Files

Max 3fbbb1a93b Initial commit: Brachnha Insight project setup

- Next.js 14+ with App Router and TypeScript
- Tailwind CSS and ShadCN UI styling
- Zustand state management
- Dexie.js for IndexedDB (local-first data)
- Auth.js v5 for authentication
- BMAD framework integration

Co-Authored-By: Claude <noreply@anthropic.com>

2026-01-26 12:28:43 +07:00

31 KiB

Raw Blame History

Story 3.4: PWA Install Prompt & Manifest

Status: done

Story

As a user, I want to install the app to my home screen, So that it feels like a native app.

Acceptance Criteria

Valid Web App Manifest
- Given the user visits the web app
- When the browser parses the site
- Then it finds a valid manifest.json (or generated via manifest.ts) with correct icons, name ("Test01"), and display: standalone settings
Custom Install UI on Engagement
- Given the user has engaged with the app (e.g., completed 1 session)
- When the browser supports it (beforeinstallprompt event)
- Then a custom "Install App" UI element appears (non-intrusive)
- And clicking it triggers the native install prompt
Standalone Mode Verification
- Given the app is installed
- When it launches from Home Screen
- Then it opens without the browser URL bar (Standalone mode)

Tasks / Subtasks

Create/Generate Web App Manifest
- Create public/manifest.json OR src/app/manifest.ts (Next.js 16+ convention)
- Configure app name: "Test01"
- Configure short_name: "Test01"
- Set display: "standalone"
- Set orientation: "portrait" (for mobile)
- Set background_color and theme_color (Morning Mist palette)
- Configure start_url: "/" (or appropriate entry point)
- Add icon references (512x512 and 192x192 minimum)
Create PWA Icon Assets
- Create or generate app icons in required sizes:
  - 192x192 (android adaptive icon)
  - 512x512 (standard icon)
  - Optional: maskable icon for safe area insets
- Place icons in public/icons/ directory
- Ensure icons match "Morning Mist" theme branding
Configure Next.js for PWA
- Update next.config.ts to enable PWA metadata
- Add manifest reference to app layout metadata
- Add theme-color meta tag to layout
- Add apple-touch-icon link (for iOS fallback)
Create InstallPrompt Store (Zustand)
- Create src/lib/store/install-prompt-store.ts
- State:
  - isInstallable: boolean (whether beforeinstallprompt fired)
  - isInstalled: boolean (app running in standalone mode)
  - deferredPrompt: BeforeInstallPromptEvent | null (saved event)
- Actions:
  - setDeferredPrompt(event) - save the beforeinstallprompt event
  - promptInstall() - trigger the saved prompt
  - dismissInstall() - clear the deferred prompt
- Use atomic selectors for performance
Create InstallPrompt Service
- Create src/services/install-prompt-service.ts
- Implement initializeInstallPrompt() method
- Add beforeinstallprompt event listener to window
- Prevent default browser install prompt
- Save event to InstallPromptStore
- Implement checkIfInstalled() - detects standalone mode via window.matchMedia
Create InstallPromptButton Component
- Create src/components/features/pwa/InstallPromptButton.tsx
- Show button only when isInstallable AND not isInstalled
- Button style: Non-intrusive, matches Morning Mist theme
- Position: Fixed bottom-right or in navigation
- Icon: Download/Install icon (Lucide)
- On click: call InstallPromptService.promptInstall()
Create Engagement Tracker (for showing prompt)
- Create src/services/engagement-tracker.ts
- Track session completions in IndexedDB
- Return whether user has engaged (completed 1+ sessions)
- Used to conditionally show InstallPromptButton
Initialize Install Prompt in App Layout
- Modify src/app/layout.tsx
- Initialize InstallPromptService on mount
- Check standalone mode on mount
- Render InstallPromptButton conditionally
Test PWA Install Flow End-to-End
- Unit test: InstallPromptStore state management
- Unit test: InstallPromptService event handling
- Unit test: checkIfInstalled() returns correct status
- Integration test: beforeinstallprompt event saved to store
- Integration test: promptInstall() triggers native prompt
- Manual test: Install on Chrome Desktop
- Manual test: Install on Chrome Android
- Manual test: Verify standalone mode launches correctly
- Manual test: iOS fallback (Add to Home Screen instructions)

Senior Developer Review (AI)

Reviewer: Max on 2026-01-23

Summary: Automatic code review identified critical issues with the initial implementation, specifically regarding Server-Side Rendering compatibility in layout.tsx. These have been addressed by moving initialization logic to a client component. Configuration gaps were also filled.

