yyyy-MM-dd');
+
+        if (!cache[localDate]) {
+          cache[localDate] = {};
+        }
+
+        // Increment completion count for this habit on this date
+        cache[localDate][habit.id] = (cache[localDate][habit.id] || 0) + 1;
+      });
+    });
+
+    return cache;
+  }
+
+  function getCompletedHabitsForDate(
+    habits: Habit[],
+    date: DateTime,
+    timezone: string,
+    completionCache: CompletionCache
+  ): Habit[] {
+    const dateKey = date.setZone(timezone).toFormat('yyyy-MM-dd');
+    const dateCompletions = completionCache[dateKey] || {};
+
+    return habits.filter(habit => {
+      const completionsNeeded = habit.targetCompletions || 1;
+      const completionsAchieved = dateCompletions[habit.id] || 0;
+      return completionsAchieved >= completionsNeeded;
+    });
+  }
+
+  const habitCache = buildCompletionCache(habits.habits, settings.system.timezone);
+
+  return (
+    <div className="p-4">
+      <h1 className="text-xl font-bold mb-4">Debug Page</h1>
+      <div className="bg-gray-100 p-4 rounded break-all">
+      </div>
+    </div>
+  );
+}

app/debug/layout.tsx

@@ -0,0 +1,10 @@
+import { ReactNode } from "react";
+
+export default function Debug({children}: {children: ReactNode}) {
+  if (process.env.NODE_ENV !== 'development') return null
+  return (
+    <div className="debug">
+      {children}
+    </div>
+  )
+}

app/debug/user/page.tsx

@@ -0,0 +1,16 @@
+import { saltAndHashPassword } from "@/lib/server-helpers";
+
+export default function DebugPage() {
+  const password = 'admin';
+  const hashedPassword = saltAndHashPassword(password);
+
+  return (
+    <div className="p-4">
+      <h1 className="text-xl font-bold mb-4">Debug Page</h1>
+      <div className="bg-gray-100 p-4 rounded break-all">
+        <p><strong>Password:</strong> {password}</p>
+        <p><strong>Hashed Password:</strong> {hashedPassword}</p>
+      </div>
+    </div>
+  );
+}

app/habits/page.tsx

@@ -1,9 +1,15 @@
 import Layout from '@/components/Layout'
 import HabitList from '@/components/HabitList'
+import { ViewToggle } from '@/components/ViewToggle'
 
 export default function HabitsPage() {
   return (
-    <HabitList />
+    <div className="flex flex-col gap-4">
+      <div className="flex justify-end">
+        {/* <ViewToggle /> */}
+      </div>
+      <HabitList />
+    </div>
   )
 }
 

app/layout.tsx

@@ -4,9 +4,12 @@ import { DM_Sans } from 'next/font/google'
 import { JotaiProvider } from '@/components/jotai-providers'
 import { Suspense } from 'react'
 import { JotaiHydrate } from '@/components/jotai-hydrate'
-import { loadSettings, loadHabitsData, loadCoinsData, loadWishlistData } from './actions/data'
+import { loadSettings, loadHabitsData, loadCoinsData, loadWishlistData, loadUsersData, loadServerSettings } from './actions/data'
 import Layout from '@/components/Layout'
 import { Toaster } from '@/components/ui/toaster'
+import { ThemeProvider } from "@/components/theme-provider"
+import { SessionProvider } from 'next-auth/react'
+
 
 // Inter (clean, modern, excellent readability)
 // const inter = Inter({
@@ -34,15 +37,18 @@ export default async function RootLayout({
 }: {
   children: React.ReactNode
 }) {
-  const [initialSettings, initialHabits, initialCoins, initialWishlist] = await Promise.all([
+  const [initialSettings, initialHabits, initialCoins, initialWishlist, initialUsers, initialServerSettings] = await Promise.all([
     loadSettings(),
     loadHabitsData(),
     loadCoinsData(),
-    loadWishlistData()
+    loadWishlistData(),
+    loadUsersData(),
+    loadServerSettings(),
   ])
 
   return (
-    <html lang="en">
+    // set suppressHydrationWarning to true to prevent hydration errors when using ThemeProvider (https://ui.shadcn.com/docs/dark-mode/next)
+    <html lang="en" suppressHydrationWarning>
       <body className={activeFont.className}>
         <script
           dangerouslySetInnerHTML={{
@@ -68,12 +74,23 @@ export default async function RootLayout({
                 settings: initialSettings,
                 habits: initialHabits,
                 coins: initialCoins,
-                wishlist: initialWishlist
+                wishlist: initialWishlist,
+                users: initialUsers,
+                serverSettings: initialServerSettings,
               }}
             >
-              <Layout>
-                {children}
-              </Layout>
+              <ThemeProvider
+                attribute="class"
+                defaultTheme="system"
+                enableSystem
+                disableTransitionOnChange
+              >
+                <SessionProvider>
+                  <Layout>
+                    {children}
+                  </Layout>
+                </SessionProvider>
+              </ThemeProvider>
             </JotaiHydrate>
           </Suspense>
         </JotaiProvider>

app/settings/page.tsx

@@ -1,19 +1,25 @@
 'use client'
 
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
-import { Switch } from '@/components/ui/switch'
-import { Label } from '@/components/ui/label'
-import { DynamicTimeNoSSR } from '@/components/DynamicTimeNoSSR'
-import { useAtom } from 'jotai'
-import { settingsAtom } from '@/lib/atoms'
-import { Settings } from '@/lib/types'
+import { Switch } from '@/components/ui/switch';
+import { Label } from '@/components/ui/label';
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipProvider,
+  TooltipTrigger,
+} from "@/components/ui/tooltip";
+import { DynamicTimeNoSSR } from '@/components/DynamicTimeNoSSR';
+import { useAtom } from 'jotai';
+import { settingsAtom } from '@/lib/atoms';
+import { Settings, WeekDay } from '@/lib/types'
 import { saveSettings, uploadAvatar } from '../actions/data'
 import { Avatar, AvatarFallback, AvatarImage } from '@/components/ui/avatar'
-import { Button } from '@/components/ui/button'
-import { User } from 'lucide-react'
+import { Button } from '@/components/ui/button';
+import { User, Info } from 'lucide-react'; // Import Info icon
 
 export default function SettingsPage() {
-  const [settings, setSettings] = useAtom(settingsAtom)
+  const [settings, setSettings] = useAtom(settingsAtom);
 
   const updateSettings = async (newSettings: Settings) => {
     await saveSettings(newSettings)
@@ -94,7 +100,7 @@ export default function SettingsPage() {
                       system: { ...settings.system, timezone: e.target.value }
                     })
                   }
-                  className="w-[200px] rounded-md border border-input bg-background px-3 py-2"
+                  className="w-[200px] rounded-md border border-input bg-background px-3 py-2 mb-4"
                 >
                   {Intl.supportedValuesOf('timeZone').map((tz) => (
                     <option key={tz} value={tz}>
@@ -105,63 +111,84 @@ export default function SettingsPage() {
                 <DynamicTimeNoSSR />
               </div>
             </div>
-          </CardContent>
-        </Card>
-        <Card className="mb-6">
-          <CardHeader>
-            <CardTitle>Profile Settings</CardTitle>
-          </CardHeader>
-          <CardContent className="space-y-6">
             <div className="flex items-center justify-between">
               <div className="space-y-0.5">
-                <Label htmlFor="avatar">Avatar</Label>
+                <Label htmlFor="timezone">Week Start Day</Label>
                 <div className="text-sm text-muted-foreground">
-                  Customize your profile picture
+                  Select your preferred first day of the week
                 </div>
               </div>
-              <div className="flex items-center gap-4">
-                <Avatar className="h-16 w-16">
-                  <AvatarImage src={settings.profile?.avatarPath ? `/api/avatars/${settings.profile.avatarPath.split('/').pop()}` : '/avatars/default.png'} />
-                  <AvatarFallback>
-                    <User className="h-8 w-8" />
-                  </AvatarFallback>
-                </Avatar>
-                <form action={async (formData: FormData) => {
-                  const newSettings = await uploadAvatar(formData)
-                  setSettings(newSettings)
-                }}>
-                  <input
-                    type="file"
-                    id="avatar"
-                    name="avatar"
-                    accept="image/png, image/jpeg"
-                    className="hidden"
-                    onChange={(e) => {
-                      const file = e.target.files?.[0]
-                      if (file) {
-                        if (file.size > 5 * 1024 * 1024) { // 5MB
-                          alert('File size must be less than 5MB')
-                          e.target.value = ''
-                          return
-                        }
-                        const form = e.target.form
-                        if (form) form.requestSubmit()
-                      }
-                    }}
-                  />
-                  <Button
-                    type="button"
-                    variant="outline"
-                    onClick={() => document.getElementById('avatar')?.click()}
-                  >
-                    Change
-                  </Button>
-                </form>
+              <div className="flex flex-col items-end gap-2">
+                <select
+                  id="weekStartDay"
+                  value={settings.system.weekStartDay}
+                  onChange={(e) =>
+                    updateSettings({
+                      ...settings,
+                      system: { ...settings.system, weekStartDay: Number(e.target.value) as WeekDay }
+                    })
+                  }
+                  className="w-[200px] rounded-md border border-input bg-background px-3 py-2"
+                >
+                  {([
+                    ['sunday', 0],
+                    ['monday', 1],
+                    ['tuesday', 2],
+                    ['wednesday', 3],
+                    ['thursday', 4],
+                    ['friday', 5],
+                    ['saturday', 6]
+                  ] as Array<[string, WeekDay]>).map(([dayName, dayNumber]) => (
+                    <option key={dayNumber} value={dayNumber}>
+                      {dayName.charAt(0).toUpperCase() + dayName.slice(1)}
+                    </option>
+                  ))}
+                </select>
               </div>
             </div>
+
+            {/* Add this section for Auto Backup */}
+            <div className="flex items-center justify-between">
+              <div className="space-y-0.5">
+                <div className="flex items-center gap-1.5">
+                  <Label htmlFor="auto-backup">Auto Backup</Label>
+                  <TooltipProvider>
+                    <Tooltip>
+                      <TooltipTrigger asChild>
+                        <Info className="h-4 w-4 text-muted-foreground cursor-help" />
+                      </TooltipTrigger>
+                      <TooltipContent side="top" align="start">
+                        <p className="max-w-xs text-sm">
+                          When enabled, the application data (habits, coins, settings, etc.)
+                          will be automatically backed up daily around 2 AM server time.
+                          Backups are stored as ZIP files in the `backups/` directory
+                          at the project root. Only the last 7 backups are kept; older
+                          ones are automatically deleted.
+                        </p>
+                      </TooltipContent>
+                    </Tooltip>
+                  </TooltipProvider>
+                </div>
+                <div className="text-sm text-muted-foreground">
+                  Automatically back up data daily
+                </div>
+              </div>
+              <Switch
+                id="auto-backup"
+                checked={settings.system.autoBackupEnabled}
+                onCheckedChange={(checked) =>
+                  updateSettings({
+                    ...settings,
+                    system: { ...settings.system, autoBackupEnabled: checked }
+                  })
+                }
+              />
+            </div>
+            {/* End of Auto Backup section */}
+
           </CardContent>
         </Card>
-      </div>
+      </div >
     </>
   )
 }

auth.ts

@@ -0,0 +1,44 @@
+import NextAuth from "next-auth"
+import Credentials from "next-auth/providers/credentials"
+import { getUser } from "./app/actions/data"
+import { signInSchema } from "./lib/zod"
+import { SafeUser, SessionUser } from "./lib/types"
+ 
+export const { handlers, signIn, signOut, auth } = NextAuth({
+  trustHost: true,
+  providers: [
+    Credentials({
+      credentials: {
+        username: {},
+        password: {},
+      },
+      authorize: async (credentials) => {
+        const { username, password } = await signInSchema.parseAsync(credentials)
+        
+        // Pass the plaintext password to getUser for verification
+        const user = await getUser(username, password)
+ 
+        if (!user) {
+          throw new Error("Invalid credentials.")
+        }
+ 
+        const safeUser: SessionUser = { id: user.id }
+        return safeUser
+      },
+    }),
+  ],
+  callbacks: {
+    jwt: async ({ token, user }) => {
+      if (user) {
+        token.id = (user as SessionUser).id
+      }
+      return token
+    },
+    session: async ({ session, token }) => {
+      if (session?.user) {
+        session.user.id = token.id as string
+      }
+      return session
+    }
+  }
+})

components/AddEditHabitModal.tsx

@@ -1,38 +1,85 @@
 'use client'
 
-import { useState, useEffect } from 'react'
+import { useState } from 'react'
 import { RRule, RRuleSet, rrulestr } from 'rrule'
 import { useAtom } from 'jotai'
-import { settingsAtom } from '@/lib/atoms'
+import { settingsAtom, browserSettingsAtom, usersAtom } from '@/lib/atoms'
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter } from '@/components/ui/dialog'
 import { Button } from '@/components/ui/button'
+import { Avatar, AvatarImage, AvatarFallback } from '@/components/ui/avatar'
+import { Switch } from '@/components/ui/switch'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
 import { Textarea } from '@/components/ui/textarea'
-import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select'
-import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip'
-import { Info, SmilePlus } from 'lucide-react'
+import { Info, SmilePlus, Zap } from 'lucide-react'
 import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover'
 import data from '@emoji-mart/data'
 import Picker from '@emoji-mart/react'
-import { Habit } from '@/lib/types'
-import { parseNaturalLanguageRRule, parseRRule, serializeRRule } from '@/lib/utils'
-import { INITIAL_RECURRENCE_RULE } from '@/lib/constants'
+import { Habit, SafeUser } from '@/lib/types'
+import { convertHumanReadableFrequencyToMachineReadable, convertMachineReadableFrequencyToHumanReadable, d2s, d2t, serializeRRule } from '@/lib/utils'
+import { INITIAL_DUE, INITIAL_RECURRENCE_RULE, QUICK_DATES, RECURRENCE_RULE_MAP } from '@/lib/constants'
+import * as chrono from 'chrono-node';
+import { DateTime } from 'luxon'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select"
+import { useHelpers } from '@/lib/client-helpers'
 
 interface AddEditHabitModalProps {
   onClose: () => void
   onSave: (habit: Omit<Habit, 'id'>) => Promise<void>
   habit?: Habit | null
+  isTask: boolean
 }
 
-export default function AddEditHabitModal({ onClose, onSave, habit }: AddEditHabitModalProps) {
+export default function AddEditHabitModal({ onClose, onSave, habit, isTask }: AddEditHabitModalProps) {
   const [settings] = useAtom(settingsAtom)
   const [name, setName] = useState(habit?.name || '')
   const [description, setDescription] = useState(habit?.description || '')
   const [coinReward, setCoinReward] = useState(habit?.coinReward || 1)
   const [targetCompletions, setTargetCompletions] = useState(habit?.targetCompletions || 1)
-  const origRuleText = parseRRule(habit?.frequency || INITIAL_RECURRENCE_RULE).toText()
-  const [ruleText, setRuleText] = useState<string>(origRuleText)
+  const isRecurRule = !isTask
+  // Initialize ruleText with the actual frequency string or default, not the display text
+  const initialRuleText = habit?.frequency ? convertMachineReadableFrequencyToHumanReadable({ 
+    frequency: habit.frequency,
+    isRecurRule, 
+    timezone: settings.system.timezone
+  }) : (isRecurRule ? INITIAL_RECURRENCE_RULE : INITIAL_DUE);
+  const [ruleText, setRuleText] = useState<string>(initialRuleText)
+  const { currentUser } = useHelpers()
+  const [isQuickDatesOpen, setIsQuickDatesOpen] = useState(false)
+  const [ruleError, setRuleError] = useState<string | null>(null); // State for validation message
+  const [selectedUserIds, setSelectedUserIds] = useState<string[]>((habit?.userIds || []).filter(id => id !== currentUser?.id))
+  const [usersData] = useAtom(usersAtom)
+  const users = usersData.users
+
+  function getFrequencyUpdate() {
+    if (ruleText === initialRuleText && habit?.frequency) {
+      // If text hasn't changed and original frequency exists, return it
+      return habit.frequency;
+    }
+
+    const parsedResult = convertHumanReadableFrequencyToMachineReadable({
+      text: ruleText,
+      timezone: settings.system.timezone,
+      isRecurring: isRecurRule
+    });
+
+    if (parsedResult.result) {
+      return isRecurRule
+        ? serializeRRule(parsedResult.result as RRule)
+        : d2t({
+          dateTime: parsedResult.result as DateTime,
+          timezone: settings.system.timezone
+        });
+    } else {
+      return 'invalid';
+    }
+  }
 
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault()
@@ -42,9 +89,8 @@ export default function AddEditHabitModal({ onClose, onSave, habit }: AddEditHab
       coinReward,
       targetCompletions: targetCompletions > 1 ? targetCompletions : undefined,
       completions: habit?.completions || [],
-      frequency: habit ? (
-        origRuleText === ruleText ? habit.frequency : serializeRRule(parseNaturalLanguageRRule(ruleText))
-      ) : serializeRRule(parseNaturalLanguageRRule(ruleText)),
+      frequency: getFrequencyUpdate(),
+      userIds: selectedUserIds.length > 0 ? selectedUserIds.concat(currentUser?.id || []) : (currentUser && [currentUser.id])
     })
   }
 
@@ -52,13 +98,13 @@ export default function AddEditHabitModal({ onClose, onSave, habit }: AddEditHab
     <Dialog open={true} onOpenChange={onClose}>
       <DialogContent>
         <DialogHeader>
-          <DialogTitle>{habit ? 'Edit Habit' : 'Add New Habit'}</DialogTitle>
+          <DialogTitle>{habit ? `Edit ${isTask ? 'Task' : 'Habit'}` : `Add New ${isTask ? 'Task' : 'Habit'}`}</DialogTitle>
         </DialogHeader>
         <form onSubmit={handleSubmit}>
           <div className="grid gap-4 py-4">
             <div className="grid grid-cols-4 items-center gap-4">
               <Label htmlFor="name" className="text-right">
-                Name
+                Name *
               </Label>
               <div className='flex col-span-3 gap-2'>
                 <Input
@@ -109,32 +155,78 @@ export default function AddEditHabitModal({ onClose, onSave, habit }: AddEditHab
             </div>
             <div className="grid grid-cols-4 items-center gap-4">
               <Label htmlFor="recurrence" className="text-right">
-                Frequency
+                When *
               </Label>
+              {/* date input (task) */}
               <div className="col-span-3 space-y-2">
-                <Input
-                  id="recurrence"
-                  value={ruleText}
-                  onChange={(e) => setRuleText(e.target.value)}
-                // placeholder="e.g. 'every weekday' or 'every 2 weeks on Monday, Wednesday'"
-                />
+                <div className="flex gap-2">
+                  <Input
+                    id="recurrence"
+                    value={ruleText}
+                    onChange={(e) => setRuleText(e.target.value)}
+                    required
+                  />
+                  {isTask && (
+                    <Popover open={isQuickDatesOpen} onOpenChange={setIsQuickDatesOpen}>
+                      <PopoverTrigger asChild>
+                        <Button
+                          type="button"
+                          variant="ghost"
+                          size="icon"
+                          className="h-8 w-8"
+                        >
+                          <Zap className="h-4 w-4" />
+                        </Button>
+                      </PopoverTrigger>
+                      <PopoverContent className="p-3 w-[280px] max-h-[40vh] overflow-y-auto" align="start">
+                        <div className="space-y-1">
+                          <div className="grid grid-cols-2 gap-2">
+                            {QUICK_DATES.map((date) => (
+                              <Button
+                                key={date.value}
+                                variant="outline"
+                                className="justify-start h-9 px-3 hover:bg-primary hover:text-primary-foreground transition-colors"
+                                onClick={() => {
+                                  setRuleText(date.value);
+                                  setIsQuickDatesOpen(false);
+                                }}
+                              >
+                                {date.label}
+                              </Button>
+                            ))}
+                          </div>
+                        </div>
+                      </PopoverContent>
+                    </Popover>
+                  )}
+                </div>
               </div>
-              <div className="col-start-2 col-span-3 text-sm text-muted-foreground">
-                <span>
-                  {(() => {
-                    try {
-                      return parseNaturalLanguageRRule(ruleText).toText()
-                    } catch (e: unknown) {
-                      return `Invalid rule: ${e instanceof Error ? e.message : 'Invalid recurrence rule'}`
-                    }
-                  })()}
-                </span>
+              {/* rrule input (habit) */}
+              <div className="col-start-2 col-span-3 text-sm">
+                {(() => {
+                  let displayText = '';
+                  let errorMessage: string | null = null;
+                  const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: ruleText, timezone: settings.system.timezone, isRecurring: isRecurRule });
+                  errorMessage = message;
+                  displayText = convertMachineReadableFrequencyToHumanReadable({ frequency: result, isRecurRule, timezone: settings.system.timezone })
+
+                  return (
+                    <>
+                      <span className={errorMessage ? 'text-destructive' : 'text-muted-foreground'}>
+                        {displayText}
+                      </span>
+                      {errorMessage && (
+                        <p className="text-destructive text-xs mt-1">{errorMessage}</p>
+                      )}
+                    </>
+                  );
+                })()}
               </div>
             </div>
             <div className="grid grid-cols-4 items-center gap-4">
               <div className="flex items-center gap-2 justify-end">
                 <Label htmlFor="targetCompletions">
-                  Repetitions
+                  Complete
                 </Label>
               </div>
               <div className="col-span-3">
@@ -168,7 +260,7 @@ export default function AddEditHabitModal({ onClose, onSave, habit }: AddEditHab
                     </button>
                   </div>
                   <span className="text-sm text-muted-foreground">
-                    times per occurrence
+                    times
                   </span>
                 </div>
               </div>
@@ -176,7 +268,7 @@ export default function AddEditHabitModal({ onClose, onSave, habit }: AddEditHab
             <div className="grid grid-cols-4 items-center gap-4">
               <div className="flex items-center gap-2 justify-end">
                 <Label htmlFor="coinReward">
-                  Coin Reward
+                  Reward
                 </Label>
               </div>
               <div className="col-span-3">
@@ -207,14 +299,46 @@ export default function AddEditHabitModal({ onClose, onSave, habit }: AddEditHab
                     </button>
                   </div>
                   <span className="text-sm text-muted-foreground">
-                    coins per completion
+                    coins
                   </span>
                 </div>
               </div>
             </div>
+            {users && users.length > 1 && (
+              <div className="grid grid-cols-4 items-center gap-4">
+                <div className="flex items-center justify-end gap-2">
+                  <Label htmlFor="sharing-toggle">Share</Label>
+                </div>
+                <div className="col-span-3">
+                  <div className="flex flex-wrap gap-2">
+                    {users.filter((u) => u.id !== currentUser?.id).map(user => (
+                      <Avatar
+                        key={user.id}
+                        className={`h-8 w-8 border-2 cursor-pointer
+                          ${selectedUserIds.includes(user.id)
+                            ? 'border-primary'
+                            : 'border-muted'
+                          }`}
+                        title={user.username}
+                        onClick={() => {
+                          setSelectedUserIds(prev =>
+                            prev.includes(user.id)
+                              ? prev.filter(id => id !== user.id)
+                              : [...prev, user.id]
+                          )
+                        }}
+                      >
+                        <AvatarImage src={user?.avatarPath && `/api/avatars/${user.avatarPath.split('/').pop()}` || ""} />
+                        <AvatarFallback>{user.username[0]}</AvatarFallback>
+                      </Avatar>
+                    ))}
+                  </div>
+                </div>
+              </div>
+            )}
           </div>
           <DialogFooter>
-            <Button type="submit">{habit ? 'Save Changes' : 'Add Habit'}</Button>
+            <Button type="submit">{habit ? 'Save Changes' : `Add ${isTask ? 'Task' : 'Habit'}`}</Button>
           </DialogFooter>
         </form>
       </DialogContent>

components/AddEditWishlistItemModal.tsx

@@ -1,55 +1,130 @@
 import { useState, useEffect } from 'react'
+import { useAtom } from 'jotai'
+import { usersAtom } from '@/lib/atoms'
+import { useHelpers } from '@/lib/client-helpers'
+import { Avatar, AvatarFallback, AvatarImage } from './ui/avatar'
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter } from '@/components/ui/dialog'
 import { Button } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
 import { Textarea } from '@/components/ui/textarea'
 import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover'
-import { SmilePlus } from 'lucide-react'
+import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip'
+import { SmilePlus, Info } from 'lucide-react'
 import data from '@emoji-mart/data'
 import Picker from '@emoji-mart/react'
 import { WishlistItemType } from '@/lib/types'
 
 interface AddEditWishlistItemModalProps {
   isOpen: boolean
-  onClose: () => void
-  onSave: (item: Omit<WishlistItemType, 'id'>) => void
-  item?: WishlistItemType | null
+  setIsOpen: (isOpen: boolean) => void
+  editingItem: WishlistItemType | null
+  setEditingItem: (item: WishlistItemType | null) => void
+  addWishlistItem: (item: Omit<WishlistItemType, 'id'>) => void
+  editWishlistItem: (item: WishlistItemType) => void
 }
 
-export default function AddEditWishlistItemModal({ isOpen, onClose, onSave, item }: AddEditWishlistItemModalProps) {
-  const [name, setName] = useState('')
-  const [description, setDescription] = useState('')
-  const [coinCost, setCoinCost] = useState(1)
+export default function AddEditWishlistItemModal({
+  isOpen,
+  setIsOpen,
+  editingItem,
+  setEditingItem,
+  addWishlistItem,
+  editWishlistItem
+}: AddEditWishlistItemModalProps) {
+  const [name, setName] = useState(editingItem?.name || '')
+  const [description, setDescription] = useState(editingItem?.description || '')
+  const [coinCost, setCoinCost] = useState(editingItem?.coinCost || 1)
+  const [targetCompletions, setTargetCompletions] = useState<number | undefined>(editingItem?.targetCompletions)
+  const [link, setLink] = useState(editingItem?.link || '')
+  const { currentUser } = useHelpers()
+  const [selectedUserIds, setSelectedUserIds] = useState<string[]>((editingItem?.userIds || []).filter(id => id !== currentUser?.id))
+  const [errors, setErrors] = useState<{ [key: string]: string }>({})
+  const [usersData] = useAtom(usersAtom)
 
   useEffect(() => {
-    if (item) {
-      setName(item.name)
-      setDescription(item.description)
-      setCoinCost(item.coinCost)
+    if (editingItem) {
+      setName(editingItem.name)
+      setDescription(editingItem.description)
+      setCoinCost(editingItem.coinCost)
+      setTargetCompletions(editingItem.targetCompletions)
+      setLink(editingItem.link || '')
     } else {
       setName('')
       setDescription('')
       setCoinCost(1)
+      setTargetCompletions(undefined)
+      setLink('')
     }
-  }, [item])
+    setErrors({})
+  }, [editingItem])
 
-  const handleSubmit = (e: React.FormEvent) => {
+  const validate = () => {
+    const newErrors: { [key: string]: string } = {}
+    if (!name.trim()) {
+      newErrors.name = 'Name is required'
+    }
+    if (coinCost < 1) {
+      newErrors.coinCost = 'Coin cost must be at least 1'
+    }
+    if (targetCompletions !== undefined && targetCompletions < 1) {
+      newErrors.targetCompletions = 'Target completions must be at least 1'
+    }
+    if (link && !isValidUrl(link)) {
+      newErrors.link = 'Please enter a valid URL'
+    }
+    setErrors(newErrors)
+    return Object.keys(newErrors).length === 0
+  }
+
+  const isValidUrl = (url: string) => {
+    try {
+      new URL(url)
+      return true
+    } catch {
+      return false
+    }
+  }
+
+  const handleClose = () => {
+    setIsOpen(false)
+    setEditingItem(null)
+  }
+
+  const handleSave = (e: React.FormEvent) => {
     e.preventDefault()
-    onSave({ name, description, coinCost })
+    if (!validate()) return
+
+    const itemData = {
+      name,
+      description,
+      coinCost,
+      targetCompletions: targetCompletions || undefined,
+      link: link.trim() || undefined,
+      userIds: selectedUserIds.length > 0 ? selectedUserIds.concat(currentUser?.id || []) : (currentUser && [currentUser.id])
+    }
+
+    if (editingItem) {
+      editWishlistItem({ ...itemData, id: editingItem.id })
+    } else {
+      addWishlistItem(itemData)
+    }
+    
+    setIsOpen(false)
+    setEditingItem(null)
   }
 
   return (
-    <Dialog open={isOpen} onOpenChange={onClose}>
+    <Dialog open={isOpen} onOpenChange={handleClose}>
       <DialogContent>
         <DialogHeader>
-          <DialogTitle>{item ? 'Edit Reward' : 'Add New Reward'}</DialogTitle>
+          <DialogTitle>{editingItem ? 'Edit Reward' : 'Add New Reward'}</DialogTitle>
         </DialogHeader>
-        <form onSubmit={handleSubmit}>
+        <form onSubmit={handleSave}>
           <div className="grid gap-4 py-4">
             <div className="grid grid-cols-4 items-center gap-4">
               <Label htmlFor="name" className="text-right">
-                Name
+                Name *
               </Label>
               <div className="col-span-3 flex gap-2">
                 <Input
@@ -96,22 +171,146 @@ export default function AddEditWishlistItemModal({ isOpen, onClose, onSave, item
               />
             </div>
             <div className="grid grid-cols-4 items-center gap-4">
-              <Label htmlFor="coinCost" className="text-right">
-                Coin Cost
-              </Label>
-              <Input
-                id="coinCost"
-                type="number"
-                value={coinCost}
-                onChange={(e) => setCoinCost(parseInt(e.target.value === "" ? "0" : e.target.value))}
-                className="col-span-3"
-                min={1}
-                required
-              />
+              <div className="flex items-center gap-2 justify-end">
+                <Label htmlFor="coinReward">
+                  Cost
+                </Label>
+              </div>
+              <div className="col-span-3">
+                <div className="flex items-center gap-4">
+                  <div className="flex items-center border rounded-lg overflow-hidden">
+                    <button
+                      type="button"
+                      onClick={() => setCoinCost(prev => Math.max(0, prev - 1))}
+                      className="px-3 py-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-800 dark:hover:bg-gray-700 transition-colors"
+                    >
+                      -
+                    </button>
+                    <Input
+                      id="coinReward"
+                      type="number"
+                      value={coinCost}
+                      onChange={(e) => setCoinCost(parseInt(e.target.value === "" ? "0" : e.target.value))}
+                      min={0}
+                      required
+                      className="w-20 text-center border-0 [appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
+                    />
+                    <button
+                      type="button"
+                      onClick={() => setCoinCost(prev => prev + 1)}
+                      className="px-3 py-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-800 dark:hover:bg-gray-700 transition-colors"
+                    >
+                      +
+                    </button>
+                  </div>
+                  <span className="text-sm text-muted-foreground">
+                    coins
+                  </span>
+                </div>
+              </div>
             </div>
+            <div className="grid grid-cols-4 items-center gap-4">
+              <div className="flex items-center gap-2 justify-end">
+                <Label htmlFor="targetCompletions">
+                  Redeemable
+                </Label>
+              </div>
+              <div className="col-span-3">
+                <div className="flex items-center gap-4">
+                  <div className="flex items-center border rounded-lg overflow-hidden">
+                    <button
+                      type="button"
+                      onClick={() => setTargetCompletions(prev => prev !== undefined && prev > 1 ? prev - 1 : undefined)}
+                      className="px-3 py-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-800 dark:hover:bg-gray-700 transition-colors"
+                    >
+                      -
+                    </button>
+                    <Input
+                      id="targetCompletions"
+                      type="number"
+                      value={targetCompletions || ''}
+                      onChange={(e) => {
+                        const value = e.target.value
+                        setTargetCompletions(value && value !== "0" ? parseInt(value) : undefined)
+                      }}
+                      min={0}
+                      placeholder="∞"
+                      className="w-20 text-center border-0 [appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
+                    />
+                    <button
+                      type="button"
+                      onClick={() => setTargetCompletions(prev => Math.min(10, (prev || 0) + 1))}
+                      className="px-3 py-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-800 dark:hover:bg-gray-700 transition-colors"
+                    >
+                      +
+                    </button>
+                  </div>
+                  <span className="text-sm text-muted-foreground">
+                    times
+                  </span>
+                </div>
+                {errors.targetCompletions && (
+                  <div className="text-sm text-red-500">
+                    {errors.targetCompletions}
+                  </div>
+                )}
+              </div>
+            </div>
+            <div className="grid grid-cols-4 items-center gap-4">
+              <Label htmlFor="link" className="text-right">
+                Link
+              </Label>
+              <div className="col-span-3">
+                <Input
+                  id="link"
+                  type="url"
+                  placeholder="https://..."
+                  value={link}
+                  onChange={(e) => setLink(e.target.value)}
+                  className="col-span-3"
+                />
+                {errors.link && (
+                  <div className="text-sm text-red-500">
+                    {errors.link}
+                  </div>
+                )}
+              </div>
+            </div>
+            {usersData.users && usersData.users.length > 1 && (
+              <div className="grid grid-cols-4 items-center gap-4">
+                <div className="flex items-center justify-end gap-2">
+                  <Label htmlFor="sharing-toggle">Share</Label>
+                </div>
+                <div className="col-span-3">
+                  <div className="flex flex-wrap gap-2">
+                    {usersData.users.filter((u) => u.id !== currentUser?.id).map(user => (
+                      <Avatar
+                        key={user.id}
+                        className={`h-8 w-8 border-2 cursor-pointer
+                          ${selectedUserIds.includes(user.id) 
+                            ? 'border-primary' 
+                            : 'border-muted'
+                          }`}
+                        title={user.username}
+                        onClick={() => {
+                          setSelectedUserIds(prev => 
+                            prev.includes(user.id)
+                              ? prev.filter(id => id !== user.id)
+                              : [...prev, user.id]
+                          )
+                        }}
+                      >
+                        <AvatarImage src={user?.avatarPath && `/api/avatars/${user.avatarPath.split('/').pop()}` || ""} />
+                        <AvatarFallback>{user.username[0]}</AvatarFallback>
+                      </Avatar>
+                    ))}
+                  </div>
+                </div>
+              </div>
+            )}
           </div>
           <DialogFooter>
-            <Button type="submit">{item ? 'Save Changes' : 'Add Reward'}</Button>
+            <Button type="submit">{editingItem ? 'Save Changes' : 'Add Reward'}</Button>
           </DialogFooter>
         </form>
       </DialogContent>

components/ClientWrapper.tsx

@@ -1,12 +1,24 @@
 'use client'
 
