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feat(RECIPE-0002): complete iteration 0 — generate PWA icons and update manifest

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Giancarmine Salucci
2026-02-16 12:19:49 +01:00
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---
**Document Version:** 1.0
**Generated by:** Initializer Agent
**Next Update:** Planner Agent
### [Planner] Research Notes - RECIPE-0002 (2026-02-16)
**Task:** Complete PWA implementation (installability, push notifications, share target)
#### PWA Documentation Research
**Research Date:** 2026-02-16
**Sources:** MDN Web Docs, web.dev, W3C specifications
**Progressive Web Apps (PWA) - Key Requirements:**
1. **Web App Manifest** (`manifest.json`)
- Required members: `name` or `short_name`, `icons` (192x192 PNG minimum), `start_url`, `display`
- Share target support via `share_target` member (method, action, params)
- Icons should include 192x192 and 512x512 sizes for optimal display
- Browser compatibility: Chrome/Edge (full), Firefox/Safari (limited for share_target)
2. **Service Worker**
- Must be registered to enable offline functionality
- Lifecycle: install → activate → fetch events
- Required for push notifications
- Must be served over HTTPS (or localhost)
3. **HTTPS Requirement**
- Mandatory for service worker registration
- Required for push notifications and other secure contexts
- Local development: `http://localhost` is treated as secure
4. **Installability Criteria** (from MDN/web.dev):
- Valid manifest with required members
- Service worker registered with fetch event handler
- Served over HTTPS
- At least one 192x192 PNG or SVG icon
- Display mode set (fullscreen, standalone, minimal-ui)
**Push Notifications (Web Push API):**
- Requires service worker to receive push events
- VAPID authentication (application server keys) required for Chrome
- Subscription process: permission → subscribe → store subscription → send push
- Push service (browser vendor controlled) routes messages
- Notification permissions: default, granted, denied
- Best practice: request permission after user interaction
**Web Share Target API:**
- Registers PWA as share destination
- Configuration via manifest `share_target` member
- Supports GET or POST methods
- `params` define query string mapping (title, text, url)
- Files can be shared via POST with `multipart/form-data`
- Currently Chrome/Edge only (experimental)
- App must be installed to appear in share sheet
#### Current Implementation Analysis
**Research Date:** 2026-02-16
**Files Analyzed:** manifest.json, service-worker.ts, app.html, svelte.config.js, PWAInstallManager.ts, PushNotificationManager.ts
**Manifest Analysis (`static/manifest.json`):**
- ✅ Has all required PWA members (name, short_name, start_url, display, scope, theme_color, background_color)
- ✅ Share target configured correctly (GET /share with title/text/url params)
- ⚠️ Icons reference `/favicon.png` but file does NOT exist in static folder
- ⚠️ Uses same icon path for both 192x192 and 512x512 sizes
- ℹ️ Missing optional but recommended members: `description`, `screenshots`, `categories`
**Service Worker Analysis (`src/service-worker.ts`):**
- ✅ Native SvelteKit service worker (migrated from vite-pwa plugin)
- ✅ Install event: caches all build assets and static files
- ✅ Activate event: cleans up old caches
- ✅ Fetch event: cache-first for assets, network-first with cache fallback for others
- ✅ Push event handler: processes push messages, shows notifications with actions
- ✅ Notification click handler: opens/focuses app, handles action buttons
- ✅ Notification close handler: tracks dismissals
- ✅ Background sync handler: supports retry operations
- ✅ Message handler: supports service worker communication
- ✅ Global error handlers present
**Service Worker Registration (`svelte.config.js`):**
- ✅ `serviceWorker.register: true` enabled
- ✅ SvelteKit handles registration automatically
**Manifest Link (`src/app.html`):**
- ✅ `<link rel="manifest" href="/manifest.json">` present in head
**Client-Side Managers:**
- ✅ `PushNotificationManager.ts`: Full implementation with permission, subscribe, unsubscribe
- ✅ `PWAInstallManager.ts`: beforeinstallprompt handling, install prompt triggering
- ✅ Both are SSR-safe with browser guards
**Share Target (`/share` route):**
- ✅ Route exists at `src/routes/share/+page.svelte`
- ✅ Parses query params (text, url) from share target
- ✅ Extracts Instagram URLs from shared text
- ✅ Auto-processes URLs on mount
- ✅ Enqueues items and redirects to dashboard
**Icons/Assets Issue:**
- ⚠️ **CRITICAL**: `manifest.json` references `/favicon.png` but file doesn't exist
- ✅ `src/lib/assets/favicon.svg` exists (used in layout)
- ⚠️ No PNG icons in `static/` folder
- ⚠️ Service worker references `/favicon.png` for notifications
**Push Notifications Infrastructure:**
- ✅ VAPID keys configured in `queueConfig.push` (uses env vars or defaults)
- ✅ Server endpoint: `/api/notifications/vapid-key` (GET)
- ✅ Server endpoint: `/api/notifications/subscribe` (POST/DELETE)
- ✅ PushNotificationService stores subscriptions in-memory
- ℹ️ Note: Subscriptions are not persisted (lost on restart)
#### What Works Already:
1. **PWA Structure**: Complete Native SvelteKit PWA implementation
2. **Service Worker**: Fully functional with caching, push, notifications
3. **Push Notifications**: Client and server infrastructure in place
4. **Share Target**: Configured in manifest and `/share` route working
5. **Install Prompts**: PWAInstallManager ready to trigger install
6. **HTTPS**: App served at https://localhost:5173/
#### What Needs Attention:
1. **Icons**: Create PNG icons (192x192, 512x512) from existing SVG
2. **Icon Verification**: Ensure icons are properly sized and optimized
3. **Installability Testing**: Verify all criteria met via chrome://pwa-internals
4. **Push Notification Testing**: Verify VAPID key generation and push flow
5. **Share Target Testing**: Test share from external apps (Instagram)
6. **Manifest Enhancement**: Add description, categories for better discoverability
#### Dependencies & Constraints (from ARCHITECTURE.md, CODE_STYLE.md):
- Using native SvelteKit PWA (no plugins needed)
- Service worker: `$service-worker` module provides build, files, version
- Environment: uses `$env/dynamic/private` for server configs
- HTTPS required (already configured at https://localhost:5173/)
- TypeScript strict mode enabled
- All file paths must use SvelteKit path aliases (`$lib`, `$service-worker`)
#### Code Style Requirements (from CODE_STYLE.md):
- FilesNaming: manifest.json, service-worker.ts, lowercase for utilities
- Type annotations required for public APIs
- SSR-safe code: all browser API usage must be guarded with `browser` check
- Error handling: try-catch with descriptive messages
- Comments: JSDoc for public APIs, inline for complex logic
---
**Document Version:** 1.1
**Last Updated by:** Planner Agent
**Next Update:** Developer Agent