feat: Add PWA support

- PWA_MOBILE_SPEC.md documentation
- manifest.json with app metadata
- Service Worker with caching strategies
- Offline page
- PWA registration in layout
- App icons (placeholder)

apps/web/public/icons/generate-icons.js

@@ -0,0 +1,61 @@
+const fs = require('fs');
+const { createCanvas } = require('canvas');
+
+function generateIcon(size, filename) {
+  const canvas = createCanvas(size, size);
+  const ctx = canvas.getContext('2d');
+  
+  // Background
+  ctx.fillStyle = '#0f172a';
+  ctx.beginPath();
+  ctx.roundRect(0, 0, size, size, size * 0.18);
+  ctx.fill();
+  
+  // Gradient for sparkle
+  const gradient = ctx.createLinearGradient(0, 0, size, size);
+  gradient.addColorStop(0, '#22d3ee');
+  gradient.addColorStop(1, '#3b82f6');
+  
+  // Draw sparkle
+  const cx = size / 2;
+  const cy = size / 2;
+  const s = size * 0.23; // sparkle size
+  
+  ctx.fillStyle = gradient;
+  ctx.beginPath();
+  ctx.moveTo(cx, cy - s);
+  ctx.lineTo(cx + s * 0.12, cy - s * 0.12);
+  ctx.lineTo(cx + s, cy);
+  ctx.lineTo(cx + s * 0.12, cy + s * 0.12);
+  ctx.lineTo(cx, cy + s);
+  ctx.lineTo(cx - s * 0.12, cy + s * 0.12);
+  ctx.lineTo(cx - s, cy);
+  ctx.lineTo(cx - s * 0.12, cy - s * 0.12);
+  ctx.closePath();
+  ctx.fill();
+  
+  // Small sparkles
+  ctx.fillStyle = '#22d3ee';
+  ctx.globalAlpha = 0.7;
+  ctx.beginPath();
+  ctx.arc(cx + size * 0.15, cy - size * 0.15, size * 0.023, 0, Math.PI * 2);
+  ctx.fill();
+  
+  ctx.fillStyle = '#3b82f6';
+  ctx.globalAlpha = 0.6;
+  ctx.beginPath();
+  ctx.arc(cx - size * 0.14, cy + size * 0.14, size * 0.015, 0, Math.PI * 2);
+  ctx.fill();
+  
+  const buffer = canvas.toBuffer('image/png');
+  fs.writeFileSync(filename, buffer);
+  console.log(`Generated ${filename}`);
+}
+
+try {
+  generateIcon(192, 'icon-192x192.png');
+  generateIcon(512, 'icon-512x512.png');
+  generateIcon(180, 'apple-touch-icon.png');
+} catch (e) {
+  console.error('Error:', e.message);
+}

apps/web/public/icons/icon.svg

@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" fill="none">
+  <rect width="512" height="512" rx="96" fill="#0f172a"/>
+  <defs>
+    <linearGradient id="sparkle" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#22d3ee"/>
+      <stop offset="100%" style="stop-color:#3b82f6"/>
+    </linearGradient>
+  </defs>
+  <g transform="translate(256, 256)">
+    <path d="M0 -120 L15 -15 L120 0 L15 15 L0 120 L-15 15 L-120 0 L-15 -15 Z" fill="url(#sparkle)" opacity="0.9"/>
+    <circle cx="80" cy="-80" r="12" fill="#22d3ee" opacity="0.7"/>
+    <circle cx="-70" cy="70" r="8" fill="#3b82f6" opacity="0.6"/>
+    <circle cx="60" cy="90" r="6" fill="#22d3ee" opacity="0.5"/>
+    <circle cx="-90" cy="-50" r="10" fill="#3b82f6" opacity="0.6"/>
+  </g>
+</svg>

apps/web/public/manifest.json

@@ -0,0 +1,28 @@
+{
+  "name": "DAARION.city",
+  "short_name": "DAARION",
+  "description": "Децентралізована платформа для мікро-спільнот з AI-агентами",
+  "start_url": "/",
+  "scope": "/",
+  "display": "standalone",
+  "orientation": "portrait-primary",
+  "theme_color": "#0c4a6e",
+  "background_color": "#0f172a",
+  "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"
+    }
+  ],
+  "categories": ["social", "productivity"],
+  "lang": "uk"
+}
+

apps/web/public/sw.js

@@ -0,0 +1,135 @@
+// DAARION Service Worker v1.0
+const CACHE_VERSION = 'v1';
+const STATIC_CACHE = `daarion-static-${CACHE_VERSION}`;
+const PAGES_CACHE = `daarion-pages-${CACHE_VERSION}`;
+
+// Files to precache
+const PRECACHE_URLS = [
+  '/',
+  '/city',
+  '/offline',
+  '/manifest.json',
+  '/icons/icon-192x192.png',
+  '/icons/icon-512x512.png'
+];
+
+// Install event - precache static assets
+self.addEventListener('install', (event) => {
+  console.log('[SW] Installing...');
+  event.waitUntil(
+    caches.open(STATIC_CACHE)
+      .then((cache) => {
+        console.log('[SW] Precaching app shell');
+        return cache.addAll(PRECACHE_URLS);
+      })
+      .then(() => self.skipWaiting())
+  );
+});
+
+// Activate event - clean old caches
+self.addEventListener('activate', (event) => {
+  console.log('[SW] Activating...');
+  event.waitUntil(
+    caches.keys().then((cacheNames) => {
+      return Promise.all(
+        cacheNames
+          .filter((name) => name.startsWith('daarion-') && name !== STATIC_CACHE && name !== PAGES_CACHE)
+          .map((name) => {
+            console.log('[SW] Deleting old cache:', name);
+            return caches.delete(name);
+          })
+      );
+    }).then(() => self.clients.claim())
+  );
+});
+
+// Fetch event - handle requests
+self.addEventListener('fetch', (event) => {
+  const { request } = event;
+  const url = new URL(request.url);
+  
+  // Skip non-GET requests
+  if (request.method !== 'GET') return;
+  
+  // Skip API and WebSocket requests
+  if (url.pathname.startsWith('/api/') || 
+      url.pathname.startsWith('/ws/') ||
+      url.pathname.startsWith('/_matrix/')) {
+    return;
+  }
+  
+  // Static assets - Cache First
+  if (url.pathname.startsWith('/_next/static/') || 
+      url.pathname.match(/\.(js|css|png|jpg|jpeg|gif|svg|woff|woff2)$/)) {
+    event.respondWith(cacheFirst(request, STATIC_