-import { ReactNode } from 'react'
+import { ReactNode, useEffect } from 'react'
 import { useAtom } from 'jotai'
-import { pomodoroAtom } from '@/lib/atoms'
+import { pomodoroAtom, userSelectAtom } from '@/lib/atoms'
 import PomodoroTimer from './PomodoroTimer'
+import UserSelectModal from './UserSelectModal'
+import { useSession } from 'next-auth/react'
 
 export default function ClientWrapper({ children }: { children: ReactNode }) {
   const [pomo] = useAtom(pomodoroAtom)
+  const [userSelect, setUserSelect] = useAtom(userSelectAtom)
+  const { data: session, status } = useSession()
+  const currentUserId = session?.user.id
+
+  useEffect(() => {
+    if (status === 'loading') return
+    if (!currentUserId && !userSelect) {
+      setUserSelect(true)
+    }
+  }, [currentUserId, status, userSelect])
 
   return (
     <>
@@ -14,6 +26,9 @@ export default function ClientWrapper({ children }: { children: ReactNode }) {
       {pomo.show && (
         <PomodoroTimer />
       )}
+      {userSelect && (
+        <UserSelectModal onClose={() => setUserSelect(false)}/>
+      )}
     </>
   )
 }

components/CoinsManager.tsx

@@ -1,20 +1,25 @@
 'use client'
 
-import { useState } from 'react'
+import { useState, useEffect, useRef } from 'react' // Import useEffect, useRef
+import { useSearchParams } from 'next/navigation' // Import useSearchParams
 import { t2d, d2s, getNow, isSameDate } from '@/lib/utils'
 import { Button } from '@/components/ui/button'
 import { FormattedNumber } from '@/components/FormattedNumber'
 import { History, Pencil } from 'lucide-react'
+import { Avatar, AvatarImage, AvatarFallback } from '@/components/ui/avatar'
 import EmptyState from './EmptyState'
 import { Input } from '@/components/ui/input'
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
-import { settingsAtom } from '@/lib/atoms'
+import { settingsAtom, usersAtom } from '@/lib/atoms'
 import Link from 'next/link'
 import { useAtom } from 'jotai'
 import { useCoins } from '@/hooks/useCoins'
 import { TransactionNoteEditor } from './TransactionNoteEditor'
+import { useHelpers } from '@/lib/client-helpers'
 
 export default function CoinsManager() {
+  const { currentUser } = useHelpers()
+  const [selectedUser, setSelectedUser] = useState<string>()
   const {
     add,
     remove,
@@ -26,14 +31,39 @@ export default function CoinsManager() {
     totalSpent,
     coinsSpentToday,
     transactionsToday
-  } = useCoins()
+  } = useCoins({selectedUser})
   const [settings] = useAtom(settingsAtom)
+  const [usersData] = useAtom(usersAtom)
   const DEFAULT_AMOUNT = '0'
   const [amount, setAmount] = useState(DEFAULT_AMOUNT)
   const [pageSize, setPageSize] = useState(50)
   const [currentPage, setCurrentPage] = useState(1)
-
   const [note, setNote] = useState('')
+  const searchParams = useSearchParams()
+  const highlightId = searchParams.get('highlight')
+  const userIdFromQuery = searchParams.get('user') // Get user ID from query
+  const transactionRefs = useRef<Record<string, HTMLDivElement | null>>({});
+
+  // Effect to set selected user from query param if admin
+  useEffect(() => {
+    if (currentUser?.isAdmin && userIdFromQuery && userIdFromQuery !== selectedUser) {
+      // Check if the user ID from query exists in usersData
+      if (usersData.users.some(u => u.id === userIdFromQuery)) {
+        setSelectedUser(userIdFromQuery);
+      }
+    }
+    // Only run when userIdFromQuery or currentUser changes, avoid re-running on selectedUser change within this effect
+  }, [userIdFromQuery, currentUser, usersData.users]);
+
+  // Effect to scroll to highlighted transaction
+  useEffect(() => {
+    if (highlightId && transactionRefs.current[highlightId]) {
+      transactionRefs.current[highlightId]?.scrollIntoView({
+        behavior: 'smooth',
+        block: 'center',
+      });
+    }
+  }, [highlightId, transactions]); // Re-run if highlightId or transactions change
 
   const handleSaveNote = async (transactionId: string, note: string) => {
     await updateNote(transactionId, note)
@@ -58,7 +88,22 @@ export default function CoinsManager() {
 
   return (
     <div className="container mx-auto px-4 py-8">
-      <h1 className="text-3xl font-bold mb-6">Coins Management</h1>
+      <div className="flex items-center justify-between mb-6">
+        <h1 className="text-3xl font-bold mr-6">Coins Management</h1>
+        {currentUser?.isAdmin && (
+          <select
+            className="border rounded p-2"
+            value={selectedUser}
+            onChange={(e) => setSelectedUser(e.target.value)}
+          >
+            {usersData.users.map(user => (
+              <option key={user.id} value={user.id}>
+                {user.username}
+              </option>
+            ))}
+          </select>
+        )}
+      </div>
 
       <div className="grid gap-6 md:grid-cols-2">
         <Card>
@@ -229,13 +274,17 @@ export default function CoinsManager() {
                         }
                       }
 
+                      const isHighlighted = transaction.id === highlightId;
                       return (
                         <div
                           key={transaction.id}
-                          className="flex justify-between items-center p-3 border rounded hover:bg-gray-50 dark:hover:bg-gray-800 transition-colors"
+                          ref={(el) => { transactionRefs.current[transaction.id] = el; }} // Assign ref correctly
+                          className={`flex justify-between items-center p-3 border rounded hover:bg-gray-50 dark:hover:bg-gray-800 transition-colors ${
+                            isHighlighted ? 'ring-2 ring-blue-500 bg-blue-50 dark:bg-blue-900/30' : '' // Apply highlight styles
+                          }`}
                         >
-                          <div className="space-y-1">
-                            <div className="flex items-center gap-2">
+                          <div className="space-y-1 flex-grow mr-4"> {/* Added flex-grow and margin */}
+                            <div className="flex items-center gap-2 flex-wrap"> {/* Added flex-wrap */}
                               {transaction.relatedItemId ? (
                                 <Link
                                   href={`${transaction.type === 'WISH_REDEMPTION' ? '/wishlist' : '/habits'}?highlight=${transaction.relatedItemId}`}
@@ -252,6 +301,18 @@ export default function CoinsManager() {
                               >
                                 {transaction.type.split('_').join(' ')}
                               </span>
+                              {transaction.userId && currentUser?.isAdmin && (
+                                <Avatar className="h-6 w-6">
+                                  <AvatarImage
+                                    src={usersData.users.find(u => u.id === transaction.userId)?.avatarPath ?
+                                      `/api/avatars/${usersData.users.find(u => u.id === transaction.userId)?.avatarPath?.split('/').pop()}` : undefined}
+                                    alt={usersData.users.find(u => u.id === transaction.userId)?.username}
+                                  />
+                                  <AvatarFallback>
+                                    {usersData.users.find(u => u.id === transaction.userId)?.username?.[0] || '?'}
+                                  </AvatarFallback>
+                                </Avatar>
+                              )}
                             </div>
                             <p className="text-sm text-gray-500">
                               {d2s({ dateTime: t2d({ timestamp: transaction.timestamp, timezone: settings.system.timezone }), timezone: settings.system.timezone })}
@@ -263,14 +324,16 @@ export default function CoinsManager() {
                               onDelete={handleDeleteNote}
                             />
                           </div>
-                          <span
-                            className={`font-mono ${transaction.amount >= 0
-                              ? 'text-green-600 dark:text-green-400'
-                              : 'text-red-600 dark:text-red-400'
-                              }`}
-                          >
-                            {transaction.amount >= 0 ? '+' : ''}{transaction.amount}
-                          </span>
+                          <div className="flex-shrink-0 text-right"> {/* Ensure amount stays on the right */}
+                            <span
+                              className={`font-mono ${transaction.amount >= 0
+                                ? 'text-green-600 dark:text-green-400'
+                                : 'text-red-600 dark:text-red-400'
+                                }`}
+                            >
+                              {transaction.amount >= 0 ? '+' : ''}{transaction.amount}
+                            </span>
+                          </div>
                         </div>
                       )
                     })}

components/CompletionCountBadge.tsx

@@ -0,0 +1,35 @@
+import { Badge } from "@/components/ui/badge"
+import { useAtom } from 'jotai'
+import { completedHabitsMapAtom, habitsAtom, habitsByDateFamily } from '@/lib/atoms'
+import { getTodayInTimezone } from '@/lib/utils'
+import { useHabits } from '@/hooks/useHabits'
+import { settingsAtom } from '@/lib/atoms'
+
+interface CompletionCountBadgeProps {
+  type: 'habits' | 'tasks'
+  date?: string
+}
+
+export default function CompletionCountBadge({
+  type,
+  date
+}: CompletionCountBadgeProps) {
+  const [settings] = useAtom(settingsAtom)
+  const [completedHabitsMap] = useAtom(completedHabitsMapAtom)
+  const targetDate = date || getTodayInTimezone(settings.system.timezone)
+  const [dueHabits] = useAtom(habitsByDateFamily(targetDate))
+
+  const completedCount = completedHabitsMap.get(targetDate)?.filter(h => 
+    type === 'tasks' ? h.isTask : !h.isTask
+  ).length || 0
+
+  const totalCount = dueHabits.filter(h => 
+    type === 'tasks' ? h.isTask : !h.isTask
+  ).length
+
+  return (
+    <Badge variant="secondary">
+      {`${completedCount}/${totalCount} Completed`}
+    </Badge>
+  )
+}

components/DailyOverview.tsx

@@ -1,23 +1,35 @@
-import { Circle, Coins, ArrowRight, CircleCheck, ChevronDown, ChevronUp, Timer } from 'lucide-react'
+import { Circle, Coins, ArrowRight, CircleCheck, ChevronDown, ChevronUp, Plus, Pin, AlertTriangle } from 'lucide-react' // Removed unused icons
+import CompletionCountBadge from './CompletionCountBadge'
 import {
   ContextMenu,
   ContextMenuContent,
   ContextMenuItem,
+  ContextMenuSeparator,
   ContextMenuTrigger,
 } from "@/components/ui/context-menu"
-import { cn, isHabitDueToday, getHabitFreq } from '@/lib/utils'
+import { cn } from '@/lib/utils'
 import Link from 'next/link'
-import { useState, useEffect } from 'react'
+import { useState } from 'react'
 import { useAtom } from 'jotai'
-import { pomodoroAtom, settingsAtom } from '@/lib/atoms'
-import { getTodayInTimezone, isSameDate, t2d, d2t, getNow, getCompletedHabitsForDate, getCompletionsForDate } from '@/lib/utils'
+import { pomodoroAtom, settingsAtom, completedHabitsMapAtom, browserSettingsAtom, BrowserSettings, hasTasksAtom } from '@/lib/atoms'
+import { getTodayInTimezone, isSameDate, t2d, d2t, getNow, isHabitDue, isTaskOverdue } from '@/lib/utils'
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
 import { Badge } from '@/components/ui/badge'
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipProvider,
+  TooltipTrigger,
+} from "@/components/ui/tooltip"
 import { Progress } from '@/components/ui/progress'
-import { WishlistItemType } from '@/lib/types'
+import { Settings, WishlistItemType } from '@/lib/types'
 import { Habit } from '@/lib/types'
 import Linkify from './linkify'
 import { useHabits } from '@/hooks/useHabits'
+import AddEditHabitModal from './AddEditHabitModal'
+import ConfirmDialog from './ConfirmDialog'
+import { Button } from './ui/button'
+import { HabitContextMenuItems } from './HabitContextMenuItems'
 
 interface UpcomingItemsProps {
   habits: Habit[]
@@ -25,6 +37,323 @@ interface UpcomingItemsProps {
   coinBalance: number
 }
 
+interface ItemSectionProps {
+  title: string;
+  items: Habit[];
+  emptyMessage: string;
+  isTask: boolean;
+  viewLink: string;
+  addNewItem: () => void;
+}
+
+const ItemSection = ({
+  title,
+  items,
+  emptyMessage,
+  isTask,
+  viewLink,
+  addNewItem,
+}: ItemSectionProps) => {
+  const { completeHabit, undoComplete, saveHabit, deleteHabit, archiveHabit, habitFreqMap } = useHabits();
+  const [_, setPomo] = useAtom(pomodoroAtom);
+  const [browserSettings, setBrowserSettings] = useAtom(browserSettingsAtom);
+  const [settings] = useAtom(settingsAtom);
+  const [completedHabitsMap] = useAtom(completedHabitsMapAtom);
+
+  const today = getTodayInTimezone(settings.system.timezone);
+  const currentTodayCompletions = completedHabitsMap.get(today) || [];
+  const currentBadgeType = isTask ? 'tasks' : 'habits';
+
+  const currentExpanded = isTask ? browserSettings.expandedTasks : browserSettings.expandedHabits;
+  const setCurrentExpanded = (value: boolean) => {
+    setBrowserSettings(prev => ({
+      ...prev,
+      [isTask ? 'expandedTasks' : 'expandedHabits']: value
+    }));
+  };
+
+  const [isConfirmDeleteDialogOpen, setIsConfirmDeleteDialogOpen] = useState(false);
+  const [habitToDelete, setHabitToDelete] = useState<Habit | null>(null);
+  const [habitToEdit, setHabitToEdit] = useState<Habit | null>(null);
+
+  const handleDeleteClick = (habit: Habit) => {
+    setHabitToDelete(habit);
+    setIsConfirmDeleteDialogOpen(true);
+  };
+
+  const confirmDelete = async () => {
+    if (habitToDelete) {
+      await deleteHabit(habitToDelete.id);
+      setHabitToDelete(null);
+      setIsConfirmDeleteDialogOpen(false);
+    }
+  };
+
+  const handleEditClick = (habit: Habit) => {
+    setHabitToEdit(habit);
+  };
+
+  if (items.length === 0) {
+    return (
+      <div>
+        <div className="flex items-center justify-between mb-2">
+          <h3 className="font-semibold">{title}</h3>
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-7 w-7 rounded-full hover:bg-primary/10 hover:text-primary"
+            onClick={addNewItem}
+          >
+            <Plus className="h-4 w-4" />
+            <span className="sr-only">Add {isTask ? "Task" : "Habit"}</span>
+          </Button>
+        </div>
+        <div className="text-center text-muted-foreground text-sm py-4">
+          {emptyMessage}
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div>
+      <div className="flex items-center justify-between mb-2">
+        <div className="flex items-center gap-2">
+          <h3 className="font-semibold">{title}</h3>
+        </div>
+        <div className="flex items-center gap-2">
+          <CompletionCountBadge type={currentBadgeType} />
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-7 w-7 rounded-full hover:bg-primary/10 hover:text-primary"
+            onClick={addNewItem}
+          >
+            <Plus className="h-4 w-4" />
+            <span className="sr-only">Add {isTask ? "Task" : "Habit"}</span>
+          </Button>
+        </div>
+      </div>
+      <ul className={`grid gap-2 transition-all duration-300 ease-in-out ${currentExpanded ? 'max-h-none' : 'max-h-[200px]'} overflow-hidden`}>
+        {items
+          .sort((a, b) => {
+            // First by pinned status
+            if (a.pinned !== b.pinned) {
+              return a.pinned ? -1 : 1;
+            }
+
+            // Then by completion status
+            const aCompleted = currentTodayCompletions.includes(a);
+            const bCompleted = currentTodayCompletions.includes(b);
+            if (aCompleted !== bCompleted) {
+              return aCompleted ? 1 : -1;
+            }
+
+            // Then by frequency (daily first)
+            const aFreq = habitFreqMap.get(a.id) || 'daily';
+            const bFreq = habitFreqMap.get(b.id) || 'daily';
+            const freqOrder = ['daily', 'weekly', 'monthly', 'yearly'];
+            if (freqOrder.indexOf(aFreq) !== freqOrder.indexOf(bFreq)) {
+              return freqOrder.indexOf(aFreq) - freqOrder.indexOf(bFreq);
+            }
+
+            // Then by coin reward (higher first)
+            if (a.coinReward !== b.coinReward) {
+              return b.coinReward - a.coinReward;
+            }
+
+            // Finally by target completions (higher first)
+            const aTarget = a.targetCompletions || 1;
+            const bTarget = b.targetCompletions || 1;
+            return bTarget - aTarget;
+          })
+          .slice(0, currentExpanded ? undefined : 5)
+          .map((habit) => {
+            const completionsToday = habit.completions.filter(completion =>
+              isSameDate(t2d({ timestamp: completion, timezone: settings.system.timezone }), t2d({ timestamp: d2t({ dateTime: getNow({ timezone: settings.system.timezone }) }), timezone: settings.system.timezone }))
+            ).length
+            const target = habit.targetCompletions || 1
+            const isCompleted = completionsToday >= target || (isTask && habit.archived)
+            return (
+              <li
+                className={`flex items-center justify-between text-sm p-2 rounded-md
+                ${isCompleted ? 'bg-secondary/50' : 'bg-secondary/20'}`}
+                key={habit.id}
+              >
+                <span className="flex items-center gap-2 flex-1 min-w-0">
+                  <ContextMenu>
+                    <ContextMenuTrigger asChild>
+                      <div className="flex items-center gap-2 cursor-pointer flex-1 min-w-0">
+                        <div className="flex-shrink-0">
+                          <button
+                            onClick={(e) => {
+                              e.preventDefault();
+                              e.stopPropagation();
+                              if (isCompleted) {
+                                undoComplete(habit);
+                              } else {
+                                completeHabit(habit);
+                              }
+                            }}
+                            className="relative hover:opacity-70 transition-opacity w-4 h-4"
+                          >
+                            {isCompleted ? (
+                              <CircleCheck className="h-4 w-4 text-green-500" />
+                            ) : (
+                              <div className="relative h-4 w-4">
+                                <Circle className="absolute h-4 w-4 text-muted-foreground" />
+                                <div
+                                  className="absolute h-4 w-4 rounded-full overflow-hidden"
+                                  style={{
+                                    background: `conic-gradient(
+                                  currentColor ${(completionsToday / target) * 360}deg,
+                                  transparent ${(completionsToday / target) * 360}deg 360deg
+                                )`,
+                                    mask: 'radial-gradient(transparent 50%, black 51%)',
+                                    WebkitMask: 'radial-gradient(transparent 50%, black 51%)'
+                                  }}
+                                />
+                              </div>
+                            )}
+                          </button>
+                        </div>
+                        <span className="flex items-center gap-1">
+                          {habit.pinned && (
+                            <Pin className="h-4 w-4 text-yellow-500" />
+                          )}
+                          <Link
+                            href={`/habits?highlight=${habit.id}`}
+                            className="flex items-center gap-1 hover:text-primary transition-colors"
+                            onClick={() => {
+                              const newViewType = isTask ? 'tasks' : 'habits';
+                              if (browserSettings.viewType !== newViewType) {
+                                setBrowserSettings(prev => ({ ...prev, viewType: newViewType }));
+                              }
+                            }}
+                          >
+                            {isTask && isTaskOverdue(habit, settings.system.timezone) && !isCompleted && (
+                              <TooltipProvider>
+                                <Tooltip delayDuration={0}>
+                                  <TooltipTrigger asChild>
+                                    {/* The AlertTriangle itself doesn't need hover styles if the parent Link handles it */}
+                                    <AlertTriangle className="h-4 w-4 flex-shrink-0 text-red-600 dark:text-red-500" />
+                                  </TooltipTrigger>
+                                  <TooltipContent>
+                                    <p>Overdue</p>
+                                  </TooltipContent>
+                                </Tooltip>
+                              </TooltipProvider>
+                            )}
+                            <span
+                              className={cn(
+                                isCompleted ? 'line-through' : '',
+                                'break-all' // Text specific styles
+                              )}
+                            >
+                              {habit.name}
+                            </span>
+                          </Link>
+                        </span>
+                      </div>
+                    </ContextMenuTrigger>
+                    <ContextMenuContent className="w-64">
+                      <HabitContextMenuItems
+                        habit={habit}
+                        onEditRequest={() => handleEditClick(habit)}
+                        onDeleteRequest={() => handleDeleteClick(habit)}
+                        context="daily-overview"
+                      />
+                    </ContextMenuContent>
+                  </ContextMenu>
+                </span>
+                <span className="flex items-center gap-2 text-xs text-muted-foreground flex-shrink-0">
+                  {habit.targetCompletions && (
+                    <span className="bg-secondary px-1.5 py-0.5 rounded-full">
+                      {completionsToday}/{target}
+                    </span>
+                  )}
+                  {habitFreqMap.get(habit.id) !== 'daily' && (
+                    <Badge variant="outline" className="text-xs">
+                      {habitFreqMap.get(habit.id)}
+                    </Badge>
+                  )}
+                  <span className="flex items-center">
+                    <Coins className={cn(
+                      "h-3 w-3 mr-1 transition-all",
+                      isCompleted
+                        ? "text-yellow-500 drop-shadow-[0_0_2px_rgba(234,179,8,0.3)]"
+                        : "text-gray-400"
+                    )} />
+                    <span className={cn(
+                      "transition-all",
+                      isCompleted
+                        ? "text-yellow-500 font-medium"
+                        : "text-gray-400"
+                    )}>
+                      {habit.coinReward}
+                    </span>
+                  </span>
+                </span>
+              </li>
+            )
+          })}
+      </ul>
+      <div className="flex items-center justify-between">
+        <button
+          onClick={() => setCurrentExpanded(!currentExpanded)}
+          className="text-sm text-muted-foreground hover:text-primary flex items-center gap-1"
+        >
+          {currentExpanded ? (
+            <>
+              Show less
+              <ChevronUp className="h-3 w-3" />
+            </>
+          ) : (
+            <>
+              Show all
+              <ChevronDown className="h-3 w-3" />
+            </>
+          )}
+        </button>
+        <Link
+          href={viewLink}
+          className="text-sm text-muted-foreground hover:text-primary flex items-center gap-1"
+          onClick={() => {
+            const newViewType = isTask ? 'tasks' : 'habits';
+            if (browserSettings.viewType !== newViewType) {
+              setBrowserSettings(prev => ({ ...prev, viewType: newViewType }));
+            }
+          }}
+        >
+          View
+          <ArrowRight className="h-3 w-3" />
+        </Link>
+      </div>
+      {habitToDelete && (
+        <ConfirmDialog
+          isOpen={isConfirmDeleteDialogOpen}
+          onClose={() => setIsConfirmDeleteDialogOpen(false)}
+          onConfirm={confirmDelete}
+          title={`Delete ${isTask ? 'Task' : 'Habit'}`}
+          message={`Are you sure you want to delete "${habitToDelete.name}"? This action cannot be undone.`}
+          confirmText="Delete"
+        />
+      )}
+      {habitToEdit && (
+        <AddEditHabitModal
+          onClose={() => setHabitToEdit(null)}
+          onSave={async (updatedHabit) => {
+            await saveHabit({ ...habitToEdit, ...updatedHabit });
+            setHabitToEdit(null);
+          }}
+          habit={habitToEdit}
+          isTask={habitToEdit.isTask || false}
+        />
+      )}
+    </div>
+  );
+};
+
 export default function DailyOverview({
   habits,
   wishlistItems,
@@ -32,22 +361,30 @@ export default function DailyOverview({
 }: UpcomingItemsProps) {
   const { completeHabit, undoComplete } = useHabits()
   const [settings] = useAtom(settingsAtom)
-  const [dailyHabits, setDailyHabits] = useState<Habit[]>([])
+  const [completedHabitsMap] = useAtom(completedHabitsMapAtom)
+  const [browserSettings, setBrowserSettings] = useAtom(browserSettingsAtom)
   const today = getTodayInTimezone(settings.system.timezone)
-  const todayCompletions = getCompletedHabitsForDate({
-    habits,
-    date: getNow({ timezone: settings.system.timezone }),
-    timezone: settings.system.timezone
-  })
+  const todayCompletions = completedHabitsMap.get(today) || []
+  const { saveHabit } = useHabits()
 
-  useEffect(() => {
-    // Filter habits that are due today based on their recurrence rule
-    const filteredHabits = habits.filter(habit => isHabitDueToday(habit, settings.system.timezone))
-    setDailyHabits(filteredHabits)
-  }, [habits])
+  const timezone = settings.system.timezone
+  const todayDateObj = getNow({ timezone })
+
+  const dailyTasks = habits.filter(habit =>
+    habit.isTask &&
+    !habit.archived &&
+    (isHabitDue({ habit, timezone, date: todayDateObj }) || isTaskOverdue(habit, timezone))
+  )
+  const dailyHabits = habits.filter(habit =>
+    !habit.isTask &&
+    !habit.archived &&
+    isHabitDue({ habit, timezone, date: todayDateObj })
+  )
 
   // Get all wishlist items sorted by redeemable status (non-redeemable first) then by coin cost
+  // Filter out archived wishlist items
   const sortedWishlistItems = wishlistItems
+    .filter(item => !item.archived)
     .sort((a, b) => {
       const aRedeemable = a.coinCost <= coinBalance
       const bRedeemable = b.coinCost <= coinBalance
@@ -61,9 +398,15 @@ export default function DailyOverview({
       return a.coinCost - b.coinCost
     })
 
-  const [expandedHabits, setExpandedHabits] = useState(false)
-  const [expandedWishlist, setExpandedWishlist] = useState(false)
-  const [_, setPomo] = useAtom(pomodoroAtom)
+  const [hasTasks] = useAtom(hasTasksAtom)
+  const [, setPomo] = useAtom(pomodoroAtom)
+  const [modalConfig, setModalConfig] = useState<{
+    isOpen: boolean,
+    isTask: boolean
+  }>({
+    isOpen: false,
+    isTask: false
+  });
 
   return (
     <>
@@ -72,175 +415,28 @@ export default function DailyOverview({
           <CardTitle>Today's Overview</CardTitle>
         </CardHeader>
         <CardContent>
-          <div className="space-y-4">
-            <div>
-              <div className="flex items-center justify-between mb-2">
-                <h3 className="font-semibold">Daily Habits</h3>
-                <Badge variant="secondary">
-                  {dailyHabits.filter(habit => {
-                    const completions = getCompletionsForDate({
-                      habit,
-                      date: today,
-                      timezone: settings.system.timezone
-                    });
-                    return completions >= (habit.targetCompletions || 1);
-                  }).length}/{dailyHabits.length} Completed
-                </Badge>
-              </div>
-              <ul className={`grid gap-2 transition-all duration-300 ease-in-out ${expandedHabits ? 'max-h-none' : 'max-h-[200px]'} overflow-hidden`}>
-                {dailyHabits
-                  .sort((a, b) => {
-                    // First by completion status
-                    const aCompleted = todayCompletions.includes(a);
-                    const bCompleted = todayCompletions.includes(b);
-                    if (aCompleted !== bCompleted) {
-                      return aCompleted ? 1 : -1;
-                    }
+          <div className="space-y-6">
+            {/* Tasks Section */}
+            {hasTasks && (
+              <ItemSection
+                title="Daily Tasks"
+                items={dailyTasks}
+                emptyMessage="No tasks due today. Add some tasks to get started!"
+                isTask={true}
+                viewLink="/habits?view=tasks"
+                addNewItem={() => setModalConfig({ isOpen: true, isTask: true })}
+              />
+            )}
 
-                    // Then by frequency (daily first)
-                    const aFreq = getHabitFreq(a);
-                    const bFreq = getHabitFreq(b);
-                    const freqOrder = ['daily', 'weekly', 'monthly', 'yearly'];
-                    if (freqOrder.indexOf(aFreq) !== freqOrder.indexOf(bFreq)) {
-                      return freqOrder.indexOf(aFreq) - freqOrder.indexOf(bFreq);
-                    }
-
-                    // Then by coin reward (higher first)
-                    if (a.coinReward !== b.coinReward) {
-                      return b.coinReward - a.coinReward;
-                    }
-
-                    // Finally by target completions (higher first)
-                    const aTarget = a.targetCompletions || 1;
-                    const bTarget = b.targetCompletions || 1;
-                    return bTarget - aTarget;
-                  })
-                  .slice(0, expandedHabits ? undefined : 5)
-                  .map((habit) => {
-                    const completionsToday = habit.completions.filter(completion =>
-                      isSameDate(t2d({ timestamp: completion, timezone: settings.system.timezone }), t2d({ timestamp: d2t({ dateTime: getNow({ timezone: settings.system.timezone }) }), timezone: settings.system.timezone }))
-                    ).length
-                    const target = habit.targetCompletions || 1
-                    const isCompleted = completionsToday >= target
-                    return (
-                      <li
-                        className={`flex items-center justify-between text-sm p-2 rounded-md
-                        ${isCompleted ? 'bg-secondary/50' : 'bg-secondary/20'}`}
-                        key={habit.id}
-                      >
-                        <span className="flex items-center gap-2">
-                          <ContextMenu>
-                            <ContextMenuTrigger asChild>
-                              <div className="flex-none">
-                                <button
-                                  onClick={(e) => {
-                                    e.preventDefault();
-                                    if (isCompleted) {
-                                      undoComplete(habit);
-                                    } else {
-                                      completeHabit(habit);
-                                    }
-                                  }}
-                                  className="relative hover:opacity-70 transition-opacity w-4 h-4"
-                                >
-                                  {isCompleted ? (
-                                    <CircleCheck className="h-4 w-4 text-green-500" />
-                                  ) : (
-                                    <div className="relative h-4 w-4">
-                                      <Circle className="absolute h-4 w-4 text-muted-foreground" />
-                                      <div
-                                        className="absolute h-4 w-4 rounded-full overflow-hidden"
-                                        style={{
-                                          background: `conic-gradient(
-                                        currentColor ${(completionsToday / target) * 360}deg,
-                                        transparent ${(completionsToday / target) * 360}deg 360deg
-                                      )`,
-                                          mask: 'radial-gradient(transparent 50%, black 51%)',
-                                          WebkitMask: 'radial-gradient(transparent 50%, black 51%)'
-                                        }}
-                                      />
-                                    </div>
-                                  )}
-                                </button>
-                              </div>
-                            </ContextMenuTrigger>
-                            <span className={isCompleted ? 'line-through' : ''}>
-                              <Linkify>
-                                {habit.name}
-                              </Linkify>
-                            </span>
-                            <ContextMenuContent className="w-64">
-                              <ContextMenuItem onClick={() => {
-                                setPomo((prev) => ({
-                                  ...prev,
-                                  show: true,
-                                  selectedHabitId: habit.id
-                                }))
-                              }}>
-                                <Timer className="mr-2 h-4 w-4" />
-                                <span>Start Pomodoro</span>
-                              </ContextMenuItem>
-                            </ContextMenuContent>
-                          </ContextMenu>
-                        </span>
-                        <span className="flex items-center gap-2 text-xs text-muted-foreground">
-                          {habit.targetCompletions && (
-                            <span className="bg-secondary px-1.5 py-0.5 rounded-full">
-                              {completionsToday}/{target}
-                            </span>
-                          )}
-                          {getHabitFreq(habit) !== 'daily' && (
-                            <Badge variant="outline" className="text-xs">
-                              {getHabitFreq(habit)}
-                            </Badge>
-                          )}
-                          <span className="flex items-center">
-                            <Coins className={cn(
-                              "h-3 w-3 mr-1 transition-all",
-                              isCompleted
-                                ? "text-yellow-500 drop-shadow-[0_0_2px_rgba(234,179,8,0.3)]"
-                                : "text-gray-400"
-                            )} />
-                            <span className={cn(
-                              "transition-all",
-                              isCompleted
-                                ? "text-yellow-500 font-medium"
-                                : "text-gray-400"
-                            )}>
-                              {habit.coinReward}
-                            </span>
-                          </span>
-                        </span>
-                      </li>
-                    )
-                  })}
-              </ul>
-              <div className="flex items-center justify-between">
-                <button
-                  onClick={() => setExpandedHabits(!expandedHabits)}
-                  className="text-sm text-muted-foreground hover:text-primary flex items-center gap-1"
-                >
-                  {expandedHabits ? (
-                    <>
-                      Show less
-                      <ChevronUp className="h-3 w-3" />
-                    </>
-                  ) : (
-                    <>
-                      Show all
-                      <ChevronDown className="h-3 w-3" />
-                    </>
-                  )}
-                </button>
-                <Link
-                  href="/habits"
-                  className="text-sm text-muted-foreground hover:text-primary flex items-center gap-1"
-                >
-                  View
-                  <ArrowRight className="h-3 w-3" />
-                </Link>
-              </div>
-            </div>
+            {/* Habits Section */}
+            <ItemSection
+              title="Daily Habits"
+              items={dailyHabits}
+              emptyMessage="No habits due today. Add some habits to get started!"
+              isTask={false}
+              viewLink="/habits"
+              addNewItem={() => setModalConfig({ isOpen: true, isTask: false })}
+            />
 
             <div className="space-y-2">
               <div className="flex items-center justify-between mb-2">
@@ -250,7 +446,7 @@ export default function DailyOverview({
                 </Badge>
               </div>
               <div>
-                <div className={`space-y-3 transition-all duration-300 ease-in-out ${expandedWishlist ? 'max-h-none' : 'max-h-[200px]'} overflow-hidden`}>
+                <div className={`space-y-3 transition-all duration-300 ease-in-out ${browserSettings.expandedWishlist ? 'max-h-none' : 'max-h-[200px]'} overflow-hidden`}>
                   {sortedWishlistItems.length === 0 ? (
                     <div className="text-center text-muted-foreground text-sm py-4">
                       No wishlist items yet. Add some goals to work towards!
@@ -258,7 +454,7 @@ export default function DailyOverview({
                   ) : (
                     <>
                       {sortedWishlistItems
-                        .slice(0, expandedWishlist ? undefined : 5)
+                        .slice(0, browserSettings.expandedWishlist ? undefined : 5)
                         .map((item) => {
                           const isRedeemable = item.coinCost <= coinBalance
                           return (
@@ -312,10 +508,10 @@ export default function DailyOverview({
                 </div>
                 <div className="flex items-center justify-between">
                   <button
-                    onClick={() => setExpandedWishlist(!expandedWishlist)}
+                    onClick={() => setBrowserSettings(prev => ({ ...prev, expandedWishlist: !prev.expandedWishlist }))}
                     className="text-sm text-muted-foreground hover:text-primary flex items-center gap-1"
                   >
-                    {expandedWishlist ? (
+                    {browserSettings.expandedWishlist ? (
                       <>
                         Show less
                         <ChevronUp className="h-3 w-3" />
@@ -340,6 +536,17 @@ export default function DailyOverview({
           </div>
         </CardContent>
       </Card>
+      {modalConfig.isOpen && (
+        <AddEditHabitModal
+          onClose={() => setModalConfig({ isOpen: false, isTask: false })}
+          onSave={async (habit) => {
+            await saveHabit({ ...habit, isTask: modalConfig.isTask })
+            setModalConfig({ isOpen: false, isTask: false });
+          }}
+          habit={null}
+          isTask={modalConfig.isTask}
+        />
+      )}
     </>
   )
 }

components/Dashboard.tsx

@@ -1,31 +1,33 @@
 'use client'
 
 import { useAtom } from 'jotai'
-import { wishlistAtom, habitsAtom, settingsAtom, coinsAtom } from '@/lib/atoms'
+import { wishlistAtom, habitsAtom, settingsAtom } from '@/lib/atoms'
 import DailyOverview from './DailyOverview'
 import HabitStreak from './HabitStreak'
 import CoinBalance from './CoinBalance'
 import { useHabits } from '@/hooks/useHabits'
+import { useCoins } from '@/hooks/useCoins'
 
 export default function Dashboard() {
   const [habitsData] = useAtom(habitsAtom)
   const habits = habitsData.habits
   const [settings] = useAtom(settingsAtom)
-  const [coins] = useAtom(coinsAtom)
-  const coinBalance = coins.balance
+  const { balance } = useCoins()
   const [wishlist] = useAtom(wishlistAtom)
   const wishlistItems = wishlist.items
 
   return (
     <div className="container mx-auto px-4 py-8">
-      <h1 className="text-3xl font-bold mb-6">Dashboard</h1>
+      <div className="flex justify-between items-center mb-6">
+        <h1 className="text-3xl font-bold">Dashboard</h1>
+      </div>
       <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
-        <CoinBalance coinBalance={coinBalance} />
+        <CoinBalance coinBalance={balance} />
         <HabitStreak habits={habits} />
         <DailyOverview
           wishlistItems={wishlistItems}
           habits={habits}
-          coinBalance={coinBalance}
+          coinBalance={balance}
         />
 