Findings & Fixes:

CRITICAL: InstallPromptService initialization logic was in src/app/layout.tsx (Server Component), which would fail at runtime.
- Fix: Created src/components/features/pwa/PWAInitializer.tsx (Client Component) to handle all client-side service initialization.
- Fix: Updated src/app/layout.tsx to import and usage PWAInitializer.
MEDIUM: next.config.ts was missing required optimization settings.
- Fix: Added optimizePackageImports: ['lucide-react'].
MEDIUM: InstallPromptButton was bypassing the Service Layer for the prompt action.
- Fix: Refactored to call InstallPromptService.promptInstall() directly.

Outcome: Approved with automated fixes applied. Use the new PWAInitializer pattern for all future client-side service setups.

Dev Notes

Architecture Compliance (CRITICAL)

Logic Sandwich Pattern - DO NOT VIOLATE:

UI Components MUST NOT directly handle beforeinstallprompt event
All install prompt logic MUST go through InstallPromptService service layer
InstallPromptService manages event storage and prompt triggering
Services return plain success/failure, not browser events directly

State Management - Atomic Selectors Required:

// GOOD - Atomic selectors
const isInstallable = useInstallPromptStore(s => s.isInstallable);
const isInstalled = useInstallPromptStore(s => s.isInstalled);

// BAD - Causes unnecessary re-renders
const { isInstallable, isInstalled } = useInstallPromptStore();

Local-First Data Boundary:

Install prompt state is transient (browser session)
Engagement tracking (session count) is stored in IndexedDB
No server sync required for install prompt logic

Architecture Implementation Details

Story Purpose: This story implements PWA installability - enabling users to install the app to their home screen for a native-app experience. The custom install prompt provides better UX than the browser's default prompt, appearing only after the user has engaged with the app.

PWA Install Flow:

User visits app
    ↓
Browser detects manifest.json
    ↓
User engages (completes 1 session)
    ↓
Browser fires beforeinstallprompt event
    ↓
InstallPromptService captures event (prevents default)
    ↓
Store setDeferredPrompt(event)
    ↓
InstallPromptButton appears (non-intrusive)
    ↓
User clicks "Install App" button
    ↓
InstallPromptService.promptInstall() calls event.prompt()
    ↓
User accepts native browser prompt
    ↓
App installed to home screen

Manifest Configuration (Next.js 16+): For Next.js 16, use the built-in manifest generation:

// src/app/manifest.ts
import { MetadataRoute } from 'next';

export default function manifest(): MetadataRoute.Manifest {
  return {
    name: 'Test01',
    short_name: 'Test01',
    description: 'Turn your daily learning struggles into polished content',
    start_url: '/',
    display: 'standalone',
    background_color: '#F8FAFC',
    theme_color: '#64748B',
    orientation: 'portrait',
    icons: [
      {
        src: '/icons/icon-192x192.png',
        sizes: '192x192',
        type: 'image/png',
        purpose: 'any maskable'
      },
      {
        src: '/icons/icon-512x512.png',
        sizes: '512x512',
        type: 'image/png',
        purpose: 'any maskable'
      }
    ]
  };
}

Next.js Config for PWA:

// next.config.ts
import type { NextConfig } from 'next';

const nextConfig: NextConfig = {
  // Ensure manifest is properly served
  experimental: {
    optimizePackageImports: ['lucide-react']
  }
};

export default nextConfig;

Layout Metadata (src/app/layout.tsx):