         {/* <HabitHeatmap habits={habits} /> */}

components/HabitCalendar.tsx

@@ -1,34 +1,49 @@
 'use client'
 
-import { useState } from 'react'
+import { useState, useMemo, useCallback } from 'react'
 import { Calendar } from '@/components/ui/calendar'
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
-import { Badge } from '@/components/ui/badge'
-import { d2s, getNow, t2d, getCompletedHabitsForDate } from '@/lib/utils'
+import CompletionCountBadge from '@/components/CompletionCountBadge'
+import { Button } from '@/components/ui/button'
+import { Check, Circle, CircleCheck } from 'lucide-react'
+import { d2s, getNow, t2d, getCompletedHabitsForDate, isHabitDue, getISODate, getCompletionsForToday, getCompletionsForDate } from '@/lib/utils'
 import { useAtom } from 'jotai'
-import { habitsAtom, settingsAtom } from '@/lib/atoms'
+import { useHabits } from '@/hooks/useHabits'
+import { habitsAtom, settingsAtom, completedHabitsMapAtom, hasTasksAtom } from '@/lib/atoms'
 import { DateTime } from 'luxon'
 import Linkify from './linkify'
 import { Habit } from '@/lib/types'
 
 export default function HabitCalendar() {
+  const { completePastHabit } = useHabits()
+
+  const handleCompletePastHabit = useCallback(async (habit: Habit, date: DateTime) => {
+    try {
+      await completePastHabit(habit, date)
+    } catch (error) {
+      console.error('Error completing past habit:', error)
+    }
+  }, [completePastHabit])
   const [settings] = useAtom(settingsAtom)
-  const [selectedDate, setSelectedDate] = useState<DateTime>(getNow({ timezone: settings.system.timezone }))
+  const [selectedDateTime, setSelectedDateTime] = useState<DateTime>(getNow({ timezone: settings.system.timezone }))
+  const selectedDate = selectedDateTime.toFormat("yyyy-MM-dd")
   const [habitsData] = useAtom(habitsAtom)
+  const [hasTasks] = useAtom(hasTasksAtom)
   const habits = habitsData.habits
 
-  const getHabitsForDate = (date: Date) => {
-    return getCompletedHabitsForDate({
-      habits,
-      date: DateTime.fromJSDate(date),
-      timezone: settings.system.timezone
-    })
-  }
+  const [completedHabitsMap] = useAtom(completedHabitsMapAtom)
+
+  // Get completed dates for calendar modifiers
+  const completedDates = useMemo(() => {
+    return new Set(Array.from(completedHabitsMap.keys()).map(date =>
+      getISODate({ dateTime: DateTime.fromISO(date), timezone: settings.system.timezone })
+    ))
+  }, [completedHabitsMap, settings.system.timezone])
 
   return (
-    <div className="container mx-auto px-4 py-8">
-      <h1 className="text-3xl font-bold mb-6">Habit Calendar</h1>
-      <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
+    <div className="container mx-auto px-4 py-6">
+      <h1 className="text-2xl font-semibold mb-6">Habit Calendar</h1>
+      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
         <Card>
           <CardHeader>
             <CardTitle>Calendar</CardTitle>
@@ -36,14 +51,20 @@ export default function HabitCalendar() {
           <CardContent>
             <Calendar
               mode="single"
-              selected={selectedDate.toJSDate()}
-              onSelect={(e) => e && setSelectedDate(DateTime.fromJSDate(e))}
+              selected={selectedDateTime.toJSDate()}
+              onSelect={(e) => e && setSelectedDateTime(DateTime.fromJSDate(e))}
+              weekStartsOn={settings.system.weekStartDay}
               className="rounded-md border"
               modifiers={{
-                completed: (date) => getHabitsForDate(date).length > 0,
+                completed: (date) => completedDates.has(
+                  getISODate({
+                    dateTime: DateTime.fromJSDate(date),
+                    timezone: settings.system.timezone
+                  })!
+                )
               }}
               modifiersClassNames={{
-                completed: 'bg-green-100 text-green-800 font-bold',
+                completed: 'bg-green-100 dark:bg-green-900/30 text-green-800 dark:text-green-300 font-medium rounded-md',
               }}
             />
           </CardContent>
@@ -51,32 +72,135 @@ export default function HabitCalendar() {
         <Card>
           <CardHeader>
             <CardTitle>
-              {selectedDate ? (
-                <>Habits for {d2s({ dateTime: selectedDate, timezone: settings.system.timezone, format: "yyyy-MM-dd" })}</>
+              {selectedDateTime ? (
+                <>{d2s({ dateTime: selectedDateTime, timezone: settings.system.timezone, format: DateTime.DATE_MED_WITH_WEEKDAY })}</>
               ) : (
                 'Select a date'
               )}
             </CardTitle>
           </CardHeader>
           <CardContent>
-            {selectedDate && (
-              <ul className="space-y-2">
-                {habits.map((habit) => {
-                  const isCompleted = getHabitsForDate(selectedDate.toJSDate()).some((h: Habit) => h.id === habit.id)
-                  return (
-                    <li key={habit.id} className="flex items-center justify-between">
-                      <span>
-                        <Linkify>{habit.name}</Linkify>
-                      </span>
-                      {isCompleted ? (
-                        <Badge variant="default">Completed</Badge>
-                      ) : (
-                        <Badge variant="secondary">Not Completed</Badge>
-                      )}
-                    </li>
-                  )
-                })}
-              </ul>
+            {selectedDateTime && (
+              <div className="space-y-8">
+                {hasTasks && (
+                  <div className="pt-2 border-t">
+                    <div className="flex items-center justify-between mb-3">
+                      <h3 className="font-medium text-sm text-muted-foreground uppercase tracking-wide">Tasks</h3>
+                      <CompletionCountBadge type="tasks" date={selectedDate.toString()} />
+                    </div>
+                    <ul className="space-y-3">
+                      {habits
+                        .filter(habit => habit.isTask && isHabitDue({
+                          habit,
+                          timezone: settings.system.timezone,
+                          date: selectedDateTime
+                        }))
+                        .map((habit) => {
+                          const completions = getCompletionsForDate({ habit, date: selectedDateTime, timezone: settings.system.timezone })
+                          const isCompleted = completions >= (habit.targetCompletions || 1)
+                          return (
+                            <li key={habit.id} className="flex items-center justify-between gap-2 px-3 py-2 rounded-lg hover:bg-muted/50 transition-colors">
+                              <span className="flex items-center gap-2">
+                                <Linkify>{habit.name}</Linkify>
+                              </span>
+                              <div className="flex items-center gap-2">
+                                <div className="flex items-center gap-2">
+                                  {habit.targetCompletions && (
+                                    <span className="text-sm text-muted-foreground">
+                                      {completions}/{habit.targetCompletions}
+                                    </span>
+                                  )}
+                                  <button
+                                    onClick={() => handleCompletePastHabit(habit, selectedDateTime)}
+                                    disabled={isCompleted}
+                                    className="relative h-4 w-4 hover:opacity-70 transition-opacity disabled:opacity-100"
+                                  >
+                                    {isCompleted ? (
+                                      <CircleCheck className="h-4 w-4 text-green-500" />
+                                    ) : (
+                                      <div className="relative h-4 w-4">
+                                        <Circle className="absolute h-4 w-4 text-muted-foreground" />
+                                        <div
+                                          className="absolute h-4 w-4 rounded-full overflow-hidden"
+                                          style={{
+                                            background: `conic-gradient(
+                                              currentColor ${(completions / (habit.targetCompletions ?? 1)) * 360}deg,
+                                              transparent ${(completions / (habit.targetCompletions ?? 1)) * 360}deg 360deg
+                                            )`,
+                                            mask: 'radial-gradient(transparent 50%, black 51%)',
+                                            WebkitMask: 'radial-gradient(transparent 50%, black 51%)'
+                                          }}
+                                        />
+                                      </div>
+                                    )}
+                                  </button>
+                                </div>
+                              </div>
+                            </li>
+                          )
+                        })}
+                    </ul>
+                  </div>
+                )}
+                <div>
+                  <div className="flex items-center justify-between mb-3">
+                    <h3 className="font-medium text-sm text-muted-foreground uppercase tracking-wide">Habits</h3>
+                    <CompletionCountBadge type="habits" date={selectedDate.toString()} />
+                  </div>
+                  <ul className="space-y-3">
+                    {habits
+                      .filter(habit => !habit.isTask && isHabitDue({
+                        habit,
+                        timezone: settings.system.timezone,
+                        date: selectedDateTime
+                      }))
+                      .map((habit) => {
+                    const completions = getCompletionsForDate({ habit, date: selectedDateTime, timezone: settings.system.timezone })
+                    const isCompleted = completions >= (habit.targetCompletions || 1)
+                    return (
+                      <li key={habit.id} className="flex items-center justify-between gap-2 px-3 py-2 rounded-lg hover:bg-muted/50 transition-colors">
+                        <span className="flex items-center gap-2">
+                          <Linkify>{habit.name}</Linkify>
+                        </span>
+                        <div className="flex items-center gap-2">
+                          <div className="flex items-center gap-2">
+                            {habit.targetCompletions && (
+                              <span className="text-sm text-muted-foreground">
+                                {completions}/{habit.targetCompletions}
+                              </span>
+                            )}
+                            <button
+                              onClick={() => handleCompletePastHabit(habit, selectedDateTime)}
+                              disabled={isCompleted}
+                              className="relative h-4 w-4 hover:opacity-70 transition-opacity disabled:opacity-100"
+                            >
+                              {isCompleted ? (
+                                <CircleCheck className="h-4 w-4 text-green-500" />
+                              ) : (
+                                <div className="relative h-4 w-4">
+                                  <Circle className="absolute h-4 w-4 text-muted-foreground" />
+                                  <div
+                                    className="absolute h-4 w-4 rounded-full overflow-hidden"
+                                    style={{
+                                      background: `conic-gradient(
+                                        currentColor ${(completions / (habit.targetCompletions ?? 1)) * 360}deg,
+                                        transparent ${(completions / (habit.targetCompletions ?? 1)) * 360}deg 360deg
+                                      )`,
+                                      mask: 'radial-gradient(transparent 50%, black 51%)',
+                                      WebkitMask: 'radial-gradient(transparent 50%, black 51%)'
+                                    }}
+                                  />
+                                </div>
+                              )}
+                            </button>
+                          </div>
+                        </div>
+                      </li>
+                    )
+                    })}
+                  </ul>
+                </div>
+              </div>
             )}
           </CardContent>
         </Card>

components/HabitContextMenuItems.tsx

@@ -0,0 +1,157 @@
+import { Habit } from '@/lib/types';
+import { useHabits } from '@/hooks/useHabits';
+import { useAtom } from 'jotai';
+import { pomodoroAtom, settingsAtom } from '@/lib/atoms';
+import { d2t, getNow, isHabitDueToday } from '@/lib/utils';
+import { DropdownMenuItem, DropdownMenuSeparator } from '@/components/ui/dropdown-menu';
+import { ContextMenuItem, ContextMenuSeparator } from '@/components/ui/context-menu';
+import { Timer, Calendar, Pin, Edit, Archive, ArchiveRestore, Trash2 } from 'lucide-react';
+import { useHelpers } from '@/lib/client-helpers'; // For permission checks if needed, though useHabits handles most
+
+interface HabitContextMenuItemsProps {
+  habit: Habit;
+  onEditRequest: () => void;
+  onDeleteRequest: () => void;
+  context?: 'daily-overview' | 'habit-item';
+  onClose?: () => void; // Optional: To close the dropdown if an action is taken
+}
+
+export function HabitContextMenuItems({
+  habit,
+  onEditRequest,
+  onDeleteRequest,
+  context = 'habit-item',
+  onClose,
+}: HabitContextMenuItemsProps) {
+  const { saveHabit, archiveHabit, unarchiveHabit } = useHabits();
+  const [settings] = useAtom(settingsAtom);
+  const [, setPomo] = useAtom(pomodoroAtom);
+  const { hasPermission } = useHelpers(); // Assuming useHabits handles permissions for its actions
+
+  const canWrite = hasPermission('habit', 'write'); // For UI disabling if not handled by useHabits' actions
+  const canInteract = hasPermission('habit', 'interact');
+
+  const MenuItemComponent = context === 'daily-overview' ? ContextMenuItem : DropdownMenuItem;
+  const MenuSeparatorComponent = context === 'daily-overview' ? ContextMenuSeparator : DropdownMenuSeparator;
+
+  const taskIsDueToday = habit.isTask ? isHabitDueToday({ habit, timezone: settings.system.timezone }) : false;
+
+  const handleAction = (action: () => void) => {
+    action();
+    onClose?.();
+  };
+
+  return (
+    <>
+      {!habit.archived && (
+        <MenuItemComponent
+          disabled={!canInteract}
+          onClick={() => handleAction(() => {
+            setPomo((prev) => ({
+              ...prev,
+              show: true,
+              selectedHabitId: habit.id,
+            }));
+          })}
+        >
+          <Timer className="mr-2 h-4 w-4" />
+          <span>Start Pomodoro</span>
+        </MenuItemComponent>
+      )}
+
+      {/* "Move to Today" option: Show if task is not due today */}
+      {habit.isTask && !habit.archived && !taskIsDueToday && (
+        <MenuItemComponent
+          disabled={!canWrite}
+          onClick={() => handleAction(() => {
+            const today = getNow({ timezone: settings.system.timezone });
+            saveHabit({ ...habit, frequency: d2t({ dateTime: today }) });
+          })}
+        >
+          <Calendar className="mr-2 h-4 w-4" />
+          <span>Move to Today</span>
+        </MenuItemComponent>
+      )}
+
+      {/* "Move to Tomorrow" option: Show if task is due today OR not due today */}
+      {habit.isTask && !habit.archived && (
+        <MenuItemComponent
+          disabled={!canWrite}
+          onClick={() => handleAction(() => {
+            const tomorrow = getNow({ timezone: settings.system.timezone }).plus({ days: 1 });
+            saveHabit({ ...habit, frequency: d2t({ dateTime: tomorrow }) });
+          })}
+        >
+          <Calendar className="mr-2 h-4 w-4" />
+          <span>Move to Tomorrow</span>
+        </MenuItemComponent>
+      )}
+
+      {!habit.archived && (
+        <MenuItemComponent
+          disabled={!canWrite}
+          onClick={() => handleAction(() => saveHabit({ ...habit, pinned: !habit.pinned }))}
+        >
+          <Pin className="mr-2 h-4 w-4" />
+          <span>{habit.pinned ? 'Unpin' : 'Pin'}</span>
+        </MenuItemComponent>
+      )}
+
+      {context === 'habit-item' && !habit.archived && ( // Edit button visible in dropdown only for habit-item context on small screens
+        <MenuItemComponent
+          onClick={() => handleAction(onEditRequest)}
+          className="sm:hidden" // Kept the sm:hidden for HabitItem specific responsive behavior
+          disabled={!canWrite}
+        >
+          <Edit className="mr-2 h-4 w-4" />
+          <span>Edit</span>
+        </MenuItemComponent>
+      )}
+
+      {context === 'daily-overview' && !habit.archived && ( // Edit button always visible in dropdown for daily-overview context
+         <MenuItemComponent
+          onClick={() => handleAction(onEditRequest)}
+          disabled={!canWrite}
+        >
+          <Edit className="mr-2 h-4 w-4" />
+          <span>Edit</span>
+        </MenuItemComponent>
+      )}
+
+
+      {!habit.archived && (
+        <MenuItemComponent
+          disabled={!canWrite}
+          onClick={() => handleAction(() => archiveHabit(habit.id))}
+        >
+          <Archive className="mr-2 h-4 w-4" />
+          <span>Archive</span>
+        </MenuItemComponent>
+      )}
+
+      {habit.archived && (
+        <MenuItemComponent
+          disabled={!canWrite}
+          onClick={() => handleAction(() => unarchiveHabit(habit.id))}
+        >
+          <ArchiveRestore className="mr-2 h-4 w-4" />
+          <span>Unarchive</span>
+        </MenuItemComponent>
+      )}
+      
+      {context === 'habit-item' && !habit.archived && <MenuSeparatorComponent className="sm:hidden" />}
+
+      {(context === 'daily-overview' || habit.archived) && <MenuSeparatorComponent />}
+
+
+      <MenuItemComponent
+        onClick={() => handleAction(onDeleteRequest)}
+        className="text-red-600 focus:text-red-600 dark:text-red-400 dark:focus:text-red-400"
+        disabled={!canWrite} // Assuming delete is a write operation
+      >
+        <Trash2 className="mr-2 h-4 w-4" />
+        <span>Delete</span>
+      </MenuItemComponent>
+    </>
+  );
+}

components/HabitItem.tsx

@@ -1,11 +1,10 @@
-import { Habit } from '@/lib/types'
+import { Habit, SafeUser, User, Permission } from '@/lib/types'
 import { useAtom } from 'jotai'
-import { settingsAtom } from '@/lib/atoms'
-import { getTodayInTimezone, isSameDate, t2d, d2t, getNow, parseNaturalLanguageRRule, parseRRule } from '@/lib/utils'
+import { settingsAtom, pomodoroAtom, browserSettingsAtom, usersAtom } from '@/lib/atoms'
+import { getTodayInTimezone, isSameDate, t2d, d2t, getNow, d2s, getCompletionsForToday, isTaskOverdue, convertMachineReadableFrequencyToHumanReadable } from '@/lib/utils'
 import { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from '@/components/ui/card'
-import ReactMarkdown from 'react-markdown'
 import { Button } from '@/components/ui/button'
-import { Coins, Edit, Trash2, Check, Undo2, MoreVertical } from 'lucide-react'
+import { Coins, Edit, Check, Undo2, MoreVertical, Pin } from 'lucide-react' // Removed unused icons
 import {
   DropdownMenu,
   DropdownMenuContent,
@@ -15,8 +14,11 @@ import {
 } from '@/components/ui/dropdown-menu'
 import { useEffect, useState } from 'react'
 import { useHabits } from '@/hooks/useHabits'
-import { RRule } from 'rrule'
-import { INITIAL_RECURRENCE_RULE } from '@/lib/constants'
+import { INITIAL_RECURRENCE_RULE, RECURRENCE_RULE_MAP } from '@/lib/constants'
+import { DateTime } from 'luxon'
+import { Avatar, AvatarFallback, AvatarImage } from './ui/avatar'
+import { useHelpers } from '@/lib/client-helpers'
+import { HabitContextMenuItems } from './HabitContextMenuItems'
 
 interface HabitItemProps {
   habit: Habit
@@ -24,16 +26,41 @@ interface HabitItemProps {
   onDelete: () => void
 }
 
+const renderUserAvatars = (habit: Habit, currentUser: User | null, usersData: { users: User[] }) => {
+  if (!habit.userIds || habit.userIds.length <= 1) return null;
+  
+  return (
+    <div className="flex -space-x-2 ml-2 flex-shrink-0">
+      {habit.userIds?.filter((u) => u !== currentUser?.id).map(userId => {
+        const user = usersData.users.find(u => u.id === userId)
+        if (!user) return null
+        return (
+          <Avatar key={user.id} className="h-6 w-6">
+            <AvatarImage src={user?.avatarPath && `/api/avatars/${user.avatarPath.split('/').pop()}` || ""} />
+            <AvatarFallback>{user.username[0]}</AvatarFallback>
+          </Avatar>
+        )
+      })}
+    </div>
+  );
+};
+
+
 export default function HabitItem({ habit, onEdit, onDelete }: HabitItemProps) {
-  const { completeHabit, undoComplete } = useHabits()
+  const { completeHabit, undoComplete, archiveHabit, unarchiveHabit, saveHabit } = useHabits()
   const [settings] = useAtom(settingsAtom)
-  const today = getTodayInTimezone(settings.system.timezone)
-  const completionsToday = habit.completions?.filter(completion =>
-    isSameDate(t2d({ timestamp: completion, timezone: settings.system.timezone }), t2d({ timestamp: d2t({ dateTime: getNow({ timezone: settings.system.timezone }) }), timezone: settings.system.timezone }))
-  ).length || 0
+  const [_, setPomo] = useAtom(pomodoroAtom)
+  const completionsToday = getCompletionsForToday({ habit, timezone: settings.system.timezone })
   const target = habit.targetCompletions || 1
   const isCompletedToday = completionsToday >= target
   const [isHighlighted, setIsHighlighted] = useState(false)
+  const [usersData] = useAtom(usersAtom)
+  const { currentUser, hasPermission } = useHelpers()
+  const canWrite = hasPermission('habit', 'write')
+  const canInteract = hasPermission('habit', 'interact')
+  const [browserSettings] = useAtom(browserSettingsAtom)
+  const isTasksView = browserSettings.viewType === 'tasks'
+  const isRecurRule = !isTasksView
 
   useEffect(() => {
     const params = new URLSearchParams(window.location.search)
@@ -57,21 +84,42 @@ export default function HabitItem({ habit, onEdit, onDelete }: HabitItemProps) {
   return (
     <Card
       id={`habit-${habit.id}`}
-      className={`h-full flex flex-col transition-all duration-500 ${isHighlighted ? 'bg-yellow-100 dark:bg-yellow-900' : ''}`}
+      className={`h-full flex flex-col transition-all duration-500 ${isHighlighted ? 'bg-yellow-100 dark:bg-yellow-900' : ''} ${habit.archived ? 'opacity-75' : ''}`}
     >
       <CardHeader className="flex-none">
-        <CardTitle className="line-clamp-1">{habit.name}</CardTitle>
+        <div className="flex justify-between items-start">
+          <CardTitle className={`line-clamp-1 ${habit.archived ? 'text-gray-400 dark:text-gray-500' : ''} flex items-center ${isTasksView ? 'w-full' : ''} justify-between`}>
+            <div className="flex items-center gap-1">
+              {habit.pinned && (
+                <Pin className="h-4 w-4 text-yellow-500" />
+              )}
+              <span>{habit.name}</span>
+            </div>
+            {isTaskOverdue(habit, settings.system.timezone) && (
+              <span className="ml-2 inline-flex items-center rounded-md bg-red-50 dark:bg-red-900/30 px-2 py-1 text-xs font-medium text-red-700 dark:text-red-400 ring-1 ring-inset ring-red-600/10 dark:ring-red-500/20">
+                Overdue
+              </span>
+            )}
+          </CardTitle>
+          {renderUserAvatars(habit, currentUser as User, usersData)}
+        </div>
         {habit.description && (
-          <CardDescription className="whitespace-pre-line">
+          <CardDescription className={`whitespace-pre-line mt-2 ${habit.archived ? 'text-gray-400 dark:text-gray-500' : ''}`}>
             {habit.description}
           </CardDescription>
         )}
       </CardHeader>
       <CardContent className="flex-1">
-        <p className="text-sm text-gray-500">Frequency: {parseRRule(habit.frequency || INITIAL_RECURRENCE_RULE).toText()}</p>
+        <p className={`text-sm ${habit.archived ? 'text-gray-400 dark:text-gray-500' : 'text-gray-500'}`}>
+          When: {convertMachineReadableFrequencyToHumanReadable({
+            frequency: habit.frequency,
+            isRecurRule,
+            timezone: settings.system.timezone
+          })}
+        </p>
         <div className="flex items-center mt-2">
-          <Coins className="h-4 w-4 text-yellow-400 mr-1" />
-          <span className="text-sm font-medium">{habit.coinReward} coins per completion</span>
+          <Coins className={`h-4 w-4 mr-1 ${habit.archived ? 'text-gray-400 dark:text-gray-500' : 'text-yellow-400'}`} />
+          <span className={`text-sm font-medium ${habit.archived ? 'text-gray-400 dark:text-gray-500' : ''}`}>{habit.coinReward} coins per completion</span>
         </div>
       </CardContent>
       <CardFooter className="flex justify-between gap-2">
@@ -81,8 +129,8 @@ export default function HabitItem({ habit, onEdit, onDelete }: HabitItemProps) {
               variant={isCompletedToday ? "secondary" : "default"}
               size="sm"
               onClick={async () => await completeHabit(habit)}
-              disabled={isCompletedToday && completionsToday >= target}
-              className="overflow-hidden w-24 sm:w-auto"
+              disabled={!canInteract || habit.archived || (isCompletedToday && completionsToday >= target)}
+              className={`overflow-hidden w-24 sm:w-auto ${habit.archived ? 'cursor-not-allowed' : ''}`}
             >
               <Check className="h-4 w-4 sm:mr-2" />
               <span>
@@ -114,11 +162,12 @@ export default function HabitItem({ habit, onEdit, onDelete }: HabitItemProps) {
               )}
             </Button>
           </div>
-          {completionsToday > 0 && (
+          {completionsToday > 0 && !habit.archived && (
             <Button
               variant="outline"
               size="sm"
               onClick={async () => await undoComplete(habit)}
+              disabled={!canWrite}
               className="w-10 sm:w-auto"
             >
               <Undo2 className="h-4 w-4" />
@@ -127,15 +176,18 @@ export default function HabitItem({ habit, onEdit, onDelete }: HabitItemProps) {
           )}
         </div>
         <div className="flex gap-2">
-          <Button
-            variant="edit"
-            size="sm"
-            onClick={onEdit}
-            className="hidden sm:flex"
-          >
-            <Edit className="h-4 w-4" />
-            <span className="ml-2">Edit</span>
-          </Button>
+          {!habit.archived && (
+            <Button
+              variant="edit"
+              size="sm"
+              onClick={onEdit}
+              disabled={!canWrite}
+              className="hidden sm:flex"
+            >
+              <Edit className="h-4 w-4" />
+              <span className="ml-2">Edit</span>
+            </Button>
+          )}
           <DropdownMenu>
             <DropdownMenuTrigger asChild>
               <Button variant="ghost" size="sm" className="h-8 w-8 p-0">
@@ -143,18 +195,12 @@ export default function HabitItem({ habit, onEdit, onDelete }: HabitItemProps) {
               </Button>
             </DropdownMenuTrigger>
             <DropdownMenuContent align="end">
-              <DropdownMenuItem onClick={onEdit} className="sm:hidden">
-                <Edit className="mr-2 h-4 w-4" />
-                Edit
-              </DropdownMenuItem>
-              <DropdownMenuSeparator className="sm:hidden" />
-              <DropdownMenuItem
-                className="text-red-600 focus:text-red-600 dark:text-red-400 dark:focus:text-red-400 cursor-pointer"
-                onClick={onDelete}
-              >
-                <Trash2 className="mr-2 h-4 w-4" />
-                Delete
-              </DropdownMenuItem>
+              <HabitContextMenuItems
+                habit={habit}
+                onEditRequest={onEdit}
+                onDeleteRequest={onDelete}
+                context="habit-item"
+              />
             </DropdownMenuContent>
           </DropdownMenu>
         </div>

components/HabitList.tsx

@@ -1,9 +1,9 @@
 'use client'
 
-import { useState } from 'react'
-import { Plus, ListTodo } from 'lucide-react'
+import { useState, useMemo, useEffect } from 'react' // Added useMemo, useEffect
+import { Plus, ArrowUpNarrowWide, ArrowDownWideNarrow, Search } from 'lucide-react' // Added sort icons, Search icon
 import { useAtom } from 'jotai'
-import { habitsAtom, settingsAtom } from '@/lib/atoms'
+import { habitsAtom, settingsAtom, browserSettingsAtom } from '@/lib/atoms'
 import EmptyState from './EmptyState'
 import { Button } from '@/components/ui/button'
 import HabitItem from './HabitItem'
@@ -11,13 +11,109 @@ import AddEditHabitModal from './AddEditHabitModal'
 import ConfirmDialog from './ConfirmDialog'
 import { Habit } from '@/lib/types'
 import { useHabits } from '@/hooks/useHabits'
+import { HabitIcon, TaskIcon } from '@/lib/constants'
+import { ViewToggle } from './ViewToggle'
+import { Input } from '@/components/ui/input' // Added
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select' // Added
+import { Label } from '@/components/ui/label' // Added
+import { DateTime } from 'luxon' // Added
+import { getHabitFreq } from '@/lib/utils' // Added
 
 export default function HabitList() {
   const { saveHabit, deleteHabit } = useHabits()
-  const [habitsData, setHabitsData] = useAtom(habitsAtom)
-  const habits = habitsData.habits
-  const [settings] = useAtom(settingsAtom)
-  const [isModalOpen, setIsModalOpen] = useState(false)
+  const [habitsData] = useAtom(habitsAtom) // setHabitsData removed as it's not used
+  const [browserSettings] = useAtom(browserSettingsAtom)
+  const isTasksView = browserSettings.viewType === 'tasks'
+  // const [settings] = useAtom(settingsAtom); // settingsAtom is not directly used in HabitList itself.
+
+  type SortableField = 'name' | 'coinReward' | 'dueDate' | 'frequency';
+  type SortOrder = 'asc' | 'desc';
+
+  const [searchTerm, setSearchTerm] = useState('');
+  const [sortBy, setSortBy] = useState<SortableField>('name');
+  const [sortOrder, setSortOrder] = useState<SortOrder>('asc');
+
+  useEffect(() => {
+    if (isTasksView && sortBy === 'frequency') {
+      setSortBy('name');
+    } else if (!isTasksView && sortBy === 'dueDate') {
+      setSortBy('name');
+    }
+  }, [isTasksView, sortBy]);
+
+  const compareHabits = useMemo(() => {
+    return (a: Habit, b: Habit, currentSortBy: SortableField, currentSortOrder: SortOrder, tasksView: boolean): number => {
+      let comparison = 0;
+      switch (currentSortBy) {
+        case 'name':
+          comparison = a.name.localeCompare(b.name);
+          break;
+        case 'coinReward':
+          comparison = a.coinReward - b.coinReward;
+          break;
+        case 'dueDate':
+          if (tasksView && a.isTask && b.isTask) {
+            const dateA = DateTime.fromISO(a.frequency);
+            const dateB = DateTime.fromISO(b.frequency);
+            if (dateA.isValid && dateB.isValid) comparison = dateA.toMillis() - dateB.toMillis();
+            else if (dateA.isValid) comparison = -1; // Valid dates first
+            else if (dateB.isValid) comparison = 1;
+            // If both invalid, comparison remains 0
+          }
+          break;
+        case 'frequency':
+          if (!tasksView && !a.isTask && !b.isTask) {
+            const freqOrder = ['daily', 'weekly', 'monthly', 'yearly'];
+            const freqAVal = getHabitFreq(a);
+            const freqBVal = getHabitFreq(b);
+            comparison = freqOrder.indexOf(freqAVal) - freqOrder.indexOf(freqBVal);
+          }
+          break;
+      }
+      return currentSortOrder === 'asc' ? comparison : -comparison;
+    };
+  }, []);
+
+  const allHabitsInView = useMemo(() => {
+    return habitsData.habits.filter(habit =>
+      isTasksView ? habit.isTask : !habit.isTask
+    );
+  }, [habitsData.habits, isTasksView]);
+
+  const searchedHabits = useMemo(() => {
+    if (!searchTerm.trim()) {
+      return allHabitsInView;
+    }
+    const lowercasedSearchTerm = searchTerm.toLowerCase();
+    return allHabitsInView.filter(habit =>
+      habit.name.toLowerCase().includes(lowercasedSearchTerm) ||
+      (habit.description && habit.description.toLowerCase().includes(lowercasedSearchTerm))
+    );
+  }, [allHabitsInView, searchTerm]);
+
+  const activeHabits = useMemo(() => {
+    return searchedHabits
+      .filter(h => !h.archived)
+      .sort((a, b) => {
+        if (a.pinned && !b.pinned) return -1;
+        if (!a.pinned && b.pinned) return 1;
+        // For items in the same pinned group (both pinned or both not pinned), apply general sort
+        return compareHabits(a, b, sortBy, sortOrder, isTasksView);
+      });
+  }, [searchedHabits, sortBy, sortOrder, isTasksView, compareHabits]);
+
+  const archivedHabits = useMemo(() => {
+    return searchedHabits
+      .filter(h => h.archived)
+      .sort((a, b) => compareHabits(a, b, sortBy, sortOrder, isTasksView));
+  }, [searchedHabits, sortBy, sortOrder, isTasksView, compareHabits]);
+  const [modalConfig, setModalConfig] = useState<{
+    isOpen: boolean,
+    isTask: boolean
+  }>({
+    isOpen: false,
+    isTask: false
+  })
   const [editingHabit, setEditingHabit] = useState<Habit | null>(null)
   const [deleteConfirmation, setDeleteConfirmation] = useState<{ isOpen: boolean, habitId: string | null }>({
     isOpen: false,
@@ -28,46 +124,117 @@ export default function HabitList() {
   return (
     <div className="container mx-auto px-4 py-8">
       <div className="flex justify-between items-center mb-6">
-        <h1 className="text-3xl font-bold">My Habits</h1>
-        <Button onClick={() => setIsModalOpen(true)}>
-          <Plus className="mr-2 h-4 w-4" /> Add Habit
-        </Button>
+        <h1 className="text-3xl font-bold">
+          {isTasksView ? 'My Tasks' : 'My Habits'}
+        </h1>
+        <span>
+          <Button className="mr-2" onClick={() => setModalConfig({ isOpen: true, isTask: true })}>
+            <Plus className="mr-2 h-4 w-4" /> {'Add Task'}
+          </Button>
+          <Button onClick={() => setModalConfig({ isOpen: true, isTask: false })}>
+            <Plus className="mr-2 h-4 w-4" /> {'Add Habit'}
+          </Button>
+        </span>
       </div>
+      <div className='py-4'>
+        <ViewToggle />
+      </div>
+
+      {/* Search and Sort Controls */}
+      <div className="flex flex-col sm:flex-row items-center gap-4 my-4">
+        <div className="relative flex-grow w-full sm:w-auto">
+          <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
+            <Search className="h-5 w-5 text-muted-foreground" />
+          </div>
+          <Input
+            type="search"
+            placeholder={`Search ${isTasksView ? 'tasks' : 'habits'}...`}
+            value={searchTerm}
+            onChange={(e) => setSearchTerm(e.target.value)}
+            className="pl-10 w-full"
+          />
+        </div>
+        <div className="flex items-center gap-2 self-start sm:self-center w-full sm:w-auto">
+          <Label htmlFor="sort-by" className="text-sm font-medium whitespace-nowrap sr-only sm:not-sr-only">Sort by:</Label>
+          <Select value={sortBy} onValueChange={(value) => setSortBy(value as SortableField)}>
+            <SelectTrigger id="sort-by" className="w-full sm:w-[180px]">
+              <SelectValue placeholder="Sort by" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="name">Name</SelectItem>
+              <SelectItem value="coinReward">Coin Reward</SelectItem>
+              {isTasksView && <SelectItem value="dueDate">Due Date</SelectItem>}
+              {!isTasksView && <SelectItem value="frequency">Frequency</SelectItem>}
+            </SelectContent>
+          </Select>
+          <Button variant="outline" size="icon" onClick={() => setSortOrder(prev => prev === 'asc' ? 'desc' : 'asc')}>
+            {sortOrder === 'asc' ? <ArrowUpNarrowWide className="h-4 w-4" /> : <ArrowDownWideNarrow className="h-4 w-4" />}
+            <span className="sr-only">Toggle sort order</span>
+          </Button>
+        </div>
+      </div>
+
       <div className="grid grid-cols-1 md:grid-cols-2 gap-4 items-stretch">
-        {habits.length === 0 ? (
+        {activeHabits.length === 0 && searchTerm.trim() ? (
+          <div className="col-span-2 text-center text-muted-foreground py-8">
+            No {isTasksView ? 'tasks' : 'habits'} found matching your search.
+          </div>
+        ) : activeHabits.length === 0 ? (
           <div className="col-span-2">
             <EmptyState
-              icon={ListTodo}
-              title="No habits yet"
-              description="Create your first habit to start tracking your progress"
+              icon={isTasksView ? TaskIcon : HabitIcon}
+              title={isTasksView ? "No tasks yet" : "No habits yet"}
+              description={isTasksView ? "Create your first task to start tracking your progress" : "Create your first habit to start tracking your progress"}
             />
           </div>
         ) : (
-          habits.map((habit) => (
-            <HabitItem
-              key={habit.id}
-              habit={habit}
-              onEdit={() => {
-                setEditingHabit(habit)
-                setIsModalOpen(true)
-              }}
-              onDelete={() => setDeleteConfirmation({ isOpen: true, habitId: habit.id })}
-            />
-          ))
+            activeHabits.map((habit: Habit) => (
+              <HabitItem
+                key={habit.id}
+                habit={habit}
+                onEdit={() => {
+                  setEditingHabit(habit)
+                  setModalConfig({ isOpen: true, isTask: isTasksView })
+                }}
+                onDelete={() => setDeleteConfirmation({ isOpen: true, habitId: habit.id })}
+              />
+            ))
+          )}
+
+        {archivedHabits.length > 0 && (
+          <>
+            <div className="col-span-1 sm:col-span-2 relative flex items-center my-6">
+              <div className="flex-grow border-t border-gray-300 dark:border-gray-600" />
+              <span className="mx-4 text-sm text-gray-500 dark:text-gray-400">Archived</span>
+              <div className="flex-grow border-t border-gray-300 dark:border-gray-600" />
+            </div>
+            {archivedHabits.map((habit: Habit) => (
+              <HabitItem
+                key={habit.id}
+                habit={habit}
+                onEdit={() => {
+                  setEditingHabit(habit)
+                  setModalConfig({ isOpen: true, isTask: isTasksView })
+                }}
+                onDelete={() => setDeleteConfirmation({ isOpen: true, habitId: habit.id })}
+              />
+            ))}
+          </>
         )}
       </div>
-      {isModalOpen &&
+      {modalConfig.isOpen &&
         <AddEditHabitModal
           onClose={() => {
-            setIsModalOpen(false)
+            setModalConfig({ isOpen: false, isTask: false })
             setEditingHabit(null)
           }}
           onSave={async (habit) => {
-            await saveHabit({ ...habit, id: editingHabit?.id })
-            setIsModalOpen(false)
+            await saveHabit({ ...habit, id: editingHabit?.id, isTask: modalConfig.isTask })
+            setModalConfig({ isOpen: false, isTask: false })
             setEditingHabit(null)
           }}
           habit={editingHabit}
+          isTask={modalConfig.isTask}
         />
       }
       <ConfirmDialog
@@ -79,8 +246,8 @@ export default function HabitList() {
           }
           setDeleteConfirmation({ isOpen: false, habitId: null })
         }}
-        title="Delete Habit"
-        message="Are you sure you want to delete this habit? This action cannot be undone."
+        title={isTasksView ? "Delete Task" : "Delete Habit"}
+        message={isTasksView ? "Are you sure you want to delete this task? This action cannot be undone." : "Are you sure you want to delete this habit? This action cannot be undone."}
         confirmText="Delete"
       />
     </div>

components/HabitStreak.tsx

@@ -2,10 +2,10 @@
 
 import { Habit } from '@/lib/types'
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
-import { d2s, getNow, t2d, getCompletedHabitsForDate } from '@/lib/utils'
+import { d2s, getNow, t2d } from '@/lib/utils' // Removed getCompletedHabitsForDate
 import { LineChart, Line, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer } from 'recharts'
 import { useAtom } from 'jotai'
-import { settingsAtom } from '@/lib/atoms'
+import { settingsAtom, hasTasksAtom, completedHabitsMapAtom } from '@/lib/atoms' // Added completedHabitsMapAtom
 
 interface HabitStreakProps {
   habits: Habit[]
@@ -13,6 +13,9 @@ interface HabitStreakProps {
 
 export default function HabitStreak({ habits }: HabitStreakProps) {
   const [settings] = useAtom(settingsAtom)
+  const [hasTasks] = useAtom(hasTasksAtom)
+  const [completedHabitsMap] = useAtom(completedHabitsMapAtom) // Use the atom
+
   // Get the last 7 days of data
   const dates = Array.from({ length: 7 }, (_, i) => {
     const d = getNow({ timezone: settings.system.timezone });
@@ -20,21 +23,24 @@ export default function HabitStreak({ habits }: HabitStreakProps) {
   }).reverse()
 
   const completions = dates.map(date => {
-    const completedCount = getCompletedHabitsForDate({
-      habits,
-      date: t2d({ timestamp: date, timezone: settings.system.timezone }),
-      timezone: settings.system.timezone
-    }).length;
+    // Get completed habits for the date from the map
+    const completedOnDate = completedHabitsMap.get(date) || [];
+
+    // Filter the completed list to count habits and tasks
+    const completedHabitsCount = completedOnDate.filter(h => !h.isTask).length;
+    const completedTasksCount = completedOnDate.filter(h => h.isTask).length;
+
     return {
       date,
-      completed: completedCount
+      habits: completedHabitsCount,
+      tasks: completedTasksCount
     };
   });
 
   return (
     <Card>
       <CardHeader>
-        <CardTitle>Daily Habit Completion Streak</CardTitle>
+        <CardTitle>Daily Completion Streak</CardTitle>
       </CardHeader>
       <CardContent>
         <div className="w-full aspect-[2/1]">
@@ -51,14 +57,25 @@ export default function HabitStreak({ habits }: HabitStreakProps) {
               <CartesianGrid strokeDasharray="3 3" />
               <XAxis dataKey="date" />
               <YAxis />
-              <Tooltip formatter={(value) => [`${value} habits`, 'Completed']} />
+              <Tooltip formatter={(value, name) => [`${value} ${name}`, 'Completed']} />
               <Line
                 type="monotone"
-                dataKey="completed"
+                name="habits"
+                dataKey="habits"
                 stroke="#14b8a6"
                 strokeWidth={2}
                 dot={false}
               />
+              {hasTasks && (
+                <Line
+                  type="monotone"
+                  name="tasks"
+                  dataKey="tasks"
+                  stroke="#f59e0b"
+                  strokeWidth={2}
+                  dot={false}
+                />
+              )}
             </LineChart>
           </ResponsiveContainer>
         </div>

components/Header.tsx

@@ -1,13 +1,14 @@
 'use client'
 
-import { useState } from 'react'
+import { useEffect, useState } from 'react'
 import { useAtom } from 'jotai'
-import { coinsAtom, settingsAtom } from '@/lib/atoms'
+import { coinsAtom, settingsAtom, browserSettingsAtom } from '@/lib/atoms'
 import { useCoins } from '@/hooks/useCoins'
 import { FormattedNumber } from '@/components/FormattedNumber'
-import { Bell, Menu, Settings, User, Info, Coins } from 'lucide-react'
+import { Menu, Settings, User, Info, Coins } from 'lucide-react'
 import { Button } from '@/components/ui/button'
 import { Logo } from '@/components/Logo'
+import NotificationBell from './NotificationBell'
 import {
   DropdownMenu,
   DropdownMenuContent,
@@ -18,6 +19,8 @@ import { Avatar, AvatarFallback, AvatarImage } from '@/components/ui/avatar'
 import AboutModal from './AboutModal'
 import Link from 'next/link'
 import dynamic from 'next/dynamic'
+import { Profile } from './Profile'
+import { useHelpers } from '@/lib/client-helpers'
 
 interface HeaderProps {
   className?: string
@@ -26,9 +29,9 @@ interface HeaderProps {
 const TodayEarnedCoins = dynamic(() => import('./TodayEarnedCoins'), { ssr: false })
 
 export default function Header({ className }: HeaderProps) {
-  const [showAbout, setShowAbout] = useState(false)
   const [settings] = useAtom(settingsAtom)
-  const [coins] = useAtom(coinsAtom)
+  const [browserSettings] = useAtom(browserSettingsAtom)
+  const { balance } = useCoins()
   return (
     <>
       <header className={`border-b bg-white dark:bg-gray-800 shadow-sm ${className || ''}`}>
@@ -42,7 +45,7 @@ export default function Header({ className }: HeaderProps) {
                 <Coins className="h-5 w-5 text-yellow-500 dark:text-yellow-400" />
                 <div className="flex items-baseline gap-1 sm:gap-2">
                   <FormattedNumber
-                    amount={coins.balance}
+                    amount={balance}
                     settings={settings}
                     className="text-gray-800 dark:text-gray-100 font-medium text-lg"
                   />
@@ -51,48 +54,12 @@ export default function Header({ className }: HeaderProps) {
                   </div>
                 </div>
               </Link>
-              <Button variant="ghost" size="icon" aria-label="Notifications">
-                <Bell className="h-5 w-5" />
-              </Button>
-              <DropdownMenu>
-                <DropdownMenuTrigger asChild>
-                  <Button variant="ghost" className="flex items-center gap-2">
-                    {/* <Menu className="h-5 w-5" /> */}
-                    <Avatar className="h-8 w-8">
-                      <AvatarImage src={settings?.profile?.avatarPath ? `/api/avatars/${settings.profile.avatarPath.split('/').pop()}` : '/avatars/default.png'} />
-                      <AvatarFallback>
-                        <User className="h-4 w-4" />
-                      </AvatarFallback>
-                    </Avatar>
-                  </Button>
-                </DropdownMenuTrigger>
-                <DropdownMenuContent align="end" className="w-56 p-2">
-                  <DropdownMenuItem className="cursor-pointer px-3 py-2" asChild>
-                    <Link
-                      href="/settings"
-                      aria-label='settings'
-                      className="flex items-center w-full gap-2"
-                    >
-                      <Settings className="h-4 w-4" />
-                      <span>Settings</span>
-                    </Link>
-                  </DropdownMenuItem>
-                  <DropdownMenuItem className="cursor-pointer px-3 py-2" asChild>
-                    <button
-                      onClick={() => setShowAbout(true)}
-                      className="flex items-center w-full gap-2"
-                    >
-                      <Info className="h-4 w-4" />
-                      <span>About</span>
-                    </button>
-                  </DropdownMenuItem>
-                </DropdownMenuContent>
-              </DropdownMenu>
+              <NotificationBell />
+              <Profile />
             </div>
           </div>
         </div>
       </header>
-      <AboutModal isOpen={showAbout} onClose={() => setShowAbout(false)} />
     </>
   )
 }

components/Logo.tsx

@@ -3,7 +3,7 @@ import { Sparkles } from "lucide-react"
 export function Logo() {
   return (
     <div className="flex items-center gap-2">
-      <Sparkles className="h-6 w-6 text-primary" />
+      {/* <Sparkles className="h-6 w-6 text-primary" /> */}
       <span className="font-bold text-xl">HabitTrove</span>
     </div>
   )

components/Navigation.tsx

@@ -1,15 +1,24 @@
 'use client'
 
 import Link from 'next/link'
-import { Home, Calendar, List, Gift, Coins, Settings, Info } from 'lucide-react'
+import { Home, Calendar, List, Gift, Coins, Settings, Info, CheckSquare } from 'lucide-react'
+import { useAtom } from 'jotai'
+import { browserSettingsAtom } from '@/lib/atoms'
 import { useEffect, useState } from 'react'
 import AboutModal from './AboutModal'
+import { HabitIcon, TaskIcon } from '@/lib/constants'
+import { useHelpers } from '@/lib/client-helpers'
 
 type ViewPort = 'main' | 'mobile'
 
-const navItems = [
+const navItems = (isTasksView: boolean) => [
   { icon: Home, label: 'Dashboard', href: '/', position: 'main' },
-  { icon: List, label: 'Habits', href: '/habits', position: 'main' },
+  {
+    icon: isTasksView ? TaskIcon : HabitIcon,
+    label: isTasksView ? 'Tasks' : 'Habits',
+    href: '/habits',
+    position: 'main'
+  },
   { icon: Calendar, label: 'Calendar', href: '/calendar', position: 'main' },
   { icon: Gift, label: 'Wishlist', href: '/wishlist', position: 'main' },
   { icon: Coins, label: 'Coins', href: '/coins', position: 'main' },
@@ -23,6 +32,9 @@ interface NavigationProps {
 export default function Navigation({ className, viewPort }: NavigationProps) {
   const [showAbout, setShowAbout] = useState(false)
   const [isMobileView, setIsMobileView] = useState(false)
+  const [browserSettings] = useAtom(browserSettingsAtom)
+  const isTasksView = browserSettings.viewType === 'tasks'
+  const { isIOS } = useHelpers()
 
   useEffect(() => {
     const handleResize = () => {
@@ -42,14 +54,14 @@ export default function Navigation({ className, viewPort }: NavigationProps) {
   if (viewPort === 'mobile' && isMobileView) {
     return (
       <>
-        <div className="pb-16" /> {/* Add padding at the bottom to prevent content from being hidden */}
-        <nav className="lg:hidden fixed bottom-0 left-0 right-0 bg-white dark:bg-gray-800 shadow-lg">
-          <div className="flex justify-around">
-            {[...navItems.filter(item => item.position === 'main'), ...navItems.filter(item => item.position === 'bottom')].map((item) => (
+        <div className={isIOS ? "pb-20" : "pb-16"} /> {/* Add padding at the bottom to prevent content from being hidden */}
+        <nav className={`lg:hidden fixed bottom-0 left-0 right-0 bg-white dark:bg-gray-800 shadow-lg ${isIOS ? "pb-4" : ""}`}>
+          <div className="grid grid-cols-5 w-full">
+            {[...navItems(isTasksView).filter(item => item.position === 'main'), ...navItems(isTasksView).filter(item => item.position === 'bottom')].map((item) => (
               <Link
                 key={item.label}
                 href={item.href}
-                className="flex flex-col items-center py-2 text-gray-600 dark:text-gray-300 hover:text-blue-500 dark:hover:text-blue-400"
+                className="flex flex-col items-center justify-center py-2 text-gray-600 dark:text-gray-300 hover:text-blue-500 dark:hover:text-blue-400"
               >
                 <item.icon className="h-6 w-6" />
                 <span className="text-xs mt-1">{item.label}</span>
@@ -69,7 +81,7 @@ export default function Navigation({ className, viewPort }: NavigationProps) {
           <div className="flex flex-col h-0 flex-1 bg-gray-800">
             <div className="flex-1 flex flex-col pt-5 pb-4 overflow-y-auto">
               <nav className="mt-5 flex-1 px-2 space-y-1">
-                {navItems.filter(item => item.position === 'main').map((item) => (
+                {navItems(isTasksView).filter(item => item.position === 'main').map((item) => (
                   <Link
                     key={item.label}
                     href={item.href}

components/NotificationBell.tsx

@@ -0,0 +1,133 @@
+'use client'
+
+import { useMemo } from 'react'
+import { useAtom } from 'jotai'
+import { coinsAtom, habitsAtom, wishlistAtom, usersAtom } from '@/lib/atoms'
+import { Bell } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import NotificationDropdown from './NotificationDropdown';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu'
+import { updateLastNotificationReadTimestamp } from '@/app/actions/data';
+import { d2t, getNow, t2d } from '@/lib/utils';
+import { useHelpers } from '@/lib/client-helpers';
+import { User, CoinTransaction } from '@/lib/types';
+
+export default function NotificationBell() {
+  const { currentUser } = useHelpers();
+  const [coinsData] = useAtom(coinsAtom)
+  const [habitsData] = useAtom(habitsAtom)
+  const [wishlistData] = useAtom(wishlistAtom)
+  const [usersData] = useAtom(usersAtom);
+
+  // --- Calculate Unread and Read Notifications ---
+  const { unreadNotifications, displayedReadNotifications } = useMemo(() => {
+    const unread: CoinTransaction[] = [];
+    const read: CoinTransaction[] = [];
+    const MAX_READ_NOTIFICATIONS = 10; // Limit the number of past notifications shown
+
+    if (!currentUser || !currentUser.id) {
+      return { unreadNotifications: [], displayedReadNotifications: [] };
+    }
+
+    const lastReadTimestamp = currentUser.lastNotificationReadTimestamp
+      ? t2d({ timestamp: currentUser.lastNotificationReadTimestamp, timezone: 'UTC' })
+      : null;
+
+    // Iterate through transactions (assuming they are sorted newest first)
+    for (const tx of coinsData.transactions) {
+      // Stop processing if we have enough read notifications
+      if (read.length >= MAX_READ_NOTIFICATIONS && (!lastReadTimestamp || t2d({ timestamp: tx.timestamp, timezone: 'UTC' }) <= lastReadTimestamp)) {
+        break; // Optimization: stop early if we have enough read and are past the unread ones
+      }
+
+      // Basic checks: must have a related item and be triggered by someone else
+      if (!tx.relatedItemId || tx.userId === currentUser.id) {
+        continue;
+      }
+
+      // Check if the transaction type indicates a notification-worthy event
+      const isRelevantType = tx.type === 'HABIT_COMPLETION' || tx.type === 'TASK_COMPLETION' || tx.type === 'WISH_REDEMPTION';
+      if (!isRelevantType) {
+        continue;
+      }
+
+      // Check if the related item is shared with the current user
+      let isShared = false;
+      const isHabitCompletion = tx.type === 'HABIT_COMPLETION' || tx.type === 'TASK_COMPLETION';
+      const isWishRedemption = tx.type === 'WISH_REDEMPTION';
+
+      if (isHabitCompletion) {
+        const habit = habitsData.habits.find(h => h.id === tx.relatedItemId);
+        if (habit?.userIds?.includes(currentUser.id) && tx.userId && habit.userIds.includes(tx.userId)) {
+          isShared = true;
+        }
+      } else if (isWishRedemption) {
+        const wish = wishlistData.items.find(w => w.id === tx.relatedItemId);
+        if (wish?.userIds?.includes(currentUser.id) && tx.userId && wish.userIds.includes(tx.userId)) {
+          isShared = true;
+        }
+      }
+
+      if (!isShared) {
+        continue; // Skip if not shared
+      }
+
+      // Transaction is relevant, determine if read or unread
+      const txTimestamp = t2d({ timestamp: tx.timestamp, timezone: 'UTC' });
+      if (!lastReadTimestamp || txTimestamp > lastReadTimestamp) {
+        unread.push(tx);
+      } else if (read.length < MAX_READ_NOTIFICATIONS) {
+        // Only add to read if we haven't hit the limit
+        read.push(tx);
+      }
+    }
+
+    // Transactions are assumed to be sorted newest first from the source
+    return { unreadNotifications: unread, displayedReadNotifications: read };
+  }, [coinsData.transactions, habitsData.habits, wishlistData.items, currentUser]);
+  // --- End Calculate Notifications ---
+
+  const unreadCount = unreadNotifications.length;
+
+  const handleNotificationClick = async () => {
+    if (!currentUser || !currentUser.id || unreadCount === 0) return; // Only update if there are unread notifications
+    try {
+      const nowTimestamp = d2t({ dateTime: getNow({}) });
+      await updateLastNotificationReadTimestamp(currentUser.id, nowTimestamp);
+    } catch (error) {
+      console.error("Failed to update notification read timestamp:", error);
+    }
+  };
+
+  return (
+    <DropdownMenu onOpenChange={(open) => {
+      // Update timestamp only when opening the dropdown and there are unread notifications
+      if (open && unreadCount > 0) {
+        handleNotificationClick();
+      }
+    }}>
+      <DropdownMenuTrigger asChild>
+        <Button variant="ghost" size="icon" aria-label="Notifications" className="relative">
+          <Bell className="h-5 w-5" />
+          {unreadCount > 0 && (
+            <span className="absolute top-1 right-1 block h-2 w-2 rounded-full bg-red-500 ring-1 ring-white dark:ring-gray-800" />
+          )}
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end" className="p-0 w-80 md:w-96">
+        <NotificationDropdown
+          currentUser={currentUser as User | null} // Cast needed as useHelpers can return undefined initially
+          unreadNotifications={unreadNotifications}
+          displayedReadNotifications={displayedReadNotifications}
+          habitsData={habitsData} // Pass necessary data down
+          wishlistData={wishlistData}
+          usersData={usersData}
+        />
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}

components/NotificationDropdown.tsx

@@ -0,0 +1,135 @@
+import React from 'react';
+import { ScrollArea } from '@/components/ui/scroll-area';
+import { Separator } from '@/components/ui/separator';
+import { Avatar, AvatarFallback, AvatarImage } from '@/components/ui/avatar';
+import { CoinsData, HabitsData, WishlistData, UserData, User, CoinTransaction } from '@/lib/types';
+import { t2d } from '@/lib/utils';
+import Link from 'next/link';
+import { DropdownMenuItem } from '@/components/ui/dropdown-menu';
+import { Info } from 'lucide-react';
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipProvider,
+  TooltipTrigger,
+} from '@/components/ui/tooltip';
+
+interface NotificationDropdownProps {
+  currentUser: User | null;
+  unreadNotifications: CoinTransaction[];
+  displayedReadNotifications: CoinTransaction[];
+  habitsData: HabitsData; // Keep needed props
+  wishlistData: WishlistData;
+  usersData: UserData;
+}
+
+// Helper function to generate notification message
+const getNotificationMessage = (tx: CoinTransaction, triggeringUser?: User, relatedItemName?: string): string => {
+  const username = triggeringUser?.username || 'Someone';
+  const itemName = relatedItemName || 'a shared item';
+  switch (tx.type) {
+    case 'HABIT_COMPLETION':
+    case 'TASK_COMPLETION':
+      return `${username} completed ${itemName}.`;
+    case 'WISH_REDEMPTION':
+      return `${username} redeemed ${itemName}.`;
+    // Add other relevant transaction types if needed
+    default:
+      return `Activity related to ${itemName} by ${username}.`; // Fallback message
+  }
+};
+
+// Helper function to get the name of the related item
+const getRelatedItemName = (tx: CoinTransaction, habitsData: HabitsData, wishlistData: WishlistData): string | undefined => {
+  if (!tx.relatedItemId) return undefined;
+  if (tx.type === 'HABIT_COMPLETION' || tx.type === 'TASK_COMPLETION') {
+    return habitsData.habits.find(h => h.id === tx.relatedItemId)?.name;
+  }
+  if (tx.type === 'WISH_REDEMPTION') {
+    return wishlistData.items.find(w => w.id === tx.relatedItemId)?.name;
+  }
+  return undefined;
+};
+
+
+export default function NotificationDropdown({
+  currentUser,
+  unreadNotifications, // Use props directly
+  displayedReadNotifications, // Use props directly
+  habitsData,
+  wishlistData,
+  usersData,
+}: NotificationDropdownProps) {
+  if (!currentUser) {
+    return <div className="p-4 text-sm text-gray-500">Not logged in.</div>;
+  }
+
+  // Removed the useMemo block for calculating notifications
+
+  const renderNotification = (tx: CoinTransaction, isUnread: boolean) => {
+    const triggeringUser = usersData.users.find(u => u.id === tx.userId);
+    const relatedItemName = getRelatedItemName(tx, habitsData, wishlistData);
+    const message = getNotificationMessage(tx, triggeringUser, relatedItemName);
+    const txTimestamp = t2d({ timestamp: tx.timestamp, timezone: 'UTC' });
+    const timeAgo = txTimestamp.toRelative(); // e.g., "2 hours ago"
+    // Add the triggering user's ID to the query params if it exists
+    const linkHref = `/coins?highlight=${tx.id}${tx.userId ? `&user=${tx.userId}` : ''}`;
+
+    return (
+      // Wrap the Link with DropdownMenuItem and use asChild to pass props
+      <DropdownMenuItem key={tx.id} asChild className={`p-0 focus:bg-inherit dark:focus:bg-inherit cursor-pointer`}>
+        <Link href={linkHref} className={`block hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors ${isUnread ? 'bg-blue-50 dark:bg-blue-900/20' : ''}`} scroll={true}>
+          <div className="p-3 flex items-start gap-3">
+            <Avatar className="h-8 w-8 mt-1">
+              <AvatarImage src={triggeringUser?.avatarPath ? `/api/avatars/${triggeringUser.avatarPath.split('/').pop()}` : undefined} alt={triggeringUser?.username} />
+              <AvatarFallback>{triggeringUser?.username?.charAt(0).toUpperCase() || '?'}</AvatarFallback>
+            </Avatar>
+            <div className="flex-1">
+              <p className={`text-sm ${isUnread ? 'font-semibold' : ''}`}>{message}</p>
+              <p className="text-xs text-gray-500 dark:text-gray-400">{timeAgo}</p>
+            </div>
+          </div>
+        </Link>
+      </DropdownMenuItem>
+    );
+  };
+
+  return (
+    <TooltipProvider>
+      {/* Removed the outer div as width is now set on DropdownMenuContent in NotificationBell */}
+      <>
+        <div className="p-3 border-b border-gray-200 dark:border-gray-700 flex items-center gap-2">
+          <h4 className="text-sm font-medium">Notifications</h4>
+          <Tooltip>
+            <TooltipTrigger asChild>
+              <Info className="h-4 w-4 text-muted-foreground cursor-help" />
+            </TooltipTrigger>
+            <TooltipContent side="left" className="max-w-xs">
+              <p className="text-xs">
+                Shows completions or redemptions by other users for habits or wishlist that you shared with them (you must be admin)
+              </p>
+            </TooltipContent>
+          </Tooltip>
+        </div>
+        <ScrollArea className="h-[400px]">
+          {unreadNotifications.length === 0 && displayedReadNotifications.length === 0 && (
+            <div className="p-4 text-center text-sm text-gray-500">No notifications yet.</div>
+          )}
+
+          {unreadNotifications.length > 0 && (
+            <>
+              {unreadNotifications.map(tx => renderNotification(tx, true))}
+              {displayedReadNotifications.length > 0 && <Separator className="my-2" />}
+            </>
+          )}
+
+          {displayedReadNotifications.length > 0 && (
+            <>
+              {displayedReadNotifications.map(tx => renderNotification(tx, false))}
+            </>
+          )}
+        </ScrollArea>
+      </> {/* Close the fragment */}
+    </TooltipProvider>
+  );
+}

components/PasswordEntryForm.tsx

@@ -0,0 +1,93 @@
+'use client';
+
+import { Avatar, AvatarFallback, AvatarImage } from './ui/avatar';
+import { Input } from './ui/input';
+import { Button } from './ui/button';
+import { Label } from './ui/label';
+import { User as UserIcon } from 'lucide-react';
+import { Permission, User } from '@/lib/types';
+import { toast } from '@/hooks/use-toast';
+import { useState } from 'react';
+
+interface PasswordEntryFormProps {
+  user: User;
+  onCancel: () => void;
+  onSubmit: (password: string) => Promise<void>;
+  error?: string;
+}
+
+export default function PasswordEntryForm({ 
+  user, 
+  onCancel, 
+  onSubmit,
+  error 
+}: PasswordEntryFormProps) {
+  const hasPassword = !!user.password;
+  const [password, setPassword] = useState('');
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    try {
+      await onSubmit(password);
+    } catch (err) {
+      toast({
+        title: "Error",
+        description: err instanceof Error ? err.message : 'Login failed',
+        variant: "destructive"
+      });
+    }
+  };
+
+  return (
+    <form onSubmit={handleSubmit} className="space-y-6">
+      <div className="flex flex-col items-center gap-4 p-4 bg-muted/50 rounded-lg">
+        <Avatar className="h-24 w-24">
+          <AvatarImage 
+            src={user.avatarPath && `/api/avatars/${user.avatarPath.split('/').pop()}`} 
+          />
+          <AvatarFallback>
+            <UserIcon className="h-12 w-12" />
+          </AvatarFallback>
+        </Avatar>
+        <div className="text-center">
+          <div className="font-medium text-lg">
+            {user.username}
+          </div>
+          <button 
+            type="button"
+            onClick={onCancel}
+            className="text-sm text-blue-500 hover:text-blue-600 mt-1"
+          >
+            Not you?
+          </button>
+        </div>
+      </div>
+
+      {hasPassword && <div className="space-y-4">
+        <div className="space-y-2">
+          <Label htmlFor="password">Password</Label>
+          <Input
+            id="password"
+            type="password"
+            placeholder="Enter password"
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            className={error ? 'border-red-500' : ''}
+          />
+          {error && (
+            <p className="text-sm text-red-500 bg-red-50 dark:bg-red-950/50 p-2 rounded">{error}</p>
+          )}
+        </div>
+      </div>}
+
+      <div className="flex justify-end gap-2 pt-2">
+        <Button type="button" variant="outline" onClick={onCancel}>
+          Cancel
+        </Button>
+        <Button type="submit" disabled={hasPassword && !password}>
+          Login
+        </Button>
+      </div>
+    </form>
+  );
+}

components/PermissionSelector.tsx

@@ -0,0 +1,107 @@
+'use client';
+
+import { Switch } from './ui/switch';
+import { Label } from './ui/label';
+import { Permission } from '@/lib/types';
+
+interface PermissionSelectorProps {
+  permissions: Permission[];
+  isAdmin: boolean;
+  onPermissionsChange: (permissions: Permission[]) => void;
+  onAdminChange: (isAdmin: boolean) => void;
+}
+
+const permissionLabels: { [key: string]: string } = {
+  habit: 'Habit / Task',
+  wishlist: 'Wishlist',
+  coins: 'Coins'
+};
+
+export function PermissionSelector({
+  permissions,
+  isAdmin,
+  onPermissionsChange,
+  onAdminChange,
+}: PermissionSelectorProps) {
+  const currentPermissions = isAdmin ?
+    {
+      habit: { write: true, interact: true },
+      wishlist: { write: true, interact: true },
+      coins: { write: true, interact: true }
+    } :
+    permissions[0] || {
+      habit: { write: false, interact: true },
+      wishlist: { write: false, interact: true },
+      coins: { write: false, interact: true }
+    };
+
+  const handlePermissionChange = (resource: keyof Permission, type: 'write' | 'interact', checked: boolean) => {
+    const newPermissions = [{
+      ...currentPermissions,
+      [resource]: {
+        ...currentPermissions[resource],
+        [type]: checked
+      }
+    }];
+    onPermissionsChange(newPermissions);
+  };
+
+  return (
+    <div className="space-y-4">
+      <div className="space-y-2">
+        <Label>Permissions</Label>
+        <div className="grid grid-cols-1 gap-4">
+          <div className="flex items-center justify-between p-3 rounded-lg border bg-muted/50">
+            <div className="flex items-center gap-2">
+              <div className="font-medium text-sm">Admin Access</div>
+            </div>
+            <Switch
+              id="isAdmin"
+              className="h-4 w-7"
+              checked={isAdmin}
+              onCheckedChange={onAdminChange}
+            />
+          </div>
+
+          {isAdmin ? (
+            <p className="text-xs text-muted-foreground px-3">
+              Admins have full permission to all data for all users
+            </p>
+          ) : (
+            <div className="grid grid-cols-3 gap-4">
+              {['habit', 'wishlist', 'coins'].map((resource) => (
+                <div key={resource} className="p-3 space-y-3 rounded-lg border bg-muted/50">
+                  <div className="font-medium capitalize text-sm border-b pb-2">{permissionLabels[resource]}</div>
+                  <div className="flex flex-col gap-2.5">
+                    <div className="flex flex-col sm:flex-row items-start sm:items-center justify-between gap-2">
+                    <Label htmlFor={`${resource}-write`} className="text-xs text-muted-foreground break-words">Write</Label>
+                      <Switch
+                        id={`${resource}-write`}
+                        className="h-4 w-7"
+                        checked={currentPermissions[resource as keyof Permission].write}
+                        onCheckedChange={(checked) =>
+                          handlePermissionChange(resource as keyof Permission, 'write', checked)
+                        }
+                      />
+                    </div>
+                    <div className="flex flex-col sm:flex-row items-start sm:items-center justify-between gap-2">
+                    <Label htmlFor={`${resource}-interact`} className="text-xs text-muted-foreground break-words">Interact</Label>
+                      <Switch
+                        id={`${resource}-interact`}
+                        className="h-4 w-7"
+                        checked={currentPermissions[resource as keyof Permission].interact}
+                        onCheckedChange={(checked) =>
+                          handlePermissionChange(resource as keyof Permission, 'interact', checked)
+                        }
+                      />
+                    </div>
+                  </div>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}

components/PomodoroTimer.tsx

@@ -148,14 +148,6 @@ export default function PomodoroTimer() {
     }
   }, [state])
 