// Add to existing layout metadata
export const metadata: Metadata = {
  manifest: '/manifest.json', // For manifest.ts, Next.js handles this
  themeColor: '#64748B',
  appleMobileWebAppCapable: 'yes',
  appleMobileWebAppStatusBarStyle: 'default',
  // ... existing metadata
};

InstallPromptStore Implementation:

// src/lib/store/install-prompt-store.ts
import { create } from 'zustand';

interface BeforeInstallPromptEvent extends Event {
  prompt: () => Promise<void>;
  userChoice: Promise<{ outcome: 'accepted' | 'dismissed' }>;
}

interface InstallPromptState {
  isInstallable: boolean;
  isInstalled: boolean;
  deferredPrompt: BeforeInstallPromptEvent | null;

  setDeferredPrompt: (event: BeforeInstallPromptEvent | null) => void;
  setInstallable: (installable: boolean) => void;
  setInstalled: (installed: boolean) => void;
  promptInstall: () => Promise<boolean>;
  dismissInstall: () => void;
}

export const useInstallPromptStore = create<InstallPromptState>((set, get) => ({
  isInstallable: false,
  isInstalled: false,
  deferredPrompt: null,

  setDeferredPrompt: (event) => set({ deferredPrompt: event, isInstallable: !!event }),

  setInstallable: (installable) => set({ isInstallable: installable }),

  setInstalled: (installed) => set({ isInstalled: installed }),

  promptInstall: async () => {
    const { deferredPrompt } = get();
    if (!deferredPrompt) return false;

    deferredPrompt.prompt();
    const { outcome } = await deferredPrompt.userChoice;

    if (outcome === 'accepted') {
      set({ isInstalled: true, deferredPrompt: null, isInstallable: false });
    } else {
      set({ deferredPrompt: null, isInstallable: false });
    }

    return outcome === 'accepted';
  },

  dismissInstall: () => set({ deferredPrompt: null, isInstallable: false })
}));

InstallPromptService Implementation:

// src/services/install-prompt-service.ts
import { useInstallPromptStore } from '@/lib/store/install-prompt-store';

type BeforeInstallPromptEvent = Event & {
  prompt: () => Promise<void>;
  userChoice: Promise<{ outcome: 'accepted' | 'dismissed' }>;
};

export class InstallPromptService {
  private static initialized = false;

  static initialize(): void {
    if (this.initialized) return;
    this.initialized = true;

    // Check if already installed (standalone mode)
    this.checkInstalledStatus();

    // Listen for beforeinstallprompt event
    if (typeof window !== 'undefined') {
      window.addEventListener('beforeinstallprompt', (e) => {
        e.preventDefault();
        const event = e as BeforeInstallPromptEvent;
        useInstallPromptStore.getState().setDeferredPrompt(event);
      });

      // Listen for appinstalled event (user accepted install)
      window.addEventListener('appinstalled', () => {
        useInstallPromptStore.getState().setInstalled(true);
      });
    }
  }

  static checkInstalledStatus(): void {
    if (typeof window === 'undefined') return;

    // Check if running in standalone mode
    const isStandalone =
      window.matchMedia('(display-mode: standalone)').matches ||
      (window.navigator as any).standalone === true; // iOS Safari

    useInstallPromptStore.getState().setInstalled(isStandalone);
  }

  static async promptInstall(): Promise<boolean> {
    return await useInstallPromptStore.getState().promptInstall();
  }
}

InstallPromptButton Component:

// src/components/features/pwa/InstallPromptButton.tsx
import { Download } from 'lucide-react';
import { useInstallPromptStore } from '@/lib/store/install-prompt-store';
import { Button } from '@/components/ui/button';
import { useEngagementStore } from '@/lib/store/engagement-store';

export function InstallPromptButton() {
  const isInstallable = useInstallPromptStore(s => s.isInstallable);
  const isInstalled = useInstallPromptStore(s => s.isInstalled);
  const promptInstall = useInstallPromptStore(s => s.promptInstall);
  const sessionCount = useEngagementStore(s => s.completedSessions);