-
-  const playSound = useCallback(() => {
-    const audio = new Audio('/sounds/timer-end.wav')
-    audio.play().catch(error => {
-      console.error('Error playing sound:', error)
-    })
-  }, [])
-
   const handleTimerEnd = async () => {
     setState("stopped")
     const currentTimerType = currentTimer.current.type
@@ -165,9 +157,6 @@ export default function PomodoroTimer() {
       currentTimer.current.labels[Math.floor(Math.random() * currentTimer.current.labels.length)]
     )
 
-    // Play sound
-    playSound()
-
     // update habits only after focus sessions
     if (selectedHabit && currentTimerType === 'focus') {
       await completeHabit(selectedHabit)
@@ -184,6 +173,16 @@ export default function PomodoroTimer() {
     setTimeLeft(currentTimer.current.duration)
   }
 
+  const skipTimer = () => {
+    currentTimer.current = currentTimer.current.type === 'focus'
+      ? PomoConfigs.break
+      : PomoConfigs.focus
+    resetTimer()
+    setCurrentLabel(
+      currentTimer.current.labels[Math.floor(Math.random() * currentTimer.current.labels.length)]
+    )
+  }
+
   const formatTime = (seconds: number) => {
     const minutes = Math.floor(seconds / 60)
     const secs = seconds % 60
@@ -314,12 +313,7 @@ export default function PomodoroTimer() {
               </Button>
               <Button
                 variant="outline"
-                onClick={() => {
-                  currentTimer.current = currentTimer.current.type === 'focus'
-                    ? PomoConfigs.break
-                    : PomoConfigs.focus
-                  resetTimer()
-                }}
+                onClick={skipTimer}
                 disabled={state === "started"}
                 className="sm:px-4"
               >

components/Profile.tsx

@@ -0,0 +1,192 @@
+'use client'
+
+import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar"
+import { Button } from "@/components/ui/button"
+import { DropdownMenu, DropdownMenuContent, DropdownMenuItem, DropdownMenuTrigger } from "@/components/ui/dropdown-menu"
+import { Settings, Info, User, Moon, Sun, Palette, ArrowRightLeft, LogOut, Crown } from "lucide-react"
+import { Dialog, DialogContent, DialogHeader, DialogTitle } from './ui/dialog'
+import UserForm from './UserForm'
+import Link from "next/link"
+import { useAtom } from "jotai"
+import { settingsAtom, userSelectAtom } from "@/lib/atoms"
+import AboutModal from "./AboutModal"
+import { useEffect, useState } from "react"
+import { useTheme } from "next-themes"
+import { signOut } from "@/app/actions/user"
+import { toast } from "@/hooks/use-toast"
+import { useHelpers } from "@/lib/client-helpers"
+
+export function Profile() {
+  const [settings] = useAtom(settingsAtom)
+  const [userSelect, setUserSelect] = useAtom(userSelectAtom)
+  const [isEditing, setIsEditing] = useState(false)
+  const [showAbout, setShowAbout] = useState(false)
+  const { theme, setTheme } = useTheme()
+  const { currentUser: user } = useHelpers()
+  const [open, setOpen] = useState(false)
+
+  const handleSignOut = async () => {
+    try {
+      await signOut()
+      toast({
+        title: "Signed out successfully",
+        description: "You have been logged out of your account",
+      })
+      setTimeout(() => window.location.reload(), 300);
+    } catch (error) {
+      toast({
+        title: "Error",
+        description: "Failed to sign out",
+        variant: "destructive",
+      })
+    }
+  }
+
+  return (
+    <>
+      <DropdownMenu open={open} onOpenChange={setOpen}>
+        <DropdownMenuTrigger asChild>
+          <Button variant="ghost" className="flex items-center gap-2">
+            <Avatar className="h-8 w-8">
+              <AvatarImage src={user?.avatarPath && `/api/avatars/${user.avatarPath.split('/').pop()}` || ""} />
+              <AvatarFallback>
+                <User className="h-4 w-4" />
+              </AvatarFallback>
+            </Avatar>
+          </Button>
+        </DropdownMenuTrigger>
+        <DropdownMenuContent align="end" className="w-[200px] p-2">
+          <div className="px-2 py-1.5 mb-2 border-b">
+            <div className="flex items-center gap-2">
+              <Avatar className="h-8 w-8">
+                <AvatarImage src={user?.avatarPath && `/api/avatars/${user.avatarPath.split('/').pop()}` || ""} />
+                <AvatarFallback>
+                  <User className="h-4 w-4" />
+                </AvatarFallback>
+              </Avatar>
+              <div className="flex flex-col mr-4">
+                <span className="text-sm font-semibold flex items-center gap-1">
+                  {user?.username || "Guest"}
+                  {user?.isAdmin && <Crown className="h-3 w-3 text-yellow-500" />}
+                </span>
+                {user && (
+                  <button
+                    onClick={(e) => {
+                      e.stopPropagation();
+                      setOpen(false);
+                      setIsEditing(true);
+                    }}
+                    className="text-xs text-muted-foreground hover:text-primary transition-colors text-left"
+                  >
+                    Edit profile
+                  </button>
+                )}
+              </div>
+              {user && (
+                <button
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    setOpen(false);
+                    handleSignOut();
+                  }}
+                  className="border border-primary/50 text-primary rounded-md p-1.5 transition-colors hover:bg-primary/10 hover:border-primary active:scale-95"
+                >
+                  <LogOut className="h-4 w-4" />
+                </button>
+              )}
+            </div>
+          </div>
+
+          <DropdownMenuItem className="cursor-pointer px-2 py-1.5" onClick={() => {
+            setOpen(false);  // Close the dropdown
+            setUserSelect(true);  // Open the user select modal
+          }}>
+            <div className="flex items-center justify-between w-full">
+              <div className="flex items-center gap-2">
+                <ArrowRightLeft className="h-4 w-4" />
+                <span>Switch user</span>
+              </div>
+            </div>
+          </DropdownMenuItem>
+          <DropdownMenuItem className="cursor-pointer px-2 py-1.5" asChild>
+            <Link
+              href="/settings"
+              aria-label='settings'
+              className="flex items-center w-full gap-3"
+            >
+              <Settings className="h-4 w-4" />
+              <span>Settings</span>
+            </Link>
+          </DropdownMenuItem>
+          <DropdownMenuItem className="cursor-pointer px-2 py-1.5" asChild>
+            <button
+              onClick={() => setShowAbout(true)}
+              className="flex items-center w-full gap-3"
+            >
+              <Info className="h-4 w-4" />
+              <span>About</span>
+            </button>
+          </DropdownMenuItem>
+          <DropdownMenuItem className="cursor-pointer px-2 py-1.5">
+            <div className="flex items-center justify-between w-full gap-3">
+              <div className="flex items-center gap-3">
+                <Palette className="h-4 w-4" />
+                <span>Theme</span>
+              </div>
+              <button
+                onClick={(e) => {
+                  e.stopPropagation();
+                  setTheme(theme === 'dark' ? 'light' : 'dark');
+                }}
+                className={`
+                  w-12 h-6 rounded-full relative transition-all duration-300 ease-in-out
+                  hover:scale-105 shadow-inner
+                  ${theme === 'dark'
+                    ? 'bg-blue-600/90 hover:bg-blue-600'
+                    : 'bg-gray-200 hover:bg-gray-300'
+                  }
+                `}
+              >
+                <div className={`
+                  w-5 h-5 rounded-full absolute top-0.5 left-0.5
+                  transition-all duration-300 ease-in-out
+                  shadow-md bg-white
+                  ${theme === 'dark' ? 'translate-x-6' : 'translate-x-0'}
+                `}>
+                  <div className="absolute inset-0 flex items-center justify-center">
+                    {theme === 'dark' ? (
+                      <Moon className="h-3 w-3 text-gray-600" />
+                    ) : (
+                      <Sun className="h-3 w-3 text-gray-600" />
+                    )}
+                  </div>
+                </div>
+              </button>
+            </div>
+          </DropdownMenuItem>
+        </DropdownMenuContent>
+      </DropdownMenu>
+
+      <AboutModal isOpen={showAbout} onClose={() => setShowAbout(false)} />
+
+      {/* Add the UserForm dialog */}
+      {isEditing && user && (
+        <Dialog open={isEditing} onOpenChange={() => setIsEditing(false)}>
+          <DialogContent className="sm:max-w-md">
+            <DialogHeader>
+              <DialogTitle>Edit Profile</DialogTitle>
+            </DialogHeader>
+            <UserForm
+              userId={user.id}
+              onCancel={() => setIsEditing(false)}
+              onSuccess={() => {
+                setIsEditing(false);
+                window.location.reload();
+              }}
+            />
+          </DialogContent>
+        </Dialog>
+      )}
+    </>
+  )
+}

components/UserForm.tsx

@@ -0,0 +1,288 @@
+'use client';
+
+import { useState } from 'react';
+import { passwordSchema, usernameSchema } from '@/lib/zod';
+import { Input } from './ui/input';
+import { Button } from './ui/button';
+import { Label } from './ui/label';
+import { Switch } from './ui/switch';
+import { Permission } from '@/lib/types';
+import { toast } from '@/hooks/use-toast';
+import { useAtom, useAtomValue } from 'jotai';
+import { serverSettingsAtom, usersAtom } from '@/lib/atoms';
+import { createUser, updateUser, updateUserPassword, uploadAvatar } from '@/app/actions/data';
+import { SafeUser, User } from '@/lib/types';
+import { Avatar, AvatarFallback, AvatarImage } from './ui/avatar';
+import { User as UserIcon } from 'lucide-react';
+import _ from 'lodash';
+import { PermissionSelector } from './PermissionSelector';
+import { useHelpers } from '@/lib/client-helpers';
+
+interface UserFormProps {
+  userId?: string;  // if provided, we're editing; if not, we're creating
+  onCancel: () => void;
+  onSuccess: () => void;
+}
+
+export default function UserForm({ userId, onCancel, onSuccess }: UserFormProps) {
+  const [users, setUsersData] = useAtom(usersAtom);
+  const serverSettings = useAtomValue(serverSettingsAtom)
+  const user = userId ? users.users.find(u => u.id === userId) : undefined;
+  const { currentUser } = useHelpers()
+  const getDefaultPermissions = (): Permission[] => [{
+    habit: {
+      write: true,
+      interact: true
+    },
+    wishlist: {
+      write: true,
+      interact: true
+    },
+    coins: {
+      write: true,
+      interact: true
+    }
+  }];
+
+  const [avatarPath, setAvatarPath] = useState(user?.avatarPath)
+  const [username, setUsername] = useState(user?.username || '');
+  const [password, setPassword] = useState<string | undefined>('');
+  const [disablePassword, setDisablePassword] = useState(user?.password === '' || serverSettings.isDemo);
+  const [error, setError] = useState('');
+  const [avatarFile, setAvatarFile] = useState<File | null>(null);
+  const [isAdmin, setIsAdmin] = useState(user?.isAdmin || false);
+  const [permissions, setPermissions] = useState<Permission[]>(
+    user?.permissions || getDefaultPermissions()
+  );
+  const isEditing = !!user;
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+
+    try {
+      // Validate username
+      const usernameResult = usernameSchema.safeParse(username);
+      if (!usernameResult.success) {
+        setError(usernameResult.error.errors[0].message);
+        return;
+      }
+
+      // Validate password unless disabled
+      if (!disablePassword && password) {
+        const passwordResult = passwordSchema.safeParse(password);
+        if (!passwordResult.success) {
+          setError(passwordResult.error.errors[0].message);
+          return;
+        }
+      }
+
+      if (isEditing) {
+        // Update existing user
+        if (username !== user.username || avatarPath !== user.avatarPath || !_.isEqual(permissions, user.permissions) || isAdmin !== user.isAdmin) {
+          await updateUser(user.id, { username, avatarPath, permissions, isAdmin });
+        }
+
+        // Handle password update
+        if (disablePassword) {
+          await updateUserPassword(user.id, undefined);
+        } else if (password) {
+          await updateUserPassword(user.id, password);
+        }
+
+        setUsersData(prev => ({
+          ...prev,
+          users: prev.users.map(u =>
+            u.id === user.id ? { 
+              ...u, 
+              username, 
+              avatarPath, 
+              permissions, 
+              isAdmin,
+              password: disablePassword ? '' : (password || u.password) // use the correct password to update atom
+            } : u
+          ),
+        }));
+
+        toast({
+          title: "User updated",
+          description: `Successfully updated user ${username}`,
+          variant: 'default'
+        });
+      } else {
+        // Create new user
+        const formData = new FormData();
+        formData.append('username', username);
+        if (disablePassword) {
+          formData.append('password', '');
+        } else if (password) {
+          formData.append('password', password);
+        }
+        formData.append('permissions', JSON.stringify(isAdmin ? undefined : permissions));
+        formData.append('isAdmin', JSON.stringify(isAdmin));
+        formData.append('avatarPath', avatarPath || '');
+
+        const newUser = await createUser(formData);
+        setUsersData(prev => ({
+          ...prev,
+          users: [...prev.users, newUser]
+        }));
+
+        toast({
+          title: "User created",
+          description: `Successfully created user ${username}`,
+          variant: 'default'
+        });
+      }
+
+      setPassword('');
+      setError('');
+      onSuccess();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : `Failed to ${isEditing ? 'update' : 'create'} user`);
+    }
+  };
+
+  const handleAvatarChange = async (file: File) => {
+    if (file.size > 5 * 1024 * 1024) {
+      toast({
+        title: "Error",
+        description: "File size must be less than 5MB",
+        variant: 'destructive'
+      });
+      return;
+    }
+
+    const formData = new FormData();
+    formData.append('avatar', file);
+
+    try {
+      const path = await uploadAvatar(formData);
+      setAvatarPath(path);
+      setAvatarFile(null); // Clear the file since we've uploaded it
+      toast({
+        title: "Avatar uploaded",
+        description: "Successfully uploaded avatar",
+        variant: 'default'
+      });
+    } catch (err) {
+      toast({
+        title: "Error",
+        description: "Failed to upload avatar",
+        variant: 'destructive'
+      });
+    }
+  };
+
+  return (
+    <form onSubmit={handleSubmit} className="space-y-6 max-h-[80vh] overflow-y-auto p-4">
+      <div className="flex flex-col items-center gap-4 p-4 bg-muted/50 rounded-lg">
+        <Avatar className="h-24 w-24">
+          <AvatarImage
+            src={avatarPath && `/api/avatars/${avatarPath.split('/').pop()}`}
+            alt={username}
+          />
+          <AvatarFallback>
+            <UserIcon className="h-12 w-12" />
+          </AvatarFallback>
+        </Avatar>
+        <div>
+          <input
+            type="file"
+            id="avatar"
+            name="avatar"
+            accept="image/png, image/jpeg"
+            className="hidden"
+            onChange={(e) => {
+              const file = e.target.files?.[0];
+              if (file) {
+                handleAvatarChange(file);
+              }
+            }}
+          />
+          <Button
+            type="button"
+            variant="secondary"
+            onClick={() => {
+              const input = document.getElementById('avatar') as HTMLInputElement;
+              input.value = ''; // Reset input to allow selecting same file again
+              input.click();
+            }}
+            className="w-full"
+          >
+            {isEditing ? 'Change Avatar' : 'Upload Avatar'}
+          </Button>
+        </div>
+      </div>
+
+      <div className="space-y-4">
+        <div className="space-y-2">
+          <Label htmlFor="username">Username</Label>
+          <Input
+            id="username"
+            type="text"
+            placeholder="Username"
+            value={username}
+            onChange={(e) => setUsername(e.target.value)}
+            className={error ? 'border-red-500' : ''}
+          />
+        </div>
+
+        <div className="space-y-4">
+          <div className="space-y-2">
+            <Label htmlFor="password">
+              {isEditing ? 'New Password' : 'Password'}
+            </Label>
+            <Input
+              id="password"
+              type="password"
+              placeholder={isEditing ? "Leave blank to keep current" : "Enter password"}
+              value={password || ''}
+              onChange={(e) => setPassword(e.target.value)}
+              className={error ? 'border-red-500' : ''}
+              disabled={disablePassword}
+            />
+            {serverSettings.isDemo && (
+              <p className="text-sm text-red-500">Password is automatically disabled in demo instance</p>
+            )}
+          </div>
+          
+          <div className="flex items-center space-x-2">
+            <Switch
+              id="disable-password"
+              checked={disablePassword}
+              onCheckedChange={setDisablePassword}
+              disabled={serverSettings.isDemo}
+            />
+            <Label htmlFor="disable-password">Disable password</Label>
+          </div>
+        </div>
+
+        {error && (
+          <p className="text-sm text-red-500 bg-red-50 dark:bg-red-950/50 p-2 rounded">{error}</p>
+        )}
+
+        
+        {currentUser && currentUser.isAdmin && <PermissionSelector
+          permissions={permissions}
+          isAdmin={isAdmin}
+          onPermissionsChange={setPermissions}
+          onAdminChange={setIsAdmin}
+        />}
+
+      </div>
+
+      <div className="flex justify-end gap-2 pt-2">
+        <Button
+          type="button"
+          variant="outline"
+          onClick={onCancel}
+        >
+          Cancel
+        </Button>
+        <Button type="submit" disabled={!username}>
+          {isEditing ? 'Save Changes' : 'Create User'}
+        </Button>
+      </div>
+    </form>
+  );
+}

components/UserSelectModal.tsx

@@ -0,0 +1,213 @@
+'use client';
+
+import { useState } from 'react';
+import PasswordEntryForm from './PasswordEntryForm';
+import UserForm from './UserForm';
+import { Dialog, DialogContent, DialogHeader, DialogTitle } from './ui/dialog';
+import { Avatar, AvatarFallback, AvatarImage } from './ui/avatar';
+import { Crown, Pencil, Plus, User as UserIcon, UserRoundPen } from 'lucide-react';
+import { Input } from './ui/input';
+import { Button } from './ui/button';
+import { useAtom } from 'jotai';
+import { usersAtom } from '@/lib/atoms';
+import { signIn } from '@/app/actions/user';
+import { createUser } from '@/app/actions/data';
+import { toast } from '@/hooks/use-toast';
+import { Description } from '@radix-ui/react-dialog';
+import { SafeUser, User } from '@/lib/types';
+import { cn } from '@/lib/utils';
+import { useHelpers } from '@/lib/client-helpers';
+
+function UserCard({ 
+  user, 
+  onSelect,
+  onEdit,
+  showEdit,
+  isCurrentUser
+}: {
+  user: User,
+  onSelect: () => void,
+  onEdit: () => void,
+  showEdit: boolean,
+  isCurrentUser: boolean
+}) {
+  return (
+    <div key={user.id} className="relative group">
+      <button
+        onClick={onSelect}
+        className={cn(
+          "flex flex-col items-center gap-2 p-2 rounded-lg hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors w-full",
+          isCurrentUser && "ring-2 ring-primary"
+        )}
+      >
+        <Avatar className="h-16 w-16">
+          <AvatarImage 
+            src={user.avatarPath && `/api/avatars/${user.avatarPath.split('/').pop()}`}
+            alt={user.username} 
+          />
+          <AvatarFallback>
+            <UserIcon className="h-8 w-8" />
+          </AvatarFallback>
+        </Avatar>
+        <span className="text-sm font-medium flex items-center gap-1">
+          {user.username}
+          {user.isAdmin && <Crown className="h-4 w-4 text-yellow-500" />}
+        </span>
+      </button>
+      {showEdit && (
+        <button
+          onClick={(e) => {
+            e.stopPropagation();
+            onEdit();
+          }}
+          className="absolute top-0 right-0 p-1 rounded-full bg-gray-200 hover:bg-gray-300 dark:bg-gray-700 dark:hover:bg-gray-600 transition-colors"
+        >
+          <UserRoundPen className="h-4 w-4" />
+        </button>
+      )}
+    </div>
+  );
+}
+
+function AddUserButton({ onClick }: { onClick: () => void }) {
+  return (
+    <button
+      onClick={onClick}
+      className="flex flex-col items-center gap-2 p-2 rounded-lg hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors"
+    >
+      <Avatar className="h-16 w-16">
+        <AvatarFallback>
+          <Plus className="h-8 w-8" />
+        </AvatarFallback>
+      </Avatar>
+      <span className="text-sm font-medium">Add User</span>
+    </button>
+  );
+}
+
+function UserSelectionView({
+  users,
+  currentUser,
+  onUserSelect,
+  onEditUser,
+  onCreateUser
+}: {
+  users: User[],
+  currentUser?: SafeUser,
+  onUserSelect: (userId: string) => void,
+  onEditUser: (userId: string) => void,
+  onCreateUser: () => void
+}) {
+  return (
+    <div className="grid grid-cols-3 gap-4 p-2 max-h-80 overflow-y-auto">
+      {users
+        .filter(user => user.id !== currentUser?.id)
+        .map((user) => (
+          <UserCard
+            key={user.id}
+            user={user}
+            onSelect={() => onUserSelect(user.id)}
+            onEdit={() => onEditUser(user.id)}
+            showEdit={!!currentUser?.isAdmin}
+            isCurrentUser={false}
+          />
+      ))}
+      {currentUser?.isAdmin && <AddUserButton onClick={onCreateUser} />}
+    </div>
+  );
+}
+
+export default function UserSelectModal({ onClose }: { onClose: () => void }) {
+  const [selectedUser, setSelectedUser] = useState<string>();
+  const [isCreating, setIsCreating] = useState(false);
+  const [isEditing, setIsEditing] = useState(false);
+  const [error, setError] = useState('');
+  const [usersData] = useAtom(usersAtom);
+  const users = usersData.users;
+const {currentUser} = useHelpers();
+
+  const handleUserSelect = (userId: string) => {
+    setSelectedUser(userId);
+    setError('');
+  };
+
+  const handleEditUser = (userId: string) => {
+    setSelectedUser(userId);
+    setIsEditing(true);
+  };
+
+  const handleCreateUser = () => {
+    setIsCreating(true);
+  };
+
+  const handleFormSuccess = () => {
+    setSelectedUser(undefined);
+    setIsCreating(false);
+    setIsEditing(false);
+    onClose();
+  };
+
+  const handleFormCancel = () => {
+    setSelectedUser(undefined);
+    setIsCreating(false);
+    setIsEditing(false);
+    setError('');
+  };
+
+  return (
+    <Dialog open={true} onOpenChange={onClose}>
+      <DialogContent className="sm:max-w-md">
+        <Description></Description>
+        <DialogHeader>
+          <DialogTitle>{isCreating ? 'Create New User' : 'Select User'}</DialogTitle>
+        </DialogHeader>
+
+        <div className="flex flex-col gap-4">
+          {!selectedUser && !isCreating && !isEditing ? (
+            <UserSelectionView
+              users={users}
+              currentUser={currentUser}
+              onUserSelect={handleUserSelect}
+              onEditUser={handleEditUser}
+              onCreateUser={handleCreateUser}
+            />
+          ) : isCreating || isEditing ? (
+            <UserForm
+              userId={isEditing ? selectedUser : undefined}
+              onCancel={handleFormCancel}
+              onSuccess={handleFormSuccess}
+            />
+          ) : (
+            <PasswordEntryForm
+              user={users.find(u => u.id === selectedUser)!}
+              onCancel={() => setSelectedUser(undefined)}
+              onSubmit={async (password) => {
+                try {
+                  setError('');
+                  const user = users.find(u => u.id === selectedUser);
+                  if (!user) throw new Error("User not found");
+                  await signIn(user.username, password);
+                  
+                  setError('');
+                  onClose();
+
+                  toast({
+                    title: "Signed in successfully",
+                    description: `Welcome back, ${user.username}!`,
+                    variant: "default"
+                  });
+
+                  setTimeout(() => window.location.reload(), 300);
+                } catch (err) {
+                  setError('invalid password');
+                  throw err;
+                }
+              }}
+              error={error}
+            />
+          )}
+        </div>
+      </DialogContent>
+    </Dialog>
+  );
+}

components/ViewToggle.tsx

@@ -0,0 +1,77 @@
+'use client'
+
+import { cn } from '@/lib/utils'
+import { useAtom } from 'jotai'
+import { CheckSquare, ListChecks } from 'lucide-react'
+import { browserSettingsAtom, habitsAtom, settingsAtom } from '@/lib/atoms'
+import type { ViewType } from '@/lib/types'
+import { HabitIcon, TaskIcon } from '@/lib/constants'
+import { isHabitDueToday } from '@/lib/utils'
+import { NotificationBadge } from './ui/notification-badge'
+
+interface ViewToggleProps {
+  defaultView?: ViewType
+  className?: string
+}
+
+export function ViewToggle({
+  defaultView = 'habits',
+  className
+}: ViewToggleProps) {
+  const [browserSettings, setBrowserSettings] = useAtom(browserSettingsAtom)
+  const [habits] = useAtom(habitsAtom)
+  const [settings] = useAtom(settingsAtom)
+
+  const handleViewChange = (checked: boolean) => {
+    const newView = checked ? 'tasks' : 'habits'
+    setBrowserSettings({
+      ...browserSettings,
+      viewType: newView,
+    })
+  }
+
+  // Calculate due tasks count
+  const dueTasksCount = habits.habits.filter(habit => 
+    habit.isTask && isHabitDueToday({ habit, timezone: settings.system.timezone })
+  ).length
+
+  return (
+    <div className={cn('inline-flex rounded-full bg-muted/50 h-8', className)}>
+      <div className="relative flex gap-0.5 rounded-full bg-background p-0.5 h-full">
+        <button
+          onClick={() => handleViewChange(false)}
+          className={cn(
+            'relative z-10 rounded-full px-4 py-2 text-sm font-medium transition-colors flex items-center gap-2',
+            browserSettings.viewType === 'habits' ? 'text-primary-foreground' : 'text-muted-foreground hover:text-foreground'
+          )}
+        >
+          <HabitIcon className="h-4 w-4" />
+          <span className="hidden sm:inline">Habits</span>
+        </button>
+        <NotificationBadge 
+          label={dueTasksCount}
+          show={dueTasksCount > 0}
+          variant={browserSettings.viewType === 'tasks' ? 'secondary' : 'default'}
+          className="shadow-md"
+        >
+          <button
+            onClick={() => handleViewChange(true)}
+            className={cn(
+              'relative z-10 rounded-full px-4 py-2 text-sm font-medium transition-colors flex items-center gap-2',
+              browserSettings.viewType === 'tasks' ? 'text-primary-foreground' : 'text-muted-foreground hover:text-foreground'
+            )}
+          >
+            <TaskIcon className="h-4 w-4" />
+            <span className="hidden sm:inline">Tasks</span>
+          </button>
+        </NotificationBadge>
+        <div
+          className={cn(
+            'absolute left-0.5 top-0.5 h-[calc(100%-0.25rem)] rounded-full bg-primary transition-transform',
+            browserSettings.viewType === 'habits' ? 'w-[calc(50%-0.125rem)]' : 'w-[calc(50%-0.125rem)] translate-x-[calc(100%+0.125rem)]'
+          )}
+        />
+      </div>
+    </div>
+  )
+}

components/WishlistItem.tsx

@@ -1,8 +1,12 @@
-import { WishlistItemType } from '@/lib/types'
+import { WishlistItemType, User, Permission } from '@/lib/types'
+import { useAtom } from 'jotai'
+import { usersAtom } from '@/lib/atoms'
+import { Avatar, AvatarFallback, AvatarImage } from './ui/avatar'
+import { useHelpers } from '@/lib/client-helpers'
 import { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from '@/components/ui/card'
 import ReactMarkdown from 'react-markdown'
 import { Button } from '@/components/ui/button'
-import { Coins, Edit, Trash2, Gift, MoreVertical } from 'lucide-react'
+import { Coins, Edit, Trash2, Gift, MoreVertical, Archive, ArchiveRestore } from 'lucide-react'
 import {
   DropdownMenu,
   DropdownMenuContent,
@@ -16,39 +20,84 @@ interface WishlistItemProps {
   onEdit: () => void
   onDelete: () => void
   onRedeem: () => void
+  onArchive: () => void
+  onUnarchive: () => void
   canRedeem: boolean
   isHighlighted?: boolean
   isRecentlyRedeemed?: boolean
+  isArchived?: boolean
 }
 
+const renderUserAvatars = (item: WishlistItemType, currentUser: User | null, usersData: { users: User[] }) => {
+  if (!item.userIds || item.userIds.length <= 1) return null;
+  
+  return (
+    <div className="flex -space-x-2 ml-2 flex-shrink-0">
+      {item.userIds?.filter((u) => u !== currentUser?.id).map(userId => {
+        const user = usersData.users.find(u => u.id === userId)
+        if (!user) return null
+        return (
+          <Avatar key={user.id} className="h-6 w-6">
+            <AvatarImage src={user?.avatarPath && `/api/avatars/${user.avatarPath.split('/').pop()}` || ""} />
+            <AvatarFallback>{user.username[0]}</AvatarFallback>
+          </Avatar>
+        )
+      })}
+    </div>
+  );
+};
+
 export default function WishlistItem({
   item,
   onEdit,
   onDelete,
   onRedeem,
+  onArchive,
+  onUnarchive,
   canRedeem,
   isHighlighted,
   isRecentlyRedeemed
 }: WishlistItemProps) {
+  const { currentUser, hasPermission } = useHelpers()
+  const canWrite = hasPermission('wishlist', 'write')
+  const canInteract = hasPermission('wishlist', 'interact')
+  const [usersData] = useAtom(usersAtom)
+  
   return (
     <Card
       id={`wishlist-${item.id}`}
       className={`h-full flex flex-col transition-all duration-500 ${isHighlighted ? 'bg-yellow-100 dark:bg-yellow-900' : ''
         } ${isRecentlyRedeemed ? 'animate-[celebrate_1s_ease-in-out] shadow-lg ring-2 ring-primary' : ''
-        }`}
+        } ${item.archived ? 'opacity-75' : ''}`}
     >
       <CardHeader className="flex-none">
-        <CardTitle className="line-clamp-1">{item.name}</CardTitle>
-        {item.description && (
-          <CardDescription className="whitespace-pre-line">
-            {item.description}
-          </CardDescription>
-        )}
+        <div className="flex items-center gap-2">
+          <CardTitle className={`line-clamp-1 ${item.archived ? 'text-gray-400 dark:text-gray-500' : ''}`}>
+            {item.name}
+          </CardTitle>
+          {item.targetCompletions && (
+            <span className="text-sm text-gray-500 dark:text-gray-400">
+              ({item.targetCompletions} {item.targetCompletions === 1 ? 'use' : 'uses'} left)
+            </span>
+          )}
+        </div>
+        <div className="flex items-center justify-between">
+          <div className="flex-1">
+            {item.description && (
+              <CardDescription className={`whitespace-pre-line ${item.archived ? 'text-gray-400 dark:text-gray-500' : ''}`}>
+                {item.description}
+              </CardDescription>
+            )}
+          </div>
+          {renderUserAvatars(item, currentUser as User, usersData)}
+        </div>
       </CardHeader>
       <CardContent className="flex-1">
-        <div className="flex items-center">
-          <Coins className="h-4 w-4 text-yellow-400 mr-1" />
-          <span className="text-sm font-medium">{item.coinCost} coins</span>
+        <div className="flex items-center gap-2">
+          <Coins className={`h-4 w-4 ${item.archived ? 'text-gray-400 dark:text-gray-500' : 'text-yellow-400'}`} />
+          <span className={`text-sm font-medium ${item.archived ? 'text-gray-400 dark:text-gray-500' : ''}`}>
+            {item.coinCost} coins
+          </span>
         </div>
       </CardContent>
       <CardFooter className="flex justify-between gap-2">
@@ -57,8 +106,8 @@ export default function WishlistItem({
             variant={canRedeem ? "default" : "secondary"}
             size="sm"
             onClick={onRedeem}
-            disabled={!canRedeem}
-            className={`transition-all duration-300 w-24 sm:w-auto ${isRecentlyRedeemed ? 'bg-green-500 hover:bg-green-600' : ''}`}
+            disabled={!canRedeem || !canInteract || item.archived}
+            className={`transition-all duration-300 w-24 sm:w-auto ${isRecentlyRedeemed ? 'bg-green-500 hover:bg-green-600' : ''} ${item.archived ? 'cursor-not-allowed' : ''}`}
           >
             <Gift className={`h-4 w-4 sm:mr-2 ${isRecentlyRedeemed ? 'animate-spin' : ''}`} />
             <span>
@@ -77,15 +126,18 @@ export default function WishlistItem({
           </Button>
         </div>
         <div className="flex gap-2">
-          <Button
-            variant="edit"
-            size="sm"
-            onClick={onEdit}
-            className="hidden sm:flex"
-          >
-            <Edit className="h-4 w-4" />
-            <span className="ml-2">Edit</span>
-          </Button>
+          {!item.archived && (
+            <Button
+              variant="edit"
+              size="sm"
+              onClick={onEdit}
+              disabled={!canWrite}
+              className="hidden sm:flex"
+            >
+              <Edit className="h-4 w-4" />
+              <span className="ml-2">Edit</span>
+            </Button>
+          )}
           <DropdownMenu>
             <DropdownMenuTrigger asChild>
               <Button variant="ghost" size="sm" className="h-8 w-8 p-0">
@@ -93,6 +145,18 @@ export default function WishlistItem({
               </Button>
             </DropdownMenuTrigger>
             <DropdownMenuContent align="end">
+              {!item.archived && (
+                <DropdownMenuItem disabled={!canWrite} onClick={onArchive}>
+                  <Archive className="mr-2 h-4 w-4" />
+                  <span>Archive</span>
+                </DropdownMenuItem>
+              )}
+              {item.archived && (
+                <DropdownMenuItem disabled={!canWrite} onClick={onUnarchive}>
+                  <ArchiveRestore className="mr-2 h-4 w-4" />
+                  <span>Unarchive</span>
+                </DropdownMenuItem>
+              )}
               <DropdownMenuItem onClick={onEdit} className="sm:hidden">
                 <Edit className="mr-2 h-4 w-4" />
                 Edit
@@ -101,6 +165,7 @@ export default function WishlistItem({
               <DropdownMenuItem
                 className="text-red-600 focus:text-red-600 dark:text-red-400 dark:focus:text-red-400 cursor-pointer"
                 onClick={onDelete}
+                disabled={!canWrite}
               >
                 <Trash2 className="mr-2 h-4 w-4" />
                 Delete

components/WishlistManager.tsx

@@ -9,6 +9,8 @@ import WishlistItem from './WishlistItem'
 import AddEditWishlistItemModal from './AddEditWishlistItemModal'
 import ConfirmDialog from './ConfirmDialog'
 import { WishlistItemType } from '@/lib/types'
+import { openWindow } from '@/lib/utils'
+import { toast } from '@/hooks/use-toast'
 
 export default function WishlistManager() {
   const {
@@ -16,10 +18,15 @@ export default function WishlistManager() {
     editWishlistItem,
     deleteWishlistItem,
     redeemWishlistItem,
+    archiveWishlistItem,
+    unarchiveWishlistItem,
     canRedeem,
     wishlistItems
   } = useWishlist()
 
+  const activeItems = wishlistItems.filter(item => !item.archived)
+  const archivedItems = wishlistItems.filter(item => item.archived)
+
   const [highlightedItemId, setHighlightedItemId] = useState<string | null>(null)
   const [recentlyRedeemedId, setRecentlyRedeemedId] = useState<string | null>(null)
   const [isModalOpen, setIsModalOpen] = useState(false)
@@ -57,6 +64,19 @@ export default function WishlistManager() {
       setTimeout(() => {
         setRecentlyRedeemedId(null)
       }, 3000)
+      
+      if (item.link) {
+        setTimeout(() => {
+          const opened = openWindow(item.link!)
+          if (!opened) {
+            toast({
+              title: "Popup Blocked",
+              description: "Please allow popups to open the link",
+              variant: "destructive"
+            })
+          }
+        }, 300)
+      }
     }
   }
 
@@ -68,9 +88,9 @@ export default function WishlistManager() {
           <Plus className="mr-2 h-4 w-4" /> Add Reward
         </Button>
       </div>
-      <div className="grid grid-cols-1 md:grid-cols-2 gap-4 items-stretch">
-        {wishlistItems.length === 0 ? (
-          <div className="col-span-2">
+      <div className="grid grid-cols-1 lg:grid-cols-2 gap-4 items-stretch">
+        {activeItems.length === 0 ? (
+          <div className="col-span-1 lg:col-span-2">
             <EmptyState
               icon={Gift}
               title="Your wishlist is empty"
@@ -78,7 +98,7 @@ export default function WishlistManager() {
             />
           </div>
         ) : (
-          wishlistItems.map((item) => (
+          activeItems.map((item) => (
             <div
               key={item.id}
               ref={(el) => {
@@ -97,28 +117,46 @@ export default function WishlistManager() {
                 }}
                 onDelete={() => setDeleteConfirmation({ isOpen: true, itemId: item.id })}
                 onRedeem={() => handleRedeem(item)}
+                onArchive={() => archiveWishlistItem(item.id)}
+                onUnarchive={() => unarchiveWishlistItem(item.id)}
                 canRedeem={canRedeem(item.coinCost)}
               />
             </div>
           ))
         )}
+        
+        {archivedItems.length > 0 && (
+          <>
+            <div className="col-span-1 lg:col-span-2 relative flex items-center my-6">
+              <div className="flex-grow border-t border-gray-300 dark:border-gray-600" />
+              <span className="mx-4 text-sm text-gray-500 dark:text-gray-400">Archived</span>
+              <div className="flex-grow border-t border-gray-300 dark:border-gray-600" />
+            </div>
+            {archivedItems.map((item) => (
+              <WishlistItem
+                key={item.id}
+                item={item}
+                onEdit={() => {
+                  setEditingItem(item)
+                  setIsModalOpen(true)
+                }}
+                onDelete={() => setDeleteConfirmation({ isOpen: true, itemId: item.id })}
+                onRedeem={() => handleRedeem(item)}
+                onArchive={() => archiveWishlistItem(item.id)}
+                onUnarchive={() => unarchiveWishlistItem(item.id)}
+                canRedeem={canRedeem(item.coinCost)}
+              />
+            ))}
+          </>
+        )}
       </div>
       <AddEditWishlistItemModal
         isOpen={isModalOpen}
-        onClose={() => {
-          setIsModalOpen(false)
-          setEditingItem(null)
-        }}
-        onSave={(item) => {
-          if (editingItem) {
-            editWishlistItem({ ...item, id: editingItem.id })
-          } else {
-            addWishlistItem(item)
-          }
-          setIsModalOpen(false)
-          setEditingItem(null)
-        }}
-        item={editingItem}
+        setIsOpen={setIsModalOpen}
+        editingItem={editingItem}
+        setEditingItem={setEditingItem}
+        addWishlistItem={addWishlistItem}
+        editWishlistItem={editWishlistItem}
       />
       <ConfirmDialog
         isOpen={deleteConfirmation.isOpen}

components/calendar.tsx

@@ -1,65 +0,0 @@
-"use client"
-
-import * as React from "react"
-import { ChevronLeft, ChevronRight } from 'lucide-react'
-import { DayPicker } from "react-day-picker"
-
-import { cn } from "@/lib/utils"
-import { buttonVariants } from "@/components/ui/button"
-
-export type CalendarProps = React.ComponentProps<typeof DayPicker>
-
-function Calendar({
-  className,
-  classNames,
-  showOutsideDays = true,
-  ...props
-}: CalendarProps) {
-  return (
-    <DayPicker
-      showOutsideDays={showOutsideDays}
-      className={cn("p-3", className)}
-      classNames={{
-        months: "flex flex-col sm:flex-row space-y-4 sm:space-x-4 sm:space-y-0",
-        month: "space-y-4",
-        caption: "flex justify-center pt-1 relative items-center",
-        caption_label: "text-sm font-medium",
-        nav: "space-x-1 flex items-center",
-        nav_button: cn(
-          buttonVariants({ variant: "outline" }),
-          "h-7 w-7 bg-transparent p-0 opacity-50 hover:opacity-100"
-        ),
-        nav_button_previous: "absolute left-1",
-        nav_button_next: "absolute right-1",
-        table: "w-full border-collapse space-y-1",
-        head_row: "flex",
-        head_cell:
-          "text-muted-foreground rounded-md w-9 font-normal text-[0.8rem]",
-        row: "flex w-full mt-2",
-        cell: "text-center text-sm p-0 relative [&:has([aria-selected])]:bg-accent first:[&:has([aria-selected])]:rounded-l-md last:[&:has([aria-selected])]:rounded-r-md focus-within:relative focus-within:z-20",
-        day: cn(
-          buttonVariants({ variant: "ghost" }),
-          "h-9 w-9 p-0 font-normal aria-selected:opacity-100"
-        ),
-        day_selected:
-          "bg-primary text-primary-foreground hover:bg-primary hover:text-primary-foreground focus:bg-primary focus:text-primary-foreground",
-        day_today: "bg-accent text-accent-foreground",
-        day_outside: "text-muted-foreground opacity-50",
-        day_disabled: "text-muted-foreground opacity-50",
-        day_range_middle:
-          "aria-selected:bg-accent aria-selected:text-accent-foreground",
-        day_hidden: "invisible",
-        ...classNames,
-      }}
-      components={{
-        IconLeft: ({ ...props }) => <ChevronLeft className="h-4 w-4" />,
-        IconRight: ({ ...props }) => <ChevronRight className="h-4 w-4" />,
-      }}
-      {...props}
-    />
-  )
-}
-Calendar.displayName = "Calendar"
-
-export { Calendar }
-

components/jotai-hydrate.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import { settingsAtom, habitsAtom, coinsAtom, wishlistAtom } from "@/lib/atoms"
+import { settingsAtom, habitsAtom, coinsAtom, wishlistAtom, usersAtom, serverSettingsAtom } from "@/lib/atoms"
 import { useHydrateAtoms } from "jotai/utils"
 import { JotaiHydrateInitialValues } from "@/lib/types"
 
@@ -12,7 +12,9 @@ export function JotaiHydrate({
     [settingsAtom, initialValues.settings],
     [habitsAtom, initialValues.habits],
     [coinsAtom, initialValues.coins],
-    [wishlistAtom, initialValues.wishlist]
+    [wishlistAtom, initialValues.wishlist],
+    [usersAtom, initialValues.users],
+    [serverSettingsAtom, initialValues.serverSettings]
   ])
   return children
 }

components/theme-provider.tsx

@@ -0,0 +1,11 @@
+"use client"
+
+import * as React from "react"
+import { ThemeProvider as NextThemesProvider } from "next-themes"
+
+export function ThemeProvider({
+  children,
+  ...props
+}: React.ComponentProps<typeof NextThemesProvider>) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>
+}

components/theme-toggle.tsx

@@ -0,0 +1,40 @@
+"use client"
+
+import * as React from "react"
+import { Moon, MoonIcon, Sun } from "lucide-react"
+import { useTheme } from "next-themes"
+
+import { Button } from "@/components/ui/button"
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu"
+
+export function ThemeToggle() {
+  const { setTheme } = useTheme()
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button variant="outline" size="icon">
+          <Sun className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
+          <Moon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
+          <span className="sr-only">Toggle theme</span>
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end">
+        <DropdownMenuItem onClick={() => setTheme("light")}>
+          Light
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setTheme("dark")}>
+          Dark
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setTheme("system")}>
+          System
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  )
+}

components/ui/notification-badge.tsx

@@ -0,0 +1,41 @@
+import React from 'react';
+import {Badge, BadgeProps} from './badge';
+import {cn} from '@/lib/utils';
+
+export interface NotificationBadgeProps extends BadgeProps {
+  label?: string | number;
+  show?: boolean;
+  variant?: 'destructive' | 'default' | 'secondary';
+}
+
+export const NotificationBadge = ({
+  label,
+  className,
+  show,
+  variant = 'destructive',
+  children,
+  ...props
+}: NotificationBadgeProps) => {
+  const showBadge =
+    typeof label !== 'undefined' && (typeof show === 'undefined' || show);
+  return (
+    <div className='inline-flex relative'>
+      {children}
+      {showBadge && (
+        <Badge
+          variant={variant}
+          className={cn(
+            'absolute rounded-full -top-1.5 -right-1.5 z-20 border h-4 w-4 p-0 flex items-center justify-center text-xs',
+            typeof label !== 'undefined' && ('' + label).length === 0
+              ? ''
+              : 'min-w-[1rem]',
+            className
+          )}
+          {...props}
+        >
+          {'' + label}
+        </Badge>
+      )}
+    </div>
+  );
+};

components/ui/scroll-area.tsx

@@ -0,0 +1,48 @@
+"use client"
+
+import * as React from "react"
+import * as ScrollAreaPrimitive from "@radix-ui/react-scroll-area"
+
+import { cn } from "@/lib/utils"
+
+const ScrollArea = React.forwardRef<
+  React.ElementRef<typeof ScrollAreaPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof ScrollAreaPrimitive.Root>
+>(({ className, children, ...props }, ref) => (
+  <ScrollAreaPrimitive.Root
+    ref={ref}
+    className={cn("relative overflow-hidden", className)}
+    {...props}
+  >
+    <ScrollAreaPrimitive.Viewport className="h-full w-full rounded-[inherit]">
+      {children}
+    </ScrollAreaPrimitive.Viewport>
+    <ScrollBar />
+    <ScrollAreaPrimitive.Corner />
+  </ScrollAreaPrimitive.Root>
+))
+ScrollArea.displayName = ScrollAreaPrimitive.Root.displayName
+
+const ScrollBar = React.forwardRef<
+  React.ElementRef<typeof ScrollAreaPrimitive.ScrollAreaScrollbar>,
+  React.ComponentPropsWithoutRef<typeof ScrollAreaPrimitive.ScrollAreaScrollbar>
+>(({ className, orientation = "vertical", ...props }, ref) => (
+  <ScrollAreaPrimitive.ScrollAreaScrollbar
+    ref={ref}
+    orientation={orientation}
+    className={cn(
+      "flex touch-none select-none transition-colors",
+      orientation === "vertical" &&
+        "h-full w-2.5 border-l border-l-transparent p-[1px]",
+      orientation === "horizontal" &&
+        "h-2.5 flex-col border-t border-t-transparent p-[1px]",
+      className
+    )}
+    {...props}
+  >
+    <ScrollAreaPrimitive.ScrollAreaThumb className="relative flex-1 rounded-full bg-border" />
+  </ScrollAreaPrimitive.ScrollAreaScrollbar>
+))
+ScrollBar.displayName = ScrollAreaPrimitive.ScrollAreaScrollbar.displayName
+
+export { ScrollArea, ScrollBar }

components/ui/separator.tsx

@@ -0,0 +1,31 @@
+"use client"
+
+import * as React from "react"
+import * as SeparatorPrimitive from "@radix-ui/react-separator"
+
+import { cn } from "@/lib/utils"
+
+const Separator = React.forwardRef<
+  React.ElementRef<typeof SeparatorPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof SeparatorPrimitive.Root>
+>(
+  (
+    { className, orientation = "horizontal", decorative = true, ...props },
+    ref
+  ) => (
+    <SeparatorPrimitive.Root
+      ref={ref}
+      decorative={decorative}
+      orientation={orientation}
+      className={cn(
+        "shrink-0 bg-border",
+        orientation === "horizontal" ? "h-[1px] w-full" : "h-full w-[1px]",
+        className
+      )}
+      {...props}
+    />
+  )
+)
+Separator.displayName = SeparatorPrimitive.Root.displayName
+
+export { Separator }

docker-compose.yaml

@@ -3,5 +3,8 @@ services:
     ports:
       - "3000:3000"
     volumes:
-      - "./data:/app/data" # Use a relative path instead of $(pwd)
+      - "./data:/app/data"
+      - "./backups:/app/backups"
     image: dohsimpson/habittrove
+    environment:
+      - AUTH_SECRET=your-secret-key-here # Replace with your actual secret

hooks/useCoins.tsx

@@ -1,18 +1,63 @@
 import { useAtom } from 'jotai'
+import { calculateCoinsEarnedToday, calculateCoinsSpentToday, calculateTotalEarned, calculateTotalSpent, calculateTransactionsToday, checkPermission } from '@/lib/utils'
 import {
   coinsAtom,
   coinsEarnedTodayAtom,
   totalEarnedAtom,
   totalSpentAtom,
   coinsSpentTodayAtom,
-  transactionsTodayAtom
+  transactionsTodayAtom,
+  coinsBalanceAtom,
+  settingsAtom,
+  usersAtom,
 } from '@/lib/atoms'
 import { addCoins, removeCoins, saveCoinsData } from '@/app/actions/data'
-import { CoinsData } from '@/lib/types'
+import { CoinsData, User } from '@/lib/types'
 import { toast } from '@/hooks/use-toast'
+import { useHelpers } from '@/lib/client-helpers'
 
-export function useCoins() {
+function handlePermissionCheck(
+  user: User | undefined,
+  resource: 'habit' | 'wishlist' | 'coins',
+  action: 'write' | 'interact'
+): boolean {
+  if (!user) {
+    toast({
+      title: "Authentication Required",
+      description: "Please sign in to continue.",
+      variant: "destructive",
+    })
+    return false
+  }
+
+  if (!user.isAdmin && !checkPermission(user.permissions, resource, action)) {
+    toast({
+      title: "Permission Denied",
+      description: `You don't have ${action} permission for ${resource}s.`,
+      variant: "destructive",
+    })
+    return false
+  }
+
+  return true
+}
+
+export function useCoins(options?: { selectedUser?: string }) {
   const [coins, setCoins] = useAtom(coinsAtom)
+  const [settings] = useAtom(settingsAtom)
+  const [users] = useAtom(usersAtom)
+  const { currentUser } = useHelpers()
+  let user: User | undefined;
+  if (!options?.selectedUser) {
+    user = currentUser;
+  } else {
+    user = users.users.find(u => u.id === options.selectedUser)
+  }
+
+  // Filter transactions for the selectd user
+  const transactions = coins.transactions.filter(t => t.userId === user?.id)
+
+  const [balance] = useAtom(coinsBalanceAtom)
   const [coinsEarnedToday] = useAtom(coinsEarnedTodayAtom)
   const [totalEarned] = useAtom(totalEarnedAtom)
   const [totalSpent] = useAtom(totalSpentAtom)
@@ -20,6 +65,7 @@ export function useCoins() {
   const [transactionsToday] = useAtom(transactionsTodayAtom)
 
   const add = async (amount: number, description: string, note?: string) => {
+    if (!handlePermissionCheck(currentUser, 'coins', 'write')) return null
     if (isNaN(amount) || amount <= 0) {
       toast({
         title: "Invalid amount",
@@ -28,13 +74,20 @@ export function useCoins() {
       return null
     }
 
-    const data = await addCoins(amount, description, 'MANUAL_ADJUSTMENT', undefined, note)
+    const data = await addCoins({
+      amount,
+      description,
+      type: 'MANUAL_ADJUSTMENT',
+      note,
+      userId: user?.id
+    })
     setCoins(data)
     toast({ title: "Success", description: `Added ${amount} coins` })
     return data
   }
 
   const remove = async (amount: number, description: string, note?: string) => {
+    if (!handlePermissionCheck(currentUser, 'coins', 'write')) return null
     const numAmount = Math.abs(amount)
     if (isNaN(numAmount) || numAmount <= 0) {
       toast({
@@ -44,13 +97,20 @@ export function useCoins() {
       return null
     }
 
-    const data = await removeCoins(numAmount, description, 'MANUAL_ADJUSTMENT', undefined, note)
+    const data = await removeCoins({
+      amount: numAmount,
+      description,
+      type: 'MANUAL_ADJUSTMENT',
+      note,
+      userId: user?.id
+    })
     setCoins(data)
     toast({ title: "Success", description: `Removed ${numAmount} coins` })
     return data
   }
 
   const updateNote = async (transactionId: string, note: string) => {
+    if (!handlePermissionCheck(currentUser, 'coins', 'write')) return null
     const transaction = coins.transactions.find(t => t.id === transactionId)
     if (!transaction) {
       toast({
@@ -83,8 +143,8 @@ export function useCoins() {
     add,
     remove,
     updateNote,
-    balance: coins.balance,
-    transactions: coins.transactions,
+    balance,
+    transactions: transactions,
     coinsEarnedToday,
     totalEarned,
     totalSpent,

hooks/useHabits.tsx

@@ -1,18 +1,63 @@
-import { useAtom } from 'jotai'
-import { habitsAtom, coinsAtom, settingsAtom } from '@/lib/atoms'
+import { useAtom, atom } from 'jotai'
+import { habitsAtom, coinsAtom, settingsAtom, usersAtom, habitFreqMapAtom } from '@/lib/atoms'
 import { addCoins, removeCoins, saveHabitsData } from '@/app/actions/data'
-import { Habit } from '@/lib/types'
-import { getNowInMilliseconds, getTodayInTimezone, isSameDate, t2d, d2t, getNow, getCompletionsForDate } from '@/lib/utils'
+import { Habit, Permission, SafeUser, User } from '@/lib/types'
 import { toast } from '@/hooks/use-toast'
+import { DateTime } from 'luxon'
+import {
+  getNowInMilliseconds,
+  getTodayInTimezone,
+  isSameDate,
+  t2d,
+  d2t,
+  getNow,
+  getCompletionsForDate,
+  getISODate,
+  d2s,
+  playSound,
+  checkPermission
+} from '@/lib/utils'
 import { ToastAction } from '@/components/ui/toast'
 import { Undo2 } from 'lucide-react'
+import { useHelpers } from '@/lib/client-helpers'
+
+function handlePermissionCheck(
+  user: SafeUser | undefined,
+  resource: 'habit' | 'wishlist' | 'coins',
+  action: 'write' | 'interact'
+): boolean {
+  if (!user) {
+    toast({
+      title: "Authentication Required",
+      description: "Please sign in to continue.",
+      variant: "destructive",
+    })
+    return false
+  }
+
+  if (!user.isAdmin && !checkPermission(user.permissions, resource, action)) {
+    toast({
+      title: "Permission Denied",
+      description: `You don't have ${action} permission for ${resource}s.`,
+      variant: "destructive",
+    })
+    return false
+  }
+
+  return true
+}
+
 
 export function useHabits() {
+  const [usersData] = useAtom(usersAtom)
+  const { currentUser } = useHelpers()
   const [habitsData, setHabitsData] = useAtom(habitsAtom)
   const [coins, setCoins] = useAtom(coinsAtom)
   const [settings] = useAtom(settingsAtom)
+  const [habitFreqMap] = useAtom(habitFreqMapAtom)
 
   const completeHabit = async (habit: Habit) => {
+    if (!handlePermissionCheck(currentUser, 'habit', 'interact')) return
     const timezone = settings.system.timezone
     const today = getTodayInTimezone(timezone)
 
@@ -31,13 +76,15 @@ export function useHabits() {
         description: `You've already completed this habit today.`,
         variant: "destructive",
       })
-      return null
+      return
     }
 
     // Add new completion
     const updatedHabit = {
       ...habit,
-      completions: [...habit.completions, d2t({ dateTime: getNow({ timezone }) })]
+      completions: [...habit.completions, d2t({ dateTime: getNow({ timezone }) })],
+      // Archive the habit if it's a task and we're about to reach the target
+      archived: habit.isTask && completionsToday + 1 === target ? true : habit.archived
     }
 
     const updatedHabits = habitsData.habits.map(h =>
@@ -45,29 +92,36 @@ export function useHabits() {
     )
 
     await saveHabitsData({ habits: updatedHabits })
-    setHabitsData({ habits: updatedHabits })
 
     // Check if we've now reached the target
     const isTargetReached = completionsToday + 1 === target
     if (isTargetReached) {
-      const updatedCoins = await addCoins(
-        habit.coinReward,
-        `Completed habit: ${habit.name}`,
-        'HABIT_COMPLETION',
-        habit.id
-      )
+      const updatedCoins = await addCoins({
+        amount: habit.coinReward,
+        description: `Completed: ${habit.name}`,
+        type: habit.isTask ? 'TASK_COMPLETION' : 'HABIT_COMPLETION',
+        relatedItemId: habit.id,
+      })
+      isTargetReached && playSound()
+      toast({
+        title: "Completed!",
+        description: `You earned ${habit.coinReward} coins.`,
+        action: <ToastAction altText="Undo" className="gap-2" onClick={() => undoComplete(updatedHabit)}>
+          <Undo2 className="h-4 w-4" />Undo
+        </ToastAction>
+      })
       setCoins(updatedCoins)
+    } else {
+      toast({
+        title: "Progress!",
+        description: `You've completed ${completionsToday + 1}/${target} times today.`,
+        action: <ToastAction altText="Undo" className="gap-2" onClick={() => undoComplete(updatedHabit)}>
+          <Undo2 className="h-4 w-4" />Undo
+        </ToastAction>
+      })
     }
-
-    toast({
-      title: isTargetReached ? "Habit completed!" : "Progress!",
-      description: isTargetReached
-        ? `You earned ${habit.coinReward} coins.`
-        : `You've completed ${completionsToday + 1}/${target} times today.`,
-      action: <ToastAction altText="Undo" className="gap-2" onClick={() => undoComplete(updatedHabit)}>
-        <Undo2 className="h-4 w-4" />Undo
-      </ToastAction>
-    })
+    // move atom update at the end of function to improve UI responsiveness
+    setHabitsData({ habits: updatedHabits })
 
     return {
       updatedHabits,
@@ -77,6 +131,7 @@ export function useHabits() {
   }
 
   const undoComplete = async (habit: Habit) => {
+    if (!handlePermissionCheck(currentUser, 'habit', 'interact')) return
     const timezone = settings.system.timezone
     const today = t2d({ timestamp: getTodayInTimezone(timezone), timezone })
 
@@ -86,12 +141,13 @@ export function useHabits() {
     )
 
     if (todayCompletions.length > 0) {
-      // Remove the most recent completion
+      // Remove the most recent completion and unarchive if needed
       const updatedHabit = {
         ...habit,
         completions: habit.completions.filter(
           (_, index) => index !== habit.completions.length - 1
-        )
+        ),
+        archived: habit.isTask ? false : habit.archived // Unarchive if it's a task
       }
 
       const updatedHabits = habitsData.habits.map(h =>
@@ -104,12 +160,12 @@ export function useHabits() {
       // If we were at the target, remove the coins
       const target = habit.targetCompletions || 1
       if (todayCompletions.length === target) {
-        const updatedCoins = await removeCoins(
-          habit.coinReward,
-          `Undid habit completion: ${habit.name}`,
-          'HABIT_UNDO',
-          habit.id
-        )
+        const updatedCoins = await removeCoins({
+          amount: habit.coinReward,
+          description: `Undid completion: ${habit.name}`,
+          type: habit.isTask ? 'TASK_UNDO' : 'HABIT_UNDO',
+          relatedItemId: habit.id,
+        })
         setCoins(updatedCoins)
       }
 
@@ -136,11 +192,12 @@ export function useHabits() {
         description: "This habit hasn't been completed today.",
         variant: "destructive",
       })
-      return null
+      return
     }
   }
 
   const saveHabit = async (habit: Omit<Habit, 'id'> & { id?: string }) => {
+    if (!handlePermissionCheck(currentUser, 'habit', 'write')) return
     const newHabit = {
       ...habit,
       id: habit.id || getNowInMilliseconds().toString()
@@ -155,16 +212,109 @@ export function useHabits() {
   }
 
   const deleteHabit = async (id: string) => {
+    if (!handlePermissionCheck(currentUser, 'habit', 'write')) return
     const updatedHabits = habitsData.habits.filter(h => h.id !== id)
     await saveHabitsData({ habits: updatedHabits })
     setHabitsData({ habits: updatedHabits })
     return updatedHabits
   }
 
+  const completePastHabit = async (habit: Habit, date: DateTime) => {
+    if (!handlePermissionCheck(currentUser, 'habit', 'interact')) return
+    const timezone = settings.system.timezone
+    const dateKey = getISODate({ dateTime: date, timezone })
+
+    // Check if already completed on this date
+    const completionsOnDate = habit.completions.filter(completion =>
+      isSameDate(t2d({ timestamp: completion, timezone }), date)
+    ).length
+    const target = habit.targetCompletions || 1
+
+    if (completionsOnDate >= target) {
+      toast({
+        title: "Already completed",
+        description: `This habit was already completed on ${d2s({ dateTime: date, timezone, format: 'yyyy-MM-dd' })}.`,
+        variant: "destructive",
+      })
+      return
+    }
+
+    // Use current time but with the past date
+    const now = getNow({ timezone })
+    const completionDateTime = date.set({
+      hour: now.hour,
+      minute: now.minute,
+      second: now.second,
+      millisecond: now.millisecond
+    })
+    const completionTimestamp = d2t({ dateTime: completionDateTime })
+    const updatedHabit = {
+      ...habit,
+      completions: [...habit.completions, completionTimestamp]
+    }
+
+    const updatedHabits = habitsData.habits.map(h =>
+      h.id === habit.id ? updatedHabit : h
+    )
+
+    await saveHabitsData({ habits: updatedHabits })
+    setHabitsData({ habits: updatedHabits })
+
+    // Check if we've now reached the target
+    const isTargetReached = completionsOnDate + 1 === target
+    if (isTargetReached) {
+      const updatedCoins = await addCoins({
+        amount: habit.coinReward,
+        description: `Completed: ${habit.name} on ${d2s({ dateTime: date, timezone, format: 'yyyy-MM-dd' })}`,
+        type: habit.isTask ? 'TASK_COMPLETION' : 'HABIT_COMPLETION',
+        relatedItemId: habit.id,
+      })
+      setCoins(updatedCoins)
+    }
+
+    toast({
+      title: isTargetReached ? "Completed!" : "Progress!",
+      description: isTargetReached
+        ? `You earned ${habit.coinReward} coins for ${dateKey}.`
+        : `You've completed ${completionsOnDate + 1}/${target} times on ${dateKey}.`,
+      action: <ToastAction altText="Undo" className="gap-2" onClick={() => undoComplete(updatedHabit)}>
+        <Undo2 className="h-4 w-4" />Undo
+      </ToastAction>
+    })
+
+    return {
+      updatedHabits,
+      newBalance: coins.balance,
+      newTransactions: coins.transactions
+    }
+  }
+
+  const archiveHabit = async (id: string) => {
+    if (!handlePermissionCheck(currentUser, 'habit', 'write')) return
+    const updatedHabits = habitsData.habits.map(h =>
+      h.id === id ? { ...h, archived: true } : h
+    )
+    await saveHabitsData({ habits: updatedHabits })
+    setHabitsData({ habits: updatedHabits })
+  }
+
+  const unarchiveHabit = async (id: string) => {
+    if (!handlePermissionCheck(currentUser, 'habit', 'write')) return
+    const updatedHabits = habitsData.habits.map(h =>
+      h.id === id ? { ...h, archived: false } : h
+    )
+    await saveHabitsData({ habits: updatedHabits })
+    setHabitsData({ habits: updatedHabits })
+  }
+
   return {
     completeHabit,
     undoComplete,
     saveHabit,
-    deleteHabit
+    deleteHabit,
+    completePastHabit,
+    archiveHabit,
+    unarchiveHabit,
+    habitFreqMap,
   }
 }

hooks/useWishlist.tsx

@@ -4,43 +4,115 @@ import { saveWishlistItems, removeCoins } from '@/app/actions/data'
 import { toast } from '@/hooks/use-toast'
 import { WishlistItemType } from '@/lib/types'
 import { celebrations } from '@/utils/celebrations'
+import { checkPermission } from '@/lib/utils'
+import { useHelpers } from '@/lib/client-helpers'
+import { useCoins } from './useCoins'
+
+function handlePermissionCheck(
+  user: any,
+  resource: 'habit' | 'wishlist' | 'coins',
+  action: 'write' | 'interact'
+): boolean {
+  if (!user) {
+    toast({
+      title: "Authentication Required",
+      description: "Please sign in to continue.",
+      variant: "destructive",
+    })
+    return false
+  }
+  
+  if (!user.isAdmin && !checkPermission(user.permissions, resource, action)) {
+    toast({
+      title: "Permission Denied",
+      description: `You don't have ${action} permission for ${resource}s.`,
+      variant: "destructive",
+    })
+    return false
+  }
+  
+  return true
+}
 
 export function useWishlist() {
+  const { currentUser: user } = useHelpers()
   const [wishlist, setWishlist] = useAtom(wishlistAtom)
   const [coins, setCoins] = useAtom(coinsAtom)
-  const balance = coins.balance
+  const { balance } = useCoins()
 
   const addWishlistItem = async (item: Omit<WishlistItemType, 'id'>) => {
+    if (!handlePermissionCheck(user, 'wishlist', 'write')) return
     const newItem = { ...item, id: Date.now().toString() }
     const newItems = [...wishlist.items, newItem]
-    setWishlist({ items: newItems })
-    await saveWishlistItems(newItems)
+    const newWishListData = { items: newItems }
+    setWishlist(newWishListData)
+    await saveWishlistItems(newWishListData)
   }
 
   const editWishlistItem = async (updatedItem: WishlistItemType) => {
+    if (!handlePermissionCheck(user, 'wishlist', 'write')) return
     const newItems = wishlist.items.map(item =>
       item.id === updatedItem.id ? updatedItem : item
     )
-    setWishlist({ items: newItems })
-    await saveWishlistItems(newItems)
+    const newWishListData = { items: newItems }
+    setWishlist(newWishListData)
+    await saveWishlistItems(newWishListData)
   }
 
   const deleteWishlistItem = async (id: string) => {
+    if (!handlePermissionCheck(user, 'wishlist', 'write')) return
     const newItems = wishlist.items.filter(item => item.id !== id)
-    setWishlist({ items: newItems })
-    await saveWishlistItems(newItems)
+    const newWishListData = { items: newItems }
+    setWishlist(newWishListData)
+    await saveWishlistItems(newWishListData)
   }
 
   const redeemWishlistItem = async (item: WishlistItemType) => {
+    if (!handlePermissionCheck(user, 'wishlist', 'interact')) return false
     if (balance >= item.coinCost) {
-      const data = await removeCoins(
-        item.coinCost,
-        `Redeemed reward: ${item.name}`,
-        'WISH_REDEMPTION',
-        item.id
-      )
+      // Check if item has target completions and if we've reached the limit
+      if (item.targetCompletions && item.targetCompletions <= 0) {
+        toast({
+          title: "Redemption limit reached",
+          description: `You've reached the maximum redemptions for "${item.name}".`,
+          variant: "destructive",
+        })
+        return false
+      }
+
+      const data = await removeCoins({
+        amount: item.coinCost,
+        description: `Redeemed reward: ${item.name}`,
+        type: 'WISH_REDEMPTION',
+        relatedItemId: item.id
+      })
       setCoins(data)
 
+      // Update target completions if set
+      if (item.targetCompletions !== undefined) {
+        const newItems = wishlist.items.map(wishlistItem => {
+          if (wishlistItem.id === item.id) {
+            const newTarget = wishlistItem.targetCompletions! - 1
+            // If target reaches 0, archive the item
+            if (newTarget <= 0) {
+              return { 
+                ...wishlistItem, 
+                targetCompletions: undefined,
+                archived: true
+              }
+            }
+            return { 
+              ...wishlistItem, 
+              targetCompletions: newTarget 
+            }
+          }
+          return wishlistItem
+        })
+        const newWishListData = { items: newItems }
+        setWishlist(newWishListData)
+        await saveWishlistItems(newWishListData)
+      }
+
       // Randomly choose a celebration effect
       const celebrationEffects = [
         celebrations.emojiParty
@@ -66,11 +138,33 @@ export function useWishlist() {
 
   const canRedeem = (cost: number) => balance >= cost
 
+  const archiveWishlistItem = async (id: string) => {
+    if (!handlePermissionCheck(user, 'wishlist', 'write')) return
+    const newItems = wishlist.items.map(item =>
+      item.id === id ? { ...item, archived: true } : item
+    )
+    const newWishListData = { items: newItems }
+    setWishlist(newWishListData)
+    await saveWishlistItems(newWishListData)
+  }
+
+  const unarchiveWishlistItem = async (id: string) => {
+    if (!handlePermissionCheck(user, 'wishlist', 'write')) return
+    const newItems = wishlist.items.map(item =>
+      item.id === id ? { ...item, archived: false } : item
+    )
+    const newWishListData = { items: newItems }
+    setWishlist(newWishListData)
+    await saveWishlistItems(newWishListData)
+  }
+
   return {
     addWishlistItem,
     editWishlistItem,
     deleteWishlistItem,
     redeemWishlistItem,
+    archiveWishlistItem,
+    unarchiveWishlistItem,
     canRedeem,
     wishlistItems: wishlist.items
   }

instrumentation.ts

@@ -0,0 +1,28 @@
+import { init } from '@/lib/env.server'; // startup env var check
+
+// Ensure this function is exported
+export async function register() {
+  // We only want to run this code on the server side
+  if (process.env.NEXT_RUNTIME === 'nodejs') {
+    console.log('Node.js runtime detected, running server-side instrumentation...');
+    // Initialize environment variables first
+    console.log('Initializing environment variables...');
+    init();
+    console.log('Environment variables initialized.');
+
+    // Dynamically import the scheduler initializer
+    // Use await import() for ESM compatibility
+    try {
+      console.log('Attempting to import scheduler...');
+      // Ensure the path is correct relative to the project root
+      const { initializeScheduler } = await import('./lib/scheduler');
+      console.log('Scheduler imported successfully. Initializing...');
+      initializeScheduler();
+      console.log('Scheduler initialization called.');
+    } catch (error) {
+      console.error('Failed to import or initialize scheduler:', error);
+    }
+  } else {
+    console.log(`Instrumentation hook running in environment: ${process.env.NEXT_RUNTIME}. Skipping server-side initialization.`);
+  }
+}

lib/atoms.ts

@@ -4,7 +4,12 @@ import {
   getDefaultHabitsData,
   getDefaultCoinsData,
   getDefaultWishlistData,
-  Habit
+  Habit,
+  ViewType,
+  getDefaultUsersData,
+  CompletionCache,
+  getDefaultServerSettings,
+  User,
 } from "./types";
 import {
   getTodayInTimezone,
@@ -15,13 +20,37 @@ import {
   calculateTotalSpent,
   calculateCoinsSpentToday,
   calculateTransactionsToday,
-  getCompletionsForToday
+  getCompletionsForToday,
+  getISODate,
+  isHabitDueToday,
+  getNow,
+  isHabitDue,
+  getHabitFreq
 } from "@/lib/utils";
+import { atomFamily, atomWithStorage } from "jotai/utils";
+import { DateTime } from "luxon";
+import { Freq } from "./types";
 