  // Only show if:
  // 1. Browser supports install prompt
  // 2. App is not already installed
  // 3. User has engaged (completed at least 1 session)
  const shouldShow = isInstallable && !isInstalled && sessionCount > 0;

  if (!shouldShow) return null;

  const handleInstall = async () => {
    const accepted = await promptInstall();
    if (accepted) {
      // Show success feedback
      console.log('App installed successfully');
    }
  };

  return (
    <Button
      onClick={handleInstall}
      variant="outline"
      size="sm"
      className="fixed bottom-20 right-4 shadow-lg animate-fade-in"
    >
      <Download className="w-4 h-4 mr-2" />
      Install App
    </Button>
  );
}

EngagementTracker for Session Count:

// src/services/engagement-tracker.ts
import { db } from '@/lib/db';

// For MVP, use existing drafts count as engagement metric
// Post-MVP: create separate engagement tracking table
export class EngagementTracker {
  static async getCompletedSessionCount(): Promise<number> {
    const count = await db.drafts
      .where('status')
      .equals('completed')
      .count();
    return count;
  }

  static hasEngaged(): Promise<boolean> {
    return this.getCompletedSessionCount().then(count => count > 0);
  }
}

Previous Story Intelligence

From Story 3.3 (Offline Sync Queue):

OfflineStore Pattern: Network status detection via navigator.onLine
Logic Sandwich: Services handle all business logic, UI just displays state
Atomic Selectors: All Zustand stores use atomic selectors
Key Learning: Initialize services in layout.tsx on app mount

From Story 3.2 (Deletion):

Database Schema v3: SyncQueue table added with proper migration
Service Layer Pattern: DraftService for all draft operations
Key Learning: All data operations go through service layer

From Epic 1 (Chat):

Database Foundation: Dexie.js with IndexedDB
Zustand Pattern: Separate stores for different concerns
Key Learning: Use feature folders for organized components

UX Design Specifications

From UX Design Document:

Install Prompt Pattern:

Non-intrusive appearance (not modal, not blocking)
Shows only after user engagement (1+ sessions completed)
Bottom-right fixed position (out of way but visible)
Dismissible (user can ignore without breaking app)

Visual Feedback:

Button Style: Outline variant, Morning Mist colors
Icon: Download icon from Lucide React
Animation: Subtle fade-in when appears
Hover: Subtle highlight to indicate interactivity

Accessibility:

aria-label="Install Test01 app to home screen" for button
Focus visible for keyboard navigation
High contrast text (WCAG AA compliant)

iOS Fallback: iOS Safari doesn't support beforeinstallprompt. Show instructions:

"To install: Tap Share, then 'Add to Home Screen'"

This should be shown in a subtle tooltip or help menu item for iOS users.

Testing Requirements

Unit Tests:

InstallPromptStore.setDeferredPrompt() sets isInstallable to true
InstallPromptStore.setInstalled() updates isInstalled state
InstallPromptStore.promptInstall() calls deferredPrompt.prompt()
InstallPromptStore.promptInstall() returns true when accepted
InstallPromptStore.promptInstall() returns false when dismissed
InstallPromptStore.dismissInstall() clears deferredPrompt
InstallPromptService.initialize() adds event listeners
InstallPromptService.checkInstalledStatus() detects standalone mode
EngagementTracker.hasEngaged() returns true when drafts exist

Integration Tests:

beforeinstallprompt event updates InstallPromptStore
InstallPromptButton appears when isInstallable=true and sessionCount>0
InstallPromptButton does NOT appear when isInstalled=true
Clicking button triggers promptInstall()
Standalone mode detected via window.matchMedia

Manual Tests (Browser Testing):

Chrome Desktop: Verify install prompt appears after engagement
Chrome Android: Install to home screen, verify standalone mode
Edge Desktop: Same as Chrome
Safari Desktop: No prompt (beforeinstallprompt not supported)
Safari iOS: Verify "Add to Home Screen" instructions shown
Firefox Desktop: Verify prompt appears

Lighthouse PWA Audit:

All PWA criteria should pass after implementation
Installability: PASS
Manifest: PASS
Service Worker: PASS (from previous story's offline support)
HTTPS: PASS (deployment requirement)

Performance Requirements

NFR-02 Compliance (App Load Time):

Manifest.json must be < 5KB (small metadata)
Icon assets should be optimized (lossless compression)
InstallPromptService initialization < 50ms

NFR-05 Compliance (Offline Behavior):

Install prompt works offline after first load
Manifest is cached by service worker
Icons are cached by service worker

Security & Privacy Requirements

Manifest Security:

start_url should use HTTPS
No sensitive data in manifest
scope should limit app's reach

Install Prompt Safety:

beforeinstallprompt event is browser-controlled (secure)
User must explicitly accept install (no forced installs)
Install happens on user's device (local-only)

Project Structure Notes

Following Feature-First Lite Pattern:

src/
  components/
    features/
      pwa/                 # NEW: PWA-specific components
        InstallPromptButton.tsx
        index.ts
  lib/
    store/
      install-prompt-store.ts    # NEW: Install prompt state
      engagement-store.ts        # NEW: Session tracking (or reuse existing)
  services/
    install-prompt-service.ts    # NEW: Install prompt logic
    engagement-tracker.ts        # NEW: Engagement detection
  app/
    manifest.ts                  # NEW: PWA manifest (Next.js 16+)
    layout.tsx                   # MODIFY: Initialize service

Public Assets:

public/
  icons/
    icon-192x192.png    # NEW: 192x192 app icon
    icon-512x512.png    # NEW: 512x512 app icon
    maskable-icon.png   # OPTIONAL: Maskable icon for Android

Files to Create:

src/app/manifest.ts - PWA manifest configuration
src/lib/store/install-prompt-store.ts - Install prompt state management
src/lib/store/install-prompt-store.test.ts - Store tests
src/services/install-prompt-service.ts - Install prompt service
src/services/install-prompt-service.test.ts - Service tests
src/components/features/pwa/InstallPromptButton.tsx - Install button component
src/components/features/pwa/InstallPromptButton.test.tsx - Button tests
src/components/features/pwa/index.ts - Feature exports
src/services/engagement-tracker.ts - Engagement detection service
src/services/engagement-tracker.test.ts - Engagement tests

Files to Modify:

src/app/layout.tsx - Initialize InstallPromptService, add manifest metadata
next.config.ts - Ensure PWA support is enabled

Icon Assets to Create:

public/icons/icon-192x192.png - 192x192 app icon
public/icons/icon-512x512.png - 512x512 app icon

Browser Compatibility Notes

beforeinstallprompt Support:

Chrome/Edge: Supported (Desktop & Android)
Firefox: Supported (Desktop)
Safari: NOT supported (iOS or Desktop)

iOS Safari Fallback: iOS doesn't support beforeinstallprompt. Users must:

Tap Share button
Scroll down and tap "Add to Home Screen"
Tap "Add"

For iOS, show a subtle help icon or tooltip with instructions.

Standalone Detection:

// Chrome/Edge/Firefox
window.matchMedia('(display-mode: standalone)').matches

// iOS Safari
window.navigator.standalone === true

Latest Technical Information (2026)

Next.js 16 PWA Support (Jan 2026):

Use src/app/manifest.ts for manifest generation
Next.js automatically generates manifest.json at build time
No need for manual manifest.json file in public
Metadata API handles manifest linking

beforeinstallprompt Event (2026):

Still the standard for custom install prompts
Event fires only when PWA criteria are met
Must prevent default to show custom UI later
Event is valid until user dismisses or installs

PWA Installability Criteria (2026):

Valid manifest.json with name, short_name, icons
Service Worker registered (from story 3.3)
HTTPS served (or localhost for development)
At least one visit to site (no first-install prompts)

Recent Changes:

Chrome 130+: Improved install heuristics (fewer automatic prompts)
Safari 18+: Still no beforeinstallprompt, but improved "Add to Home Screen" UX
Edge: Same as Chrome (Chromium-based)

References

Epic Reference:

Epic 3: "My Legacy" - History, Offline Sync & PWA Polish
Story 3.4: PWA Install Prompt & Manifest
FR-12: "System actively prompts users to 'Add to Home Screen' (A2HS) upon meeting engagement criteria"

Architecture Documents:

Previous Stories:

Story 3.3: Offline Sync Queue - OfflineStore, SyncManager patterns
Story 3.2: Deletion & Management - Service layer patterns
Story 1.1: Local-First Setup - Dexie foundation

External References:

Dev Agent Record

Agent Model Used

Claude Opus 4.5 (model ID: 'claude-opus-4-5-20251101')

Debug Log References

Session file: /tmp/claude/-home-maximilienmao-Projects-Test01/edb6d0a1-65e2-4871-b93f-126aaba44907/scratchpad

Completion Notes List

Story Analysis Completed:

Extracted story requirements from Epic 3, Story 3.4
Analyzed Stories 3.3, 3.2, 3.1 for established patterns
Reviewed architecture for Service Layer and State Management compliance
Researched latest Next.js 16 PWA patterns and beforeinstallprompt best practices
Identified all files to create and modify

Implementation Context Summary:

Story Purpose: This story implements PWA installability with a custom install prompt. It enables users to install Test01 to their home screen for a native-app experience. The custom prompt appears only after user engagement (1+ completed sessions) for better UX than the browser's default prompt.

Key Technical Decisions:

Manifest Generation: Use Next.js 16's src/app/manifest.ts (built-in support)
InstallPromptService: Service layer for beforeinstallprompt event handling
InstallPromptStore: Zustand store for install state management
Engagement Detection: Use completed drafts count as engagement metric
Non-Intrusive UI: Fixed bottom-right button, not modal/overlay
iOS Fallback: Show "Add to Home Screen" instructions (iOS doesn't support beforeinstallprompt)

Dependencies:

No new external dependencies required
Uses existing Zustand for state management
Uses existing Dexie for engagement tracking (drafts count)
Browser's beforeinstallprompt API

Integration Points:

InstallPromptService initialized in app layout
Manifest.ts generates manifest.json automatically
InstallPromptButton in layout (conditionally rendered)
Engagement tracker uses existing drafts table

Files to Create:

src/app/manifest.ts - PWA manifest configuration
src/lib/store/install-prompt-store.ts - Install state management
src/services/install-prompt-service.ts - Install prompt service
src/components/features/pwa/InstallPromptButton.tsx - Install button
src/services/engagement-tracker.ts - Engagement detection
Test files for all above

Files to Modify:

src/app/layout.tsx - Initialize service, add metadata

Icon Assets:

public/icons/icon-192x192.png
public/icons/icon-512x512.png

PWA Install Data Flow:

App loads → InstallPromptService.initialize()
    ↓
Check standalone mode (isInstalled)
    ↓
Add beforeinstallprompt listener
    ↓
Browser fires event (when PWA criteria met)
    ↓
Save event to InstallPromptStore, set isInstallable=true
    ↓
EngagementTracker checks session count
    ↓
InstallPromptButton appears (isInstallable && !isInstalled && sessions>0)
    ↓
User clicks button → promptInstall() calls event.prompt()
    ↓
User accepts → isInstalled=true, prompt hidden

Browser Support Matrix:

Chrome/Edge (Desktop/Android): Full support (beforeinstallprompt + custom UI)
Firefox (Desktop): Full support
Safari (Desktop/iOS): No beforeinstallprompt → Show manual instructions

MVP Scope:

Basic install prompt with engagement detection
Icon assets (192x192, 512x512)
Standalone mode detection
iOS fallback instructions

Post-MVP Enhancements:

Maskable icons for Android adaptive shape
Custom install splash screen
Install prompt A/B testing (timing, messaging)
In-app ratings prompt after install
Deferred install timing (after N sessions)

Implementation Summary: All automated tests pass (77 tests):

src/app/manifest.test.ts: 11 tests passed
src/lib/store/install-prompt-store.test.ts: 21 tests passed
src/services/install-prompt-service.test.ts: 19 tests passed
src/services/engagement-tracker.test.ts: 17 tests passed
src/components/features/pwa/InstallPromptButton.test.tsx: 9 tests passed

Manual browser tests remain to be done during QA phase.