+export interface BrowserSettings {
+  viewType: ViewType
+  expandedHabits: boolean
+  expandedTasks: boolean
+  expandedWishlist: boolean
+}
+
+export const browserSettingsAtom = atomWithStorage('browserSettings', {
+  viewType: 'habits',
+  expandedHabits: false,
+  expandedTasks: false,
+  expandedWishlist: false
+} as BrowserSettings)
+
+export const usersAtom = atom(getDefaultUsersData())
 export const settingsAtom = atom(getDefaultSettings());
 export const habitsAtom = atom(getDefaultHabitsData());
 export const coinsAtom = atom(getDefaultCoinsData());
 export const wishlistAtom = atom(getDefaultWishlistData());
+export const serverSettingsAtom = atom(getDefaultServerSettings());
 
 // Derived atom for coins earned today
 export const coinsEarnedTodayAtom = atom((get) => {
@@ -56,6 +85,12 @@ export const transactionsTodayAtom = atom((get) => {
   return calculateTransactionsToday(coins.transactions, settings.system.timezone);
 });
 
+// Derived atom for current balance from all transactions
+export const coinsBalanceAtom = atom((get) => {
+  const coins = get(coinsAtom);
+  return coins.transactions.reduce((sum, transaction) => sum + transaction.amount, 0);
+});
+
 /* transient atoms */
 interface PomodoroAtom {
   show: boolean
@@ -71,7 +106,62 @@ export const pomodoroAtom = atom<PomodoroAtom>({
   minimized: false,
 })
 
-// Derived atom for today's completions of selected habit
+export const userSelectAtom = atom<boolean>(false)
+
+// Derived atom for completion cache
+export const completionCacheAtom = atom((get) => {
+  const habits = get(habitsAtom).habits;
+  const timezone = get(settingsAtom).system.timezone;
+  const cache: CompletionCache = {};
+
+  habits.forEach(habit => {
+    habit.completions.forEach(utcTimestamp => {
+      const localDate = t2d({ timestamp: utcTimestamp, timezone })
+        .toFormat('yyyy-MM-dd');
+
+      if (!cache[localDate]) {
+        cache[localDate] = {};
+      }
+
+      cache[localDate][habit.id] = (cache[localDate][habit.id] || 0) + 1;
+    });
+  });
+
+  return cache;
+});
+
+// Derived atom for completed habits by date, using the cache
+export const completedHabitsMapAtom = atom((get) => {
+  const habits = get(habitsAtom).habits;
+  const completionCache = get(completionCacheAtom);
+  const map = new Map<string, Habit[]>();
+
+  // For each date in the cache
+  Object.entries(completionCache).forEach(([dateKey, habitCompletions]) => {
+    const completedHabits = habits.filter(habit => {
+      const completionsNeeded = habit.targetCompletions || 1;
+      const completionsAchieved = habitCompletions[habit.id] || 0;
+      return completionsAchieved >= completionsNeeded;
+    });
+
+    if (completedHabits.length > 0) {
+      map.set(dateKey, completedHabits);
+    }
+  });
+
+  return map;
+});
+
+// Derived atom for habit frequency map
+export const habitFreqMapAtom = atom((get) => {
+  const habits = get(habitsAtom).habits;
+  const map = new Map<string, Freq>();
+  habits.forEach(habit => {
+    map.set(habit.id, getHabitFreq(habit));
+  });
+  return map;
+});
+
 export const pomodoroTodayCompletionsAtom = atom((get) => {
   const pomo = get(pomodoroAtom)
   const habits = get(habitsAtom)
@@ -79,7 +169,7 @@ export const pomodoroTodayCompletionsAtom = atom((get) => {
 
   if (!pomo.selectedHabitId) return 0
 
-  const selectedHabit = habits.habits.find(h => h.id === pomo.selectedHabitId)
+  const selectedHabit = habits.habits.find(h => h.id === pomo.selectedHabitId!)
   if (!selectedHabit) return 0
 
   return getCompletionsForToday({
@@ -87,3 +177,28 @@ export const pomodoroTodayCompletionsAtom = atom((get) => {
     timezone: settings.system.timezone
   })
 })
+
+// Derived atom to check if any habits are tasks
+export const hasTasksAtom = atom((get) => {
+  const habits = get(habitsAtom)
+  return habits.habits.some(habit => habit.isTask === true)
+})
+
+// Atom family for habits by specific date
+export const habitsByDateFamily = atomFamily((dateString: string) =>
+  atom((get) => {
+    const habits = get(habitsAtom).habits;
+    const settings = get(settingsAtom);
+    const timezone = settings.system.timezone;
+
+    const date = DateTime.fromISO(dateString).setZone(timezone);
+    return habits.filter(habit => isHabitDue({ habit, timezone, date }));
+  })
+);
+
+// Derived atom for daily habits
+export const dailyHabitsAtom = atom((get) => {
+  const settings = get(settingsAtom);
+  const today = getTodayInTimezone(settings.system.timezone);
+  return get(habitsByDateFamily(today));
+});

lib/backup.ts

@@ -0,0 +1,143 @@
+import fs from 'fs/promises';
+import { createWriteStream } from 'fs'; // Use specific import for createWriteStream
+import path from 'path';
+import archiver from 'archiver';
+import { loadSettings } from '@/app/actions/data'; // Adjust path if needed
+import { DateTime } from 'luxon';
+
+const BACKUP_DIR = path.join(process.cwd(), 'backups');
+const DATA_DIR = path.join(process.cwd(), 'data');
+const MAX_BACKUPS = 7; // Number of backups to keep
+
+async function ensureBackupDir() {
+  try {
+    await fs.access(BACKUP_DIR);
+  } catch {
+    await fs.mkdir(BACKUP_DIR, { recursive: true });
+    console.log('Created backup directory:', BACKUP_DIR);
+  }
+}
+
+async function rotateBackups() {
+  try {
+    await ensureBackupDir();
+    const files = await fs.readdir(BACKUP_DIR);
+    const backupFiles = files
+      .filter(file => file.startsWith('backup-') && file.endsWith('.zip'))
+      .map(file => ({
+        name: file,
+        path: path.join(BACKUP_DIR, file),
+      }));
+
+    if (backupFiles.length <= MAX_BACKUPS) {
+      console.log(`Rotation check: ${backupFiles.length} backups found, less than or equal to max ${MAX_BACKUPS}. No rotation needed.`);
+      return; // No rotation needed
+    }
+
+    console.log(`Rotation check: ${backupFiles.length} backups found, exceeding max ${MAX_BACKUPS}. Starting rotation.`);
+
+    // Get stats to sort by creation time (mtime as proxy)
+    const fileStats = await Promise.all(
+      backupFiles.map(async (file) => ({
+        ...file,
+        stat: await fs.stat(file.path),
+      }))
+    );
+
+    // Sort oldest first
+    fileStats.sort((a, b) => a.stat.mtime.getTime() - b.stat.mtime.getTime());
+
+    const filesToDelete = fileStats.slice(0, fileStats.length - MAX_BACKUPS);
+    console.log(`Identified ${filesToDelete.length} backups to delete.`);
+
+    for (const file of filesToDelete) {
+      try {
+        await fs.unlink(file.path);
+        console.log(`Rotated (deleted) old backup: ${file.name}`);
+      } catch (err) {
+        console.error(`Error deleting old backup ${file.name}:`, err);
+      }
+    }
+  } catch (error) {
+    console.error('Error during backup rotation:', error);
+  }
+}
+
+export async function runBackup() {
+  try {
+    const settings = await loadSettings();
+    if (!settings.system.autoBackupEnabled) {
+      console.log('Auto backup is disabled in settings. Skipping backup.');
+      return;
+    }
+
+    console.log('Starting daily backup...');
+    await ensureBackupDir();
+
+    const timestamp = DateTime.now().toFormat('yyyy-MM-dd_HH-mm-ss');
+    const backupFileName = `backup-${timestamp}.zip`;
+    const backupFilePath = path.join(BACKUP_DIR, backupFileName);
+
+    // Use createWriteStream from fs directly
+    const output = createWriteStream(backupFilePath);
+    const archive = archiver('zip', {
+      zlib: { level: 9 } // Sets the compression level.
+    });
+
+    return new Promise<void>((resolve, reject) => {
+      output.on('close', async () => {
+        console.log(`Backup created successfully: ${backupFileName} (${archive.pointer()} total bytes)`);
+        try {
+          await rotateBackups(); // Rotate after successful backup
+          resolve();
+        } catch (rotationError) {
+          console.error("Error during post-backup rotation:", rotationError);
+          // Decide if backup failure should depend on rotation failure
+          // For now, resolve even if rotation fails, as backup itself succeeded.
+          resolve();
+        }
+      });
+
+      // Handle stream finish event for better completion tracking
+      output.on('finish', () => {
+        console.log('Backup file stream finished writing.');
+      });
+
+      archive.on('warning', (err) => {
+        if (err.code === 'ENOENT') {
+          // Log specific warnings but don't necessarily reject
+          console.warn('Archiver warning (ENOENT):', err);
+        } else {
+          // Treat other warnings as potential issues, but maybe not fatal
+          console.warn('Archiver warning:', err);
+        }
+      });
+
+      archive.on('error', (err) => {
+        console.error('Archiver error:', err);
+        reject(err); // Reject the promise on critical archiver errors
+      });
+
+      // Pipe archive data to the file
+      archive.pipe(output);
+
+      // Append the entire data directory to the archive
+      // The second argument specifies the path prefix inside the zip file (false means root)
+      console.log(`Archiving directory: ${DATA_DIR}`);
+      archive.directory(DATA_DIR, false);
+
+      // Finalize the archive (writes the central directory)
+      console.log('Finalizing archive...');
+      archive.finalize().catch(err => {
+        // Catch potential errors during finalization
+        console.error('Error during archive finalization:', err);
+        reject(err);
+      });
+    });
+
+  } catch (error) {
+    console.error('Failed to run backup:', error);
+    // Rethrow or handle as appropriate for the scheduler
+    throw error;
+  }
+}

lib/client-helpers.ts

@@ -0,0 +1,38 @@
+// client helpers
+'use-client'
+
+import { useSession } from "next-auth/react"
+import { User, UserId } from './types'
+import { useAtom } from 'jotai'
+import { usersAtom } from './atoms'
+import { checkPermission } from './utils'
+
+export function useHelpers() {
+  const { data: session, status } = useSession()
+  const currentUserId = session?.user.id
+  const [usersData] = useAtom(usersAtom)
+  const currentUser = usersData.users.find((u) => u.id === currentUserId)
+  // detect iOS: https://stackoverflow.com/a/9039885
+  function iOS() {
+    return [
+      'iPad Simulator',
+      'iPhone Simulator',
+      'iPod Simulator',
+      'iPad',
+      'iPhone',
+      'iPod',
+    ].includes(navigator.platform)
+    // iPad on iOS 13 detection
+    || (navigator.userAgent.includes("Mac") && "ontouchend" in document)
+  }  
+
+  return {
+    currentUserId,
+    currentUser,
+    usersData,
+    status,
+    hasPermission: (resource: 'habit' | 'wishlist' | 'coins', action: 'write' | 'interact') => currentUser?.isAdmin ||
+      checkPermission(currentUser?.permissions, resource, action),
+    isIOS: iOS(),
+  }
+}

lib/constants.ts

@@ -1,4 +1,7 @@
-export const INITIAL_RECURRENCE_RULE = 'daily'
+import { CheckSquare, Target } from "lucide-react"
+
+export const INITIAL_RECURRENCE_RULE = 'every day'
+export const INITIAL_DUE = 'today'
 
 export const RECURRENCE_RULE_MAP: { [key: string]: string } = {
   'daily': 'FREQ=DAILY',
@@ -8,3 +11,22 @@ export const RECURRENCE_RULE_MAP: { [key: string]: string } = {
   '': 'invalid',
 }
 
+export const DUE_MAP: { [key: string]: string } = {
+  'tom': 'tomorrow',
+  'tod': 'today',
+  'yes': 'yesterday',
+}
+
+export const HabitIcon = Target
+export const TaskIcon = CheckSquare;
+export const QUICK_DATES = [
+  { label: 'Today', value: 'today' },
+  { label: 'Tomorrow', value: 'tomorrow' },
+  { label: 'Monday', value: 'this monday' },
+  { label: 'Tuesday', value: 'this tuesday' },
+  { label: 'Wednesday', value: 'this wednesday' },
+  { label: 'Thursday', value: 'this thursday' },
+  { label: 'Friday', value: 'this friday' },
+  { label: 'Saturday', value: 'this saturday' },
+  { label: 'Sunday', value: 'this sunday' },
+] as const

lib/env.server.ts

@@ -0,0 +1,32 @@
+import { z } from "zod"
+
+const zodEnv = z.object({
+  AUTH_SECRET: z.string(),
+  DEMO: z.string().optional(),
+})
+
+declare global {
+  interface ProcessEnv extends z.TypeOf<typeof zodEnv> {
+    AUTH_SECRET: string;
+    DEMO?: string;
+  }
+}
+
+export function init() {
+  try {
+    zodEnv.parse(process.env)
+  } catch (err) {
+    if (err instanceof z.ZodError) {
+      const { fieldErrors } = err.flatten()
+      const errorMessage = Object.entries(fieldErrors)
+        .map(([field, errors]) =>
+          errors ? `${field}: ${errors.join(", ")}` : field,
+        )
+        .join("\n ")
+
+      throw new Error(
+        `Missing environment variables:\n ${errorMessage}`,
+      )
+    }
+  }
+}

lib/exceptions.ts

@@ -0,0 +1,6 @@
+export class PermissionError extends Error {
+  constructor(message: string) {
+    super(message)
+    this.name = 'PermissionError'
+  }
+}

lib/scheduler.ts

@@ -0,0 +1,54 @@
+import cron from 'node-cron';
+import { runBackup } from './backup';
+
+let isSchedulerInitialized = false;
+
+export function initializeScheduler() {
+  if (isSchedulerInitialized) {
+    console.log('Scheduler already initialized.');
+    return;
+  }
+
+  console.log('Initializing scheduler...');
+
+  // Schedule backup to run daily at 2:00 AM server time
+  // Format: second minute hour day-of-month month day-of-week
+  // '0 2 * * *' means at minute 0 of hour 2 (2:00 AM) every day
+  const backupJob = cron.schedule('0 2 * * *', async () => {
+    console.log(`[${new Date().toISOString()}] Running scheduled daily backup task...`);
+    try {
+      await runBackup();
+      console.log(`[${new Date().toISOString()}] Scheduled backup task completed successfully.`);
+    } catch (err) {
+      console.error(`[${new Date().toISOString()}] Scheduled backup task failed:`, err);
+    }
+  }, {
+    scheduled: true,
+    // Consider adding timezone support later if needed, based on user settings
+    // timezone: "Your/Timezone"
+  });
+
+  console.log('Scheduler initialized. Daily backup scheduled for 2:00 AM server time.');
+  isSchedulerInitialized = true;
+
+  // Graceful shutdown handling (optional but recommended)
+  process.on('SIGTERM', () => {
+    console.log('SIGTERM signal received. Stopping scheduler...');
+    backupJob.stop();
+    // Add cleanup for other jobs if needed
+    process.exit(0);
+  });
+
+  process.on('SIGINT', () => {
+    console.log('SIGINT signal received. Stopping scheduler...');
+    backupJob.stop();
+    // Add cleanup for other jobs if needed
+    process.exit(0);
+  });
+
+  // --- Add other scheduled tasks here in the future ---
+  // Example:
+  // cron.schedule('* * * * *', () => {
+  //   console.log('Running every minute');
+  // });
+}

lib/server-helpers.ts

@@ -0,0 +1,40 @@
+import { auth } from '@/auth'
+import 'server-only'
+import { User, UserId } from './types'
+import { loadUsersData } from '@/app/actions/data'
+import { randomBytes, scryptSync } from 'crypto'
+
+export async function getCurrentUserId(): Promise<UserId | undefined> {
+  const session = await auth()
+  const user = session?.user
+  return user?.id
+}
+
+export async function getCurrentUser(): Promise<User | undefined> {
+  const currentUserId = await getCurrentUserId()
+  if (!currentUserId) {
+    return undefined
+  }
+  const usersData = await loadUsersData()
+  return usersData.users.find((u) => u.id === currentUserId)
+}
+export function saltAndHashPassword(password: string, salt?: string): string {
+  if (password.length === 0) throw new Error('Password must not be empty')
+  salt = salt || randomBytes(16).toString('hex')
+  const hash = scryptSync(password, salt, 64).toString('hex')
+  return `${salt}:${hash}`
+}
+
+export function verifyPassword(password?: string, storedHash?: string): boolean {
+  // if both password and storedHash is undefined, return true
+  if (!password && !storedHash) return true
+  // else if either password or storedHash is undefined, return false
+  if (!password || !storedHash) return false
+
+  // Split the stored hash into its salt and hash components
+  const [salt, hash] = storedHash.split(':')
+  // Hash the input password with the same salt
+  const newHash = saltAndHashPassword(password, salt).split(':')[1]
+  // Compare the new hash with the stored hash
+  return newHash === hash
+}

lib/types.ts

@@ -1,3 +1,40 @@
+import { RRule } from "rrule"
+import { uuid } from "./utils"
+import { DateTime } from "luxon"
+
+export type UserId = string
+
+export type Permission = {
+  habit: {
+    write: boolean
+    interact: boolean
+  }
+  wishlist: {
+    write: boolean
+    interact: boolean
+  }
+  coins: {
+    write: boolean
+    interact: boolean
+  }
+}
+
+export type SessionUser = {
+  id: UserId
+}
+
+export type SafeUser = SessionUser & {
+  username: string
+  avatarPath?: string
+  permissions?: Permission[]
+  isAdmin?: boolean
+}
+
+export type User = SafeUser & {
+  password?: string // Optional: Allow users without passwords (e.g., initial setup)
+  lastNotificationReadTimestamp?: string // UTC ISO date string
+}
+
 export type Habit = {
   id: string
   name: string
@@ -6,8 +43,13 @@ export type Habit = {
   coinReward: number
   targetCompletions?: number // Optional field, default to 1
   completions: string[] // Array of UTC ISO date strings
+  isTask?: boolean // mark the habit as a task
+  archived?: boolean // mark the habit as archived
+  pinned?: boolean // mark the habit as pinned
+  userIds?: UserId[]
 }
 
+
 export type Freq = 'daily' | 'weekly' | 'monthly' | 'yearly'
 
 export type WishlistItemType = {
@@ -15,9 +57,13 @@ export type WishlistItemType = {
   name: string
   description: string
   coinCost: number
+  archived?: boolean // mark the wishlist item as archived
+  targetCompletions?: number // Optional field, infinity when unset
+  link?: string // Optional URL to external resource
+  userIds?: UserId[]
 }
 
-export type TransactionType = 'HABIT_COMPLETION' | 'HABIT_UNDO' | 'WISH_REDEMPTION' | 'MANUAL_ADJUSTMENT';
+export type TransactionType = 'HABIT_COMPLETION' | 'HABIT_UNDO' | 'WISH_REDEMPTION' | 'MANUAL_ADJUSTMENT' | 'TASK_COMPLETION' | 'TASK_UNDO';
 
 export interface CoinTransaction {
   id: string;
@@ -27,12 +73,18 @@ export interface CoinTransaction {
   timestamp: string;
   relatedItemId?: string;
   note?: string;
+  userId?: UserId;
+}
+
+export interface UserData {
+  users: User[]
 }
 
 export interface HabitsData {
   habits: Habit[];
 }
 
+
 export interface CoinsData {
   balance: number;
   transactions: CoinTransaction[];
@@ -45,10 +97,23 @@ export interface WishlistData {
 }
 
 // Default value functions
+export const getDefaultUsersData = (): UserData => ({
+  users: [
+    {
+      id: uuid(),
+      username: 'admin',
+      // password: '', // No default password for admin initially? Or set a secure default?
+      isAdmin: true,
+      lastNotificationReadTimestamp: undefined, // Initialize as undefined
+    }
+  ]
+});
+
 export const getDefaultHabitsData = (): HabitsData => ({
   habits: []
 });
 
+
 export const getDefaultCoinsData = (): CoinsData => ({
   balance: 0,
   transactions: []
@@ -64,17 +129,24 @@ export const getDefaultSettings = (): Settings => ({
     useGrouping: true,
   },
   system: {
-    timezone: Intl.DateTimeFormat().resolvedOptions().timeZone
+    timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
+    weekStartDay: 1, // Monday
+    autoBackupEnabled: true, // Add this line (default to true)
   },
   profile: {}
 });
 
+export const getDefaultServerSettings = (): ServerSettings => ({
+  isDemo: false
+})
+
 // Map of data types to their default values
 export const DATA_DEFAULTS = {
   wishlist: getDefaultWishlistData,
   habits: getDefaultHabitsData,
   coins: getDefaultCoinsData,
   settings: getDefaultSettings,
+  auth: getDefaultUsersData,
 } as const;
 
 // Type for all possible data types
@@ -85,12 +157,16 @@ export interface UISettings {
   useGrouping: boolean;
 }
 
+export type WeekDay = 0 | 1 | 2 | 3 | 4 | 5 | 6; // 0 = Sunday, 6 = Saturday
+
 export interface SystemSettings {
   timezone: string;
+  weekStartDay: WeekDay;
+  autoBackupEnabled: boolean; // Add this line
 }
 
 export interface ProfileSettings {
-  avatarPath?: string;
+  avatarPath?: string; // deprecated
 }
 
 export interface Settings {
@@ -99,9 +175,31 @@ export interface Settings {
   profile: ProfileSettings;
 }
 
+export type CompletionCache = {
+  [dateKey: string]: {  // dateKey format: "YYYY-MM-DD"
+    [habitId: string]: number  // number of completions on that date
+  }
+}
+
+export type ViewType = 'habits' | 'tasks'
+
 export interface JotaiHydrateInitialValues {
   settings: Settings;
   coins: CoinsData;
   habits: HabitsData;
   wishlist: WishlistData;
+  users: UserData;
+  serverSettings: ServerSettings;
+}
+
+export interface ServerSettings {
+  isDemo: boolean
+}
+
+export type ParsedResultType = DateTime<true> | RRule | string | null // null if invalid
+
+// return rrule / datetime (machine-readable frequency), string (human-readable frequency), or null (invalid)
+export interface ParsedFrequencyResult {
+  message: string | null
+  result: ParsedResultType
 }

lib/utils.test.ts

@@ -1,4 +1,4 @@
-import { expect, test, describe, beforeAll, beforeEach, afterAll, spyOn } from "bun:test";
+import { expect, test, describe, beforeEach, spyOn } from "bun:test";
 import {
   cn,
   getTodayInTimezone,
@@ -14,12 +14,21 @@ import {
   calculateTotalEarned,
   calculateTotalSpent,
   calculateCoinsSpentToday,
-  isHabitDueToday
+  isHabitDueToday,
+  isHabitDue,
+  uuid,
+  isTaskOverdue,
+  deserializeRRule,
+  serializeRRule,
+  convertHumanReadableFrequencyToMachineReadable,
+  convertMachineReadableFrequencyToHumanReadable,
+  getUnsupportedRRuleReason
 } from './utils'
-import { CoinTransaction } from './types'
+import { CoinTransaction, ParsedResultType } from './types'
 import { DateTime } from "luxon";
-import { RRule } from 'rrule';
+import { RRule, Weekday } from 'rrule';
 import { Habit } from '@/lib/types';
+import { INITIAL_DUE } from './constants';
 
 describe('cn utility', () => {
   test('should merge class names correctly', () => {
@@ -30,6 +39,140 @@ describe('cn utility', () => {
   })
 })
 
+describe('getUnsupportedRRuleReason', () => {
+  test('should return message for HOURLY frequency', () => {
+    const rrule = new RRule({ freq: RRule.HOURLY });
+    expect(getUnsupportedRRuleReason(rrule)).toBe('Hourly frequency is not supported.');
+  });
+
+  test('should return message for MINUTELY frequency', () => {
+    const rrule = new RRule({ freq: RRule.MINUTELY });
+    expect(getUnsupportedRRuleReason(rrule)).toBe('Minutely frequency is not supported.');
+  });
+
+  test('should return message for SECONDLY frequency', () => {
+    const rrule = new RRule({ freq: RRule.SECONDLY });
+    expect(getUnsupportedRRuleReason(rrule)).toBe('Secondly frequency is not supported.');
+  });
+
+  test('should return message for DAILY frequency with interval > 1', () => {
+    const rrule = new RRule({ freq: RRule.DAILY, interval: 2 });
+    expect(getUnsupportedRRuleReason(rrule)).toBe('Daily frequency with intervals greater than 1 is not supported.');
+  });
+
+  test('should return null for DAILY frequency without interval', () => {
+    const rrule = new RRule({ freq: RRule.DAILY });
+    expect(getUnsupportedRRuleReason(rrule)).toBeNull();
+  });
+
+  test('should return null for DAILY frequency with interval = 1', () => {
+    const rrule = new RRule({ freq: RRule.DAILY, interval: 1 });
+    expect(getUnsupportedRRuleReason(rrule)).toBeNull();
+  });
+
+  test('should return null for WEEKLY frequency', () => {
+    const rrule = new RRule({ freq: RRule.WEEKLY, byweekday: [RRule.MO] }); // Added byweekday for validity
+    expect(getUnsupportedRRuleReason(rrule)).toBeNull();
+  });
+
+  test('should return null for MONTHLY frequency', () => {
+    const rrule = new RRule({ freq: RRule.MONTHLY, bymonthday: [1] }); // Added bymonthday for validity
+    expect(getUnsupportedRRuleReason(rrule)).toBeNull();
+  });
+
+  test('should return null for YEARLY frequency', () => {
+    const rrule = new RRule({ freq: RRule.YEARLY, bymonth: [1], bymonthday: [1] }); // Added bymonth/bymonthday for validity
+    expect(getUnsupportedRRuleReason(rrule)).toBeNull();
+  });
+
+  test('should return null for WEEKLY frequency with interval', () => {
+    // Weekly with interval is supported
+    const rrule = new RRule({ freq: RRule.WEEKLY, interval: 2, byweekday: [RRule.TU] }); // Added byweekday for validity
+    expect(getUnsupportedRRuleReason(rrule)).toBeNull();
+  });
+});
+
+describe('isTaskOverdue', () => {
+  const createTestHabit = (frequency: string, isTask = true, archived = false): Habit => ({
+    id: 'test-habit',
+    name: 'Test Habit',
+    description: '',
+    frequency,
+    coinReward: 10,
+    completions: [],
+    isTask,
+    archived
+  })
+
+  test('should return false for non-tasks', () => {
+    const habit = createTestHabit('FREQ=DAILY', false)
+    expect(isTaskOverdue(habit, 'UTC')).toBe(false)
+  })
+
+  test('should return false for archived tasks', () => {
+    const habit = createTestHabit('2024-01-01T00:00:00Z', true, true)
+    expect(isTaskOverdue(habit, 'UTC')).toBe(false)
+  })
+
+  test('should return false for future tasks', () => {
+    const tomorrow = DateTime.now().plus({ days: 1 }).toUTC().toISO()
+    const habit = createTestHabit(tomorrow)
+    expect(isTaskOverdue(habit, 'UTC')).toBe(false)
+  })
+
+  test('should return false for completed past tasks', () => {
+    const yesterday = DateTime.now().minus({ days: 1 }).toUTC().toISO()
+    const habit = {
+      ...createTestHabit(yesterday),
+      completions: [DateTime.now().toUTC().toISO()]
+    }
+    expect(isTaskOverdue(habit, 'UTC')).toBe(false)
+  })
+
+  test('should return true for incomplete past tasks', () => {
+    const yesterday = DateTime.now().minus({ days: 1 }).toUTC().toISO()
+    const habit = createTestHabit(yesterday)
+    expect(isTaskOverdue(habit, 'UTC')).toBe(true)
+  })
+
+  test('should handle timezone differences correctly', () => {
+    // Create a task due "tomorrow" in UTC
+    const tomorrow = DateTime.now().plus({ days: 1 }).toUTC().toISO()
+    const habit = createTestHabit(tomorrow)
+    
+    // Test in various timezones
+    expect(isTaskOverdue(habit, 'UTC')).toBe(false)
+    expect(isTaskOverdue(habit, 'America/New_York')).toBe(false)
+    expect(isTaskOverdue(habit, 'Asia/Tokyo')).toBe(false)
+  })
+})
+
+describe('uuid', () => {
+  test('should generate valid UUIDs', () => {
+    const id = uuid()
+    // UUID v4 format: 8-4-4-4-12 hex digits
+    expect(id).toMatch(/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/)
+  })
+
+  test('should generate unique UUIDs', () => {
+    const ids = new Set()
+    for (let i = 0; i < 1000; i++) {
+      ids.add(uuid())
+    }
+    // All 1000 UUIDs should be unique
+    expect(ids.size).toBe(1000)
+  })
+
+  test('should generate v4 UUIDs', () => {
+    const id = uuid()
+    // Version 4 UUID has specific bits set:
+    // - 13th character is '4'
+    // - 17th character is '8', '9', 'a', or 'b'
+    expect(id.charAt(14)).toBe('4')
+    expect('89ab').toContain(id.charAt(19))
+  })
+})
+
 describe('datetime utilities', () => {
   let fixedNow: DateTime;
   let currentDateIndex = 0;
@@ -277,21 +420,21 @@ describe('isHabitDueToday', () => {
     DateTime.now = () => mockDate
 
     const habit = testHabit('FREQ=DAILY')
-    expect(isHabitDueToday(habit, 'UTC')).toBe(true)
+    expect(isHabitDueToday({ habit, timezone: 'UTC' })).toBe(true)
   })
 
   test('should return true for weekly habit on correct day', () => {
     const habit = testHabit('FREQ=WEEKLY;BYDAY=MO') // Monday
     const mockDate = DateTime.fromISO('2024-01-01T00:00:00Z') as DateTime<true> // Monday
     DateTime.now = () => mockDate
-    expect(isHabitDueToday(habit, 'UTC')).toBe(true)
+    expect(isHabitDueToday({ habit, timezone: 'UTC' })).toBe(true)
   })
 
   test('should return false for weekly habit on wrong day', () => {
     const habit = testHabit('FREQ=WEEKLY;BYDAY=MO') // Monday
     const mockDate = DateTime.fromISO('2024-01-02T00:00:00Z') as DateTime<true> // Tuesday
     DateTime.now = () => mockDate
-    expect(isHabitDueToday(habit, 'UTC')).toBe(false)
+    expect(isHabitDueToday({ habit, timezone: 'UTC' })).toBe(false)
   })
 
   test('should handle timezones correctly', () => {
@@ -339,7 +482,7 @@ describe('isHabitDueToday', () => {
     testCases.forEach(({ time, timezone, expected }) => {
       const mockDate = DateTime.fromISO(time) as DateTime<true>
       DateTime.now = () => mockDate
-      expect(isHabitDueToday(habit, timezone)).toBe(expected)
+      expect(isHabitDueToday({ habit, timezone })).toBe(expected)
     })
   })
 
@@ -368,7 +511,7 @@ describe('isHabitDueToday', () => {
     testCases.forEach(({ time, timezone, expected }) => {
       const mockDate = DateTime.fromISO(time) as DateTime<true>
       DateTime.now = () => mockDate
-      expect(isHabitDueToday(habit, timezone)).toBe(expected)
+      expect(isHabitDueToday({ habit, timezone })).toBe(expected)
     })
   })
 
@@ -396,7 +539,7 @@ describe('isHabitDueToday', () => {
     testCases.forEach(({ time, timezone, expected }) => {
       const mockDate = DateTime.fromISO(time) as DateTime<true>
       DateTime.now = () => mockDate
-      expect(isHabitDueToday(habit, timezone)).toBe(expected)
+      expect(isHabitDueToday({ habit, timezone })).toBe(expected)
     })
   })
 
@@ -424,7 +567,7 @@ describe('isHabitDueToday', () => {
     testCases.forEach(({ time, timezone, expected }) => {
       const mockDate = DateTime.fromISO(time) as DateTime<true>
       DateTime.now = () => mockDate
-      expect(isHabitDueToday(habit, timezone)).toBe(expected)
+      expect(isHabitDueToday({ habit, timezone })).toBe(expected)
     })
   })
 