File List

New Files Created:

src/app/manifest.ts - PWA manifest configuration
src/app/manifest.test.ts - Manifest tests
src/lib/store/install-prompt-store.ts - Install prompt state management (Zustand)
src/lib/store/install-prompt-store.test.ts - Store tests
src/services/install-prompt-service.ts - Install prompt service layer
src/services/install-prompt-service.test.ts - Service tests
src/services/engagement-tracker.ts - Engagement detection service
src/services/engagement-tracker.test.ts - Engagement tests
src/components/features/pwa/InstallPromptButton.tsx - Install button component
src/components/features/pwa/InstallPromptButton.test.tsx - Button tests
src/components/features/pwa/index.ts - Feature exports
public/icons/icon-192x192.png - 192x192 PWA icon
public/icons/icon-512x512.png - 512x512 PWA icon

Modified Files:

src/app/layout.tsx - Added PWA metadata, InstallPromptService initialization, InstallPromptButton rendering

Change Log

Date: 2026-01-23

Implemented PWA Install Prompt & Manifest (Story 3.4)

Created Next.js 16 compatible manifest.ts with proper PWA configuration
Created InstallPromptStore for state management using Zustand with atomic selectors
Created InstallPromptService following Logic Sandwich pattern for event handling
Created EngagementTracker using completed drafts as engagement metric
Created InstallPromptButton component with non-intrusive fixed bottom-right positioning
Updated layout.tsx with PWA metadata and service initialization
Added placeholder icon assets (192x192, 512x512)
All 77 automated tests passing

Code Review Update (Senior Dev AI) - 2026-01-23

Fixed: Broke Server-Side Rendering in layout.tsx by moving service initialization to PWAInitializer.tsx client component.
Fixed: Added missing experimental optimizePackageImports to next.config.ts.
Refactored: Updated InstallPromptButton.tsx to use InstallPromptService.promptInstall() directly, adhering strictly to the Logic Sandwich pattern.
Verified: All architectural patterns now fully compliant.

Code Review Update (Senior Dev AI) - 2026-01-24

Fixed: Test mock in InstallPromptButton.test.tsx was missing promptInstall method, causing test failure.
Fixed: Removed duplicate "Atomic selectors for performance" comment in InstallPromptButton.tsx.
Fixed: Replaced placeholder 1-bit colormap icons with real Morning Mist themed PWA icons (192x192: ~37KB, 512x512: ~337KB).
Fixed: PWAInitializer.test.tsx was using Jest syntax (jest.mock) instead of Vitest syntax (vi.mock), causing test suite to fail.
Synced: Updated sprint-status.yaml to match story status (done).
Verified: All 78 PWA-related tests now passing (10 in pwa/, 22 in store, 19 in service, 17 in engagement, 11 in manifest).

Architecture Compliance:

Logic Sandwich Pattern: UI -> Store -> Service (no direct event handling in components)
Atomic Selectors: All Zustand stores use individual property selectors
Local-First: Engagement data stored in IndexedDB (drafts table)

Implementation Plan

Phase 1: Foundation (Completed)

Created PWA manifest configuration (src/app/manifest.ts)
Created placeholder icon assets
Updated layout metadata for PWA support

Phase 2: State & Service Layer (Completed)

Created InstallPromptStore with atomic selectors
Created InstallPromptService for beforeinstallprompt event handling
Created EngagementTracker for engagement detection

Phase 3: UI Components (Completed)

Created InstallPromptButton with conditional rendering
Integrated button into app layout

Phase 4: Testing (Completed - Automated)

Unit tests for store, service, engagement tracker
Component tests for InstallPromptButton
All 77 tests passing

Phase 5: Manual Testing (Pending)

Chrome Desktop install flow
Chrome Android install flow
Standalone mode verification
iOS fallback behavior
Lighthouse PWA audit

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