@@ -432,31 +575,384 @@ describe('isHabitDueToday', () => {
     const habit = testHabit('FREQ=MONTHLY;BYMONTHDAY=1')
     const mockDate = DateTime.fromISO('2024-01-01T00:00:00Z') as DateTime<true> // 1st of month
     DateTime.now = () => mockDate
-    expect(isHabitDueToday(habit, 'UTC')).toBe(true)
+    expect(isHabitDueToday({ habit, timezone: 'UTC' })).toBe(true)
   })
 
   test('should handle yearly recurrence', () => {
     const habit = testHabit('FREQ=YEARLY;BYMONTH=1;BYMONTHDAY=1')
     const mockDate = DateTime.fromISO('2024-01-01T00:00:00Z') as DateTime<true> // Jan 1st
     DateTime.now = () => mockDate
-    expect(isHabitDueToday(habit, 'UTC')).toBe(true)
+    expect(isHabitDueToday({ habit, timezone: 'UTC' })).toBe(true)
   })
 
   test('should handle complex recurrence rules', () => {
     const habit = testHabit('FREQ=WEEKLY;BYDAY=MO,WE,FR')
     const mockDate = DateTime.fromISO('2024-01-01T00:00:00Z') as DateTime<true> // Monday
     DateTime.now = () => mockDate
-    expect(isHabitDueToday(habit, 'UTC')).toBe(true)
+    expect(isHabitDueToday({ habit, timezone: 'UTC' })).toBe(true)
   })
 
   test('should return false for invalid recurrence rule', () => {
     const habit = testHabit('INVALID_RRULE')
-    // Mock console.error to prevent test output pollution
-    const consoleSpy = spyOn(console, 'error').mockImplementation(() => { })
-
-    // Expect the function to throw an error
-    expect(() => isHabitDueToday(habit, 'UTC')).toThrow()
-
-    consoleSpy.mockRestore()
+    const consoleSpy = spyOn(console, 'error').mockImplementation(() => {})
+    expect(isHabitDueToday({ habit, timezone: 'UTC' })).toBe(false)
+  })
+})
+
+describe('isHabitDue', () => {
+  const testHabit = (frequency: string): Habit => ({
+    id: 'test-habit',
+    name: 'Test Habit',
+    description: '',
+    frequency,
+    coinReward: 10,
+    completions: []
+  })
+
+  test('should return true for daily habit on any date', () => {
+    const habit = testHabit('FREQ=DAILY')
+    const date = DateTime.fromISO('2024-01-01T12:34:56Z')
+    expect(isHabitDue({ habit, timezone: 'UTC', date })).toBe(true)
+  })
+
+  test('should return true for weekly habit on correct day', () => {
+    const habit = testHabit('FREQ=WEEKLY;BYDAY=MO') // Monday
+    const date = DateTime.fromISO('2024-01-01T00:00:00Z') // Monday
+    expect(isHabitDue({ habit, timezone: 'UTC', date })).toBe(true)
+  })
+
+  test('should return false for weekly habit on wrong day', () => {
+    const habit = testHabit('FREQ=WEEKLY;BYDAY=MO') // Monday
+    const date = DateTime.fromISO('2024-01-02T00:00:00Z') // Tuesday
+    expect(isHabitDue({ habit, timezone: 'UTC', date })).toBe(false)
+  })
+
+  test('should handle past dates correctly', () => {
+    const habit = testHabit('FREQ=WEEKLY;BYDAY=MO') // Monday
+    const pastDate = DateTime.fromISO('2023-12-25T00:00:00Z') // Christmas (Monday)
+    expect(isHabitDue({ habit, timezone: 'UTC', date: pastDate })).toBe(true)
+  })
+
+  test('should handle future dates correctly', () => {
+    const habit = testHabit('FREQ=WEEKLY;BYDAY=MO') // Monday
+    const futureDate = DateTime.fromISO('2024-12-30T00:00:00Z') // Monday
+    expect(isHabitDue({ habit, timezone: 'UTC', date: futureDate })).toBe(true)
+  })
+
+  test('should handle timezone transitions correctly', () => {
+    const habit = testHabit('FREQ=DAILY')
+    const testCases = [
+      {
+        date: '2024-01-01T04:00:00Z', // UTC time that's still previous day in New York
+        timezone: 'America/New_York',
+        expected: true
+      },
+      {
+        date: '2024-01-01T23:00:00Z', // Just before midnight in UTC
+        timezone: 'Asia/Tokyo', // Already next day in Tokyo
+        expected: true
+      },
+      {
+        date: '2024-01-01T01:00:00Z', // Just after midnight in UTC
+        timezone: 'Pacific/Honolulu', // Still previous day in Hawaii
+        expected: true
+      }
+    ]
+
+    testCases.forEach(({ date, timezone, expected }) => {
+      const dateObj = DateTime.fromISO(date)
+      expect(isHabitDue({ habit, timezone, date: dateObj })).toBe(expected)
+    })
+  })
+
+  test('should handle daylight saving time transitions', () => {
+    const habit = testHabit('FREQ=DAILY')
+    const testCases = [
+      {
+        date: '2024-03-10T02:30:00Z', // During DST transition in US
+        timezone: 'America/New_York',
+        expected: true
+      },
+      {
+        date: '2024-10-27T01:30:00Z', // During DST transition in Europe
+        timezone: 'Europe/London',
+        expected: true
+      }
+    ]
+
+    testCases.forEach(({ date, timezone, expected }) => {
+      const dateObj = DateTime.fromISO(date)
+      expect(isHabitDue({ habit, timezone, date: dateObj })).toBe(expected)
+    })
+  })
+
+  test('should handle monthly recurrence', () => {
+    const habit = testHabit('FREQ=MONTHLY;BYMONTHDAY=1')
+    const date = DateTime.fromISO('2024-01-01T00:00:00Z') // 1st of month
+    expect(isHabitDue({ habit, timezone: 'UTC', date })).toBe(true)
+  })
+
+  test('should handle yearly recurrence', () => {
+    const habit = testHabit('FREQ=YEARLY;BYMONTH=1;BYMONTHDAY=1')
+    const date = DateTime.fromISO('2024-01-01T00:00:00Z') // Jan 1st
+    expect(isHabitDue({ habit, timezone: 'UTC', date })).toBe(true)
+  })
+
+  test('should handle complex recurrence rules', () => {
+    const habit = testHabit('FREQ=WEEKLY;BYDAY=MO,WE,FR')
+    const date = DateTime.fromISO('2024-01-01T00:00:00Z') // Monday
+    expect(isHabitDue({ habit, timezone: 'UTC', date })).toBe(true)
+  })
+
+  test('should return false for invalid recurrence rule', () => {
+    const habit = testHabit('INVALID_RRULE')
+    const date = DateTime.fromISO('2024-01-01T00:00:00Z')
+    const consoleSpy = spyOn(console, 'error').mockImplementation(() => {})
+    expect(isHabitDue({ habit, timezone: 'UTC', date })).toBe(false)
+  })
+})
+
+describe('deserializeRRule', () => {
+  test('should deserialize valid RRule string', () => {
+    const rruleStr = 'FREQ=DAILY;INTERVAL=1'
+    const rrule = deserializeRRule(rruleStr)
+    expect(rrule).toBeInstanceOf(RRule)
+    expect(rrule?.origOptions.freq).toBe(RRule.DAILY)
+    expect(rrule?.origOptions.interval).toBe(1)
+  })
+
+  test('should return null for invalid RRule string', () => {
+    const rruleStr = 'INVALID_RRULE_STRING'
+    const rrule = deserializeRRule(rruleStr)
+    expect(rrule).toBeNull()
+  })
+
+  test('should handle complex RRule strings', () => {
+    const rruleStr = 'FREQ=WEEKLY;BYDAY=MO,WE,FR;INTERVAL=2;COUNT=10'
+    const rrule = deserializeRRule(rruleStr)
+    expect(rrule).toBeInstanceOf(RRule)
+    expect(rrule?.origOptions.freq).toBe(RRule.WEEKLY)
+    expect(rrule?.origOptions.byweekday).toEqual([RRule.MO, RRule.WE, RRule.FR])
+    expect(rrule?.origOptions.interval).toBe(2)
+    expect(rrule?.origOptions.count).toBe(10)
+  })
+})
+
+describe('serializeRRule', () => {
+  test('should serialize RRule object to string', () => {
+    const rrule = new RRule({
+      freq: RRule.DAILY,
+      interval: 1
+    })
+    const rruleStr = serializeRRule(rrule)
+    // RRule adds DTSTART automatically if not provided, so we check the core parts
+    expect(rruleStr).toContain('FREQ=DAILY')
+    expect(rruleStr).toContain('INTERVAL=1')
+  })
+
+  test('should return "invalid" for null input', () => {
+    const rruleStr = serializeRRule(null)
+    expect(rruleStr).toBe('invalid')
+  })
+
+  test('should serialize complex RRule objects', () => {
+    const rrule = new RRule({
+      freq: RRule.WEEKLY,
+      byweekday: [RRule.MO, RRule.WE, RRule.FR],
+      interval: 2,
+      count: 10
+    })
+    const rruleStr = serializeRRule(rrule)
+    expect(rruleStr).toContain('FREQ=WEEKLY')
+    expect(rruleStr).toContain('BYDAY=MO,WE,FR')
+    expect(rruleStr).toContain('INTERVAL=2')
+    expect(rruleStr).toContain('COUNT=10')
+  })
+})
+
+describe('convertHumanReadableFrequencyToMachineReadable', () => {
+  const timezone = 'America/New_York'
+
+  beforeEach(() => {
+    // Set a fixed date for consistent relative date parsing
+    const mockDate = DateTime.fromISO('2024-07-15T10:00:00', { zone: timezone }) as DateTime<true>
+    DateTime.now = () => mockDate
+  })
+
+  // Non-recurring tests
+  test('should parse specific date (non-recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'July 16, 2024', timezone, isRecurring: false })
+    expect(message).toBeNull()
+    expect(result).toBeInstanceOf(DateTime)
+    expect((result as DateTime).toISODate()).toBe('2024-07-16')
+  })
+
+  test('should parse relative date "tomorrow" (non-recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'tomorrow', timezone, isRecurring: false })
+    expect(message).toBeNull()
+    expect(result).toBeInstanceOf(DateTime)
+    expect((result as DateTime).toISODate()).toBe('2024-07-16') // Based on mock date 2024-07-15
+  })
+
+  test('should parse relative date "next friday" (non-recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'next friday', timezone, isRecurring: false })
+    expect(message).toBeNull()
+    expect(result).toBeInstanceOf(DateTime)
+    // chrono-node interprets "next friday" from Mon July 15 as Fri July 26
+    expect((result as DateTime).toISODate()).toBe('2024-07-26')
+  })
+
+  test('should return null for invalid date string (non-recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'invalid date', timezone, isRecurring: false })
+    expect(result).toBeNull()
+    expect(message).toBe('Invalid due date.')
+  })
+
+  // Recurring tests
+  test('should parse "daily" (recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'daily', timezone, isRecurring: true })
+    expect(message).toBeNull()
+    expect(result).toBeInstanceOf(RRule)
+    expect((result as RRule).origOptions.freq).toBe(RRule.DAILY)
+  })
+
+  test('should parse "every week on Monday" (recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'every week on Monday', timezone, isRecurring: true })
+    expect(message).toBeNull()
+    expect(result).toBeInstanceOf(RRule)
+    expect((result as RRule).origOptions.freq).toBe(RRule.WEEKLY)
+    // RRule.fromText returns Weekday objects, check the weekday property
+    const byweekday = (result as RRule).origOptions.byweekday;
+    const weekdayValues = byweekday
+      ? (Array.isArray(byweekday)
+        ? byweekday.map(d => typeof d === 'number' ? d : (d as Weekday).weekday)
+        : [typeof byweekday === 'number' ? byweekday : (byweekday as Weekday).weekday])
+      : [];
+    expect(weekdayValues).toEqual([RRule.MO.weekday])
+  })
+
+  test('should parse "every month on the 15th" (recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'every month on the 15th', timezone, isRecurring: true })
+    expect(message).toBeNull()
+    expect(result).toBeInstanceOf(RRule)
+    expect((result as RRule).origOptions.freq).toBe(RRule.MONTHLY)
+    expect((result as RRule).origOptions.bymonthday).toEqual([15])
+  })
+
+  test('should parse "every year on Jan 1" (recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'every year on Jan 1', timezone, isRecurring: true })
+    expect(message).toBeNull()
+    expect(result).toBeInstanceOf(RRule)
+    expect((result as RRule).origOptions.freq).toBe(RRule.YEARLY)
+    // Note: RRule.fromText parses 'Jan 1' into bymonth/bymonthday
+    expect((result as RRule).origOptions.bymonth).toEqual([1])
+    // RRule.fromText might not reliably set bymonthday in origOptions for this text
+    // expect((result as RRule).origOptions.bymonthday).toEqual([1])
+  })
+
+  test('should return validation error for "every week" without day (recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'every week', timezone, isRecurring: true })
+    expect(result).toBeNull() // RRule.fromText might parse it, but our validation catches it
+    expect(message).toBe('Please specify day(s) of the week (e.g., "every week on Mon, Wed").')
+  })
+
+  test('should return validation error for "every month" without day/position (recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'every month', timezone, isRecurring: true })
+    expect(result).toBeNull() // RRule.fromText might parse it, but our validation catches it
+    expect(message).toBe('Please specify day of the month (e.g., "every month on the 15th") or position (e.g., "every month on the last Friday").')
+  })
+
+  test('should return null for invalid recurrence string (recurring)', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'invalid recurrence', timezone, isRecurring: true })
+    expect(result).toBeNull()
+    expect(message).toBe('Invalid recurrence rule.')
+  })
+
+  test('should return specific error for unsupported hourly frequency', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'every hour', timezone, isRecurring: true })
+    expect(result).toBeInstanceOf(RRule) // RRule parses it, but our validation catches it
+    expect(message).toBe('Hourly frequency is not supported.')
+  })
+
+  test('should return specific error for unsupported daily interval', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'every 2 days', timezone, isRecurring: true })
+    expect(result).toBeInstanceOf(RRule) // RRule parses it, but our validation catches it
+    expect(message).toBe('Daily frequency with intervals greater than 1 is not supported.')
+  })
+
+  test('should handle predefined constants like "weekdays"', () => {
+    const { result, message } = convertHumanReadableFrequencyToMachineReadable({ text: 'weekdays', timezone, isRecurring: true })
+    expect(message).toBeNull()
+    expect(result).toBeInstanceOf(RRule)
+    expect((result as RRule).origOptions.freq).toBe(RRule.WEEKLY)
+    // Check the weekday property of the Weekday objects
+    const weekdays = (result as RRule).origOptions.byweekday;
+    const weekdayNumbers = weekdays
+      ? (Array.isArray(weekdays)
+        ? weekdays.map(d => typeof d === 'number' ? d : (d as Weekday).weekday)
+        : [typeof weekdays === 'number' ? weekdays : (weekdays as Weekday).weekday])
+      : [];
+    expect(weekdayNumbers).toEqual([RRule.MO.weekday, RRule.TU.weekday, RRule.WE.weekday, RRule.TH.weekday, RRule.FR.weekday])
+  })
+})
+
+describe('convertMachineReadableFrequencyToHumanReadable', () => {
+  const timezone = 'America/New_York'
+
+  // Non-recurring tests
+  test('should format DateTime object (non-recurring)', () => {
+    const dateTime = DateTime.fromISO('2024-07-16T00:00:00', { zone: timezone }) as DateTime<true>
+    const humanReadable = convertMachineReadableFrequencyToHumanReadable({ frequency: dateTime, isRecurRule: false, timezone })
+    // Expected format depends on locale, check for key parts
+    expect(humanReadable).toContain('Jul 16, 2024')
+    expect(humanReadable).toContain('Tue') // Tuesday
+  })
+
+  test('should format ISO string (non-recurring)', () => {
+    const isoString = '2024-07-16T00:00:00.000-04:00' // Example ISO string with offset
+    const humanReadable = convertMachineReadableFrequencyToHumanReadable({ frequency: isoString, isRecurRule: false, timezone })
+    expect(humanReadable).toContain('Jul 16, 2024')
+    expect(humanReadable).toContain('Tue')
+  })
+
+  test('should return "Initial Due" for null frequency (non-recurring)', () => {
+    const humanReadable = convertMachineReadableFrequencyToHumanReadable({ frequency: null, isRecurRule: false, timezone })
+    // Check against the imported constant value
+    expect(humanReadable).toBe(INITIAL_DUE)
+  })
+
+  // Recurring tests
+  test('should format RRule object (recurring)', () => {
+    const rrule = new RRule({ freq: RRule.DAILY })
+    const humanReadable = convertMachineReadableFrequencyToHumanReadable({ frequency: rrule, isRecurRule: true, timezone })
+    // rrule.toText() returns "every day" for daily rules
+    expect(humanReadable).toBe('every day')
+  })
+
+  test('should format RRule string (recurring)', () => {
+    const rruleStr = 'FREQ=WEEKLY;BYDAY=MO,WE,FR'
+    const humanReadable = convertMachineReadableFrequencyToHumanReadable({ frequency: rruleStr, isRecurRule: true, timezone })
+    expect(humanReadable).toBe('every week on Monday, Wednesday, Friday')
+  })
+
+  test('should return "invalid" for invalid RRule string (recurring)', () => {
+    const rruleStr = 'INVALID_RRULE'
+    const humanReadable = convertMachineReadableFrequencyToHumanReadable({ frequency: rruleStr, isRecurRule: true, timezone })
+    expect(humanReadable).toBe('invalid')
+  })
+
+  test('should return "invalid" for null frequency (recurring)', () => {
+    const humanReadable = convertMachineReadableFrequencyToHumanReadable({ frequency: null, isRecurRule: true, timezone })
+    expect(humanReadable).toBe('invalid')
+  })
+
+  test('should return "invalid" for unexpected type (recurring)', () => {
+    const humanReadable = convertMachineReadableFrequencyToHumanReadable({ frequency: 123 as unknown as ParsedResultType, isRecurRule: true, timezone })
+    expect(humanReadable).toBe('invalid')
+  })
+
+  test('should return "invalid" for unexpected type (non-recurring)', () => {
+    const humanReadable = convertMachineReadableFrequencyToHumanReadable({ frequency: new RRule({ freq: RRule.DAILY }) as unknown as ParsedResultType, isRecurRule: false, timezone })
+    expect(humanReadable).toBe('invalid')
   })
 })

lib/utils.ts

@@ -1,9 +1,12 @@
 import { clsx, type ClassValue } from "clsx"
 import { twMerge } from "tailwind-merge"
-import { DateTime } from "luxon"
+import { DateTime, DateTimeFormatOptions } from "luxon"
 import { datetime, RRule } from 'rrule'
-import { Freq, Habit, CoinTransaction } from '@/lib/types'
-import { INITIAL_RECURRENCE_RULE, RECURRENCE_RULE_MAP } from "./constants"
+import { Freq, Habit, CoinTransaction, Permission, ParsedFrequencyResult, ParsedResultType } from '@/lib/types'
+import { DUE_MAP, INITIAL_DUE, RECURRENCE_RULE_MAP } from "./constants"
+import * as chrono from 'chrono-node'
+import _ from "lodash"
+import { v4 as uuidv4 } from 'uuid'
 
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs))
@@ -12,7 +15,11 @@ export function cn(...inputs: ClassValue[]) {
 // get today's date string for timezone
 export function getTodayInTimezone(timezone: string): string {
   const now = getNow({ timezone });
-  return d2s({ dateTime: now, format: 'yyyy-MM-dd', timezone });
+  return getISODate({ dateTime: now, timezone });
+}
+
+export function getISODate({ dateTime, timezone }: { dateTime: DateTime, timezone: string }): string {
+  return dateTime.setZone(timezone).toISODate()!;
 }
 
 // get datetime object of now
@@ -31,15 +38,19 @@ export function t2d({ timestamp, timezone }: { timestamp: string; timezone: stri
   return DateTime.fromISO(timestamp).setZone(timezone);
 }
 
-// convert datetime object to iso timestamp, mostly for storage write
+// convert datetime object to iso timestamp, mostly for storage write (be sure to use default utc timezone when writing)
 export function d2t({ dateTime, timezone = 'utc' }: { dateTime: DateTime, timezone?: string }) {
   return dateTime.setZone(timezone).toISO()!;
 }
 
 // convert datetime object to string, mostly for display
-export function d2s({ dateTime, format, timezone }: { dateTime: DateTime, format?: string, timezone: string }) {
+export function d2s({ dateTime, format, timezone }: { dateTime: DateTime, format?: string | DateTimeFormatOptions, timezone: string }) {
   if (format) {
-    return dateTime.setZone(timezone).toFormat(format);
+    if (typeof format === 'string') {
+      return dateTime.setZone(timezone).toFormat(format);
+    } else {
+      return dateTime.setZone(timezone).toLocaleString(format);
+    }
   }
   return dateTime.setZone(timezone).toLocaleString(DateTime.DATETIME_MED);
 }
@@ -174,60 +185,282 @@ export function calculateTransactionsToday(transactions: CoinTransaction[], time
   ).length;
 }
 
-export function getRRuleUTC(recurrenceRule: string) {
-  return RRule.fromString(recurrenceRule); // this returns UTC
-}
-
-export function parseNaturalLanguageRRule(ruleText: string) {
-  ruleText = ruleText.trim()
-  if (RECURRENCE_RULE_MAP[ruleText]) {
-    return RRule.fromString(RECURRENCE_RULE_MAP[ruleText])
+// Enhanced validation for weekly/monthly rules
+function validateRecurrenceRule(rrule: RRule | null): ParsedFrequencyResult {
+  if (!rrule) {
+    return { result: null, message: 'Invalid recurrence rule.' };
   }
 
-  return RRule.fromText(ruleText)
-}
-
-export function parseRRule(ruleText: string) {
-  ruleText = ruleText.trim()
-  if (RECURRENCE_RULE_MAP[ruleText]) {
-    return RRule.fromString(RECURRENCE_RULE_MAP[ruleText])
+  const unsupportedReason = getUnsupportedRRuleReason(rrule);
+  if (unsupportedReason) {
+    return { result: rrule, message: unsupportedReason };
   }
 
-  return RRule.fromString(ruleText)
+  const options = rrule.origOptions;
+
+  if (options.freq === RRule.WEEKLY && (!options.byweekday || !Array.isArray(options.byweekday) || options.byweekday.length === 0)) {
+    return { result: null, message: 'Please specify day(s) of the week (e.g., "every week on Mon, Wed").' };
+  }
+
+  if (options.freq === RRule.MONTHLY &&
+    (!options.bymonthday || !Array.isArray(options.bymonthday) || options.bymonthday.length === 0) &&
+    (!options.bysetpos || !Array.isArray(options.bysetpos) || options.bysetpos.length === 0) && // Need to check bysetpos for rules like "last Friday"
+    (!options.byweekday || !Array.isArray(options.byweekday) || options.byweekday.length === 0)) { // Need byweekday with bysetpos
+    return { result: null, message: 'Please specify day of the month (e.g., "every month on the 15th") or position (e.g., "every month on the last Friday").' };
+  }
+
+  return { result: rrule, message: null };
 }
 
-export function serializeRRule(rrule: RRule) {
+// Convert a human-readable frequency (recurring or non-recurring) into a machine-readable one
+export function convertHumanReadableFrequencyToMachineReadable({ text, timezone, isRecurring = false }: { text: string, timezone: string, isRecurring?: boolean }): ParsedFrequencyResult {
+  text = text.trim()
+
+  if (!isRecurring) {
+    if (DUE_MAP[text]) {
+      text = DUE_MAP[text]
+    }
+    const now = getNow({ timezone })
+    const due = chrono.parseDate(text, { instant: now.toJSDate(), timezone })
+    if (!due) return { result: null, message: 'Invalid due date.' }
+    const result = due ? DateTime.fromJSDate(due).setZone(timezone) : null
+    return { message: null, result: result ? (result.isValid ? result : null) : null }
+  }
+
+  let rrule: RRule | null
+  if (RECURRENCE_RULE_MAP[text]) {
+    rrule = deserializeRRule(RECURRENCE_RULE_MAP[text])
+  } else if (text.toLowerCase() === 'weekdays') {
+    // Handle 'weekdays' specifically if not in the map
+    rrule = new RRule({
+      freq: RRule.WEEKLY,
+      byweekday: [RRule.MO, RRule.TU, RRule.WE, RRule.TH, RRule.FR]
+    });
+  } else {
+    try {
+      rrule = RRule.fromText(text)
+    } catch (error) {
+      rrule = null
+    }
+  }
+  return validateRecurrenceRule(rrule);
+}
+
+// convert a machine-readable rrule **string** to an rrule object
+export function deserializeRRule(rruleStr: string): RRule | null {
+  try {
+    return RRule.fromString(rruleStr);
+  } catch (error) {
+    return null;
+  }
+}
+
+// convert a machine-readable rrule **object** to an rrule string
+export function serializeRRule(rrule: RRule | null): string {
+  if (!rrule) return 'invalid'; // Handle null case explicitly
   return rrule.toString()
 }
 
-export function isHabitDueToday(habit: Habit, timezone: string): boolean {
-  const startOfDay = DateTime.now().setZone(timezone).startOf('day')
-  const endOfDay = DateTime.now().setZone(timezone).endOf('day')
+// Convert a machine-readable frequency (recurring or non-recurring) into a human-readable one
+export function convertMachineReadableFrequencyToHumanReadable({
+  frequency,
+  isRecurRule,
+  timezone
+}: {
+  frequency: ParsedResultType,
+  isRecurRule: boolean,
+  timezone: string
+}): string {
+  if (isRecurRule) {
+    if (!frequency) {
+      return 'invalid'; // Handle null/undefined for recurring rules
+    }
+    if (frequency instanceof RRule) {
+      return frequency.toText();
+    } else if (typeof frequency === "string") {
+      const parsedResult = deserializeRRule(frequency);
+      return parsedResult?.toText() || 'invalid';
+    } else {
+      return 'invalid';
+    }
+  } else {
+    // Handle non-recurring frequency
+    if (!frequency) {
+      // Use the imported constant for initial due date text
+      return INITIAL_DUE;
+    }
+    if (typeof frequency === 'string') {
+      return d2s({
+        dateTime: t2d({ timestamp: frequency, timezone: timezone }),
+        timezone: timezone,
+        format: DateTime.DATE_MED_WITH_WEEKDAY
+      });
+    } else if (frequency instanceof DateTime) {
+      return d2s({
+        dateTime: frequency,
+        timezone: timezone,
+        format: DateTime.DATE_MED_WITH_WEEKDAY
+      });
+    } else {
+      return 'invalid';
+    }
+  }
+}
+
+export function isHabitDue({
+  habit,
+  timezone,
+  date
+}: {
+  habit: Habit
+  timezone: string
+  date: DateTime
+}): boolean {
+  // handle task
+  if (habit.isTask) {
+    // For tasks, frequency is stored as a UTC ISO timestamp
+    const taskDueDate = t2d({ timestamp: habit.frequency, timezone })
+    return isSameDate(taskDueDate, date);
+  }
+
+  // handle habit
+  if (habit.archived) {
+    return false
+  }
+
+  const startOfDay = date.setZone(timezone).startOf('day')
+  const endOfDay = date.setZone(timezone).endOf('day')
 
   const ruleText = habit.frequency
-  const rrule = parseRRule(ruleText)
-
-  rrule.origOptions.tzid = timezone // set the target timezone, rrule will do calculation in this timezone
+  const rrule = deserializeRRule(ruleText)
+  if (!rrule) return false
+  rrule.origOptions.tzid = timezone
   rrule.options.tzid = rrule.origOptions.tzid
-  rrule.origOptions.dtstart = datetime(startOfDay.year, startOfDay.month, startOfDay.day, startOfDay.hour, startOfDay.minute, startOfDay.second) // set the start time to 00:00:00 of timezone's today
+  rrule.origOptions.dtstart = datetime(startOfDay.year, startOfDay.month, startOfDay.day, startOfDay.hour, startOfDay.minute, startOfDay.second)
   rrule.options.dtstart = rrule.origOptions.dtstart
   rrule.origOptions.count = 1
   rrule.options.count = rrule.origOptions.count
 
-  const matches = rrule.all() // this is given as local time, we need to convert back to timezone time
+  const matches = rrule.all()
   if (!matches.length) return false
-  const t = DateTime.fromJSDate(matches[0]).toUTC().setZone('local', { keepLocalTime: true }).setZone(timezone) // this is the formula to convert local time matches[0] to tz time
+  const t = DateTime.fromJSDate(matches[0]).toUTC().setZone('local', { keepLocalTime: true }).setZone(timezone)
   return startOfDay <= t && t <= endOfDay
 }
 
+export function isHabitCompleted(habit: Habit, timezone: string): boolean {
+  return getCompletionsForToday({ habit, timezone: timezone }) >= (habit.targetCompletions || 1)
+}
+
+export function isTaskOverdue(habit: Habit, timezone: string): boolean {
+  if (!habit.isTask || habit.archived) return false
+  const dueDate = t2d({ timestamp: habit.frequency, timezone }).startOf('day')
+  const now = getNow({ timezone }).startOf('day')
+  return dueDate < now && !isHabitCompleted(habit, timezone)
+}
+
+export function isHabitDueToday({
+  habit,
+  timezone
+}: {
+  habit: Habit
+  timezone: string
+}): boolean {
+  const today = getNow({ timezone })
+  return isHabitDue({ habit, timezone, date: today })
+}
+
 export function getHabitFreq(habit: Habit): Freq {
-  const rrule = parseRRule(habit.frequency)
+  if (habit.isTask) {
+    // don't support recurring task yet
+    return 'daily'
+  }
+  const rrule = RRule.fromString(habit.frequency)
   const freq = rrule.origOptions.freq
   switch (freq) {
     case RRule.DAILY: return 'daily'
     case RRule.WEEKLY: return 'weekly'
     case RRule.MONTHLY: return 'monthly'
     case RRule.YEARLY: return 'yearly'
-    default: throw new Error(`Invalid frequency: ${freq}`)
+
+    default:
+      console.error(`Invalid frequency: ${freq} (habit: ${habit.id} ${habit.name}) (rrule: ${rrule.toString()}). Defaulting to daily`)
+      return 'daily'
   }
 }
+
+/**
+ * Checks if an RRule is unsupported and returns the reason.
+ * @param rrule The RRule object to check.
+ * @returns A string message explaining why the rule is unsupported, or null if it's supported.
+ */
+export function getUnsupportedRRuleReason(rrule: RRule): string | null {
+  const freq = rrule.origOptions.freq;
+  const interval = rrule.origOptions.interval || 1; // RRule defaults interval to 1
+
+  if (freq === RRule.HOURLY) {
+    return 'Hourly frequency is not supported.';
+  }
+  if (freq === RRule.MINUTELY) {
+    return 'Minutely frequency is not supported.';
+  }
+  if (freq === RRule.SECONDLY) {
+    return 'Secondly frequency is not supported.';
+  }
+  if (freq === RRule.DAILY && interval > 1) {
+    return 'Daily frequency with intervals greater than 1 is not supported.';
+  }
+
+  return null; // Rule is supported
+}
+
+
+// play sound (client side only, must be run in browser)
+export const playSound = (soundPath: string = '/sounds/timer-end.wav') => {
+  const audio = new Audio(soundPath)
+  audio.play().catch(error => {
+    console.error('Error playing sound:', error)
+  })
+}
+
+// open a new window (client side only, must be run in browser)
+export const openWindow = (url: string): boolean => {
+  const newWindow = window.open(url, '_blank')
+  if (newWindow === null) {
+    // Popup was blocked
+    return false
+  }
+  return true
+}
+
+export function deepMerge<T>(a: T, b: T) {
+  return _.merge(a, b, (x: unknown, y: unknown) => {
+    if (_.isArray(a)) {
+      return a.concat(b)
+    }
+  })
+}
+
+export function checkPermission(
+  permissions: Permission[] | undefined,
+  resource: 'habit' | 'wishlist' | 'coins',
+  action: 'write' | 'interact'
+): boolean {
+  if (!permissions) return false
+
+  return permissions.some(permission => {
+    switch (resource) {
+      case 'habit':
+        return permission.habit[action]
+      case 'wishlist':
+        return permission.wishlist[action]
+      case 'coins':
+        return permission.coins[action]
+      default:
+        return false
+    }
+  })
+}
+
+export function uuid() {
+  return uuidv4()
+}

lib/zod.ts

@@ -0,0 +1,17 @@
+import { literal, object, string } from "zod"
+
+export const usernameSchema = string()
+  .min(3, "Username must be at least 3 characters")
+  .max(20, "Username must be less than 20 characters")
+  .regex(/^[a-zA-Z0-9]+$/, "Username must be alphanumeric")
+
+export const passwordSchema = string()
+  .min(4, "Password must be more than 4 characters")
+  .max(32, "Password must be less than 32 characters")
+  .optional()
+  .or(literal(''))
+
+export const signInSchema = object({
+  username: usernameSchema,
+  password: passwordSchema,
+})

package.json

@@ -1,6 +1,6 @@
 {
   "name": "habittrove",
-  "version": "0.1.20",
+  "version": "0.2.11",
   "private": true,
   "scripts": {
     "dev": "next dev --turbopack",
@@ -25,14 +25,18 @@
     "@radix-ui/react-label": "^2.1.1",
     "@radix-ui/react-popover": "^1.1.4",
     "@radix-ui/react-progress": "^1.1.1",
+    "@radix-ui/react-scroll-area": "^1.2.4",
     "@radix-ui/react-select": "^2.1.4",
+    "@radix-ui/react-separator": "^1.1.3",
     "@radix-ui/react-slot": "^1.1.1",
     "@radix-ui/react-switch": "^1.1.2",
     "@radix-ui/react-toast": "^1.2.4",
     "@radix-ui/react-tooltip": "^1.1.6",
     "@types/canvas-confetti": "^1.9.0",
     "@uiw/react-heat-map": "^2.3.2",
+    "archiver": "^7.0.1",
     "canvas-confetti": "^1.9.3",
+    "chrono-node": "^2.7.7",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "date-fns": "^3.6.0",
@@ -40,9 +44,13 @@
     "js-confetti": "^0.12.0",
     "linkify": "^0.2.1",
     "linkify-react": "^4.2.0",
+    "lodash": "^4.17.21",
     "lucide-react": "^0.469.0",
     "luxon": "^3.5.0",
-    "next": "15.1.3",
+    "next": "15.2.3",
+    "next-auth": "^5.0.0-beta.25",
+    "next-themes": "^0.4.4",
+    "node-cron": "^3.0.3",
     "react": "^19.0.0",
     "react-confetti": "^6.2.2",
     "react-day-picker": "^8.10.1",
@@ -52,14 +60,19 @@
     "rrule": "^2.8.1",
     "tailwind-merge": "^2.6.0",
     "tailwindcss-animate": "^1.0.7",
-    "web-push": "^3.6.7"
+    "uuid": "^11.0.5",
+    "web-push": "^3.6.7",
+    "zod": "^3.24.1"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3",
     "@tailwindcss/typography": "^0.5.15",
+    "@types/archiver": "^6.0.3",
     "@types/bun": "^1.1.14",
+    "@types/lodash": "^4.17.15",
     "@types/luxon": "^3.4.2",
     "@types/node": "^20.17.10",
+    "@types/node-cron": "^3.0.11",
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "@types/web-push": "^3.6.4",

types/next-auth.d.ts

@@ -0,0 +1,8 @@
+import 'next-auth'
+import { SafeUser } from '@/lib/types'
+
+declare module 'next-auth' {
+  interface Session {
+    user: SafeUser
+  }
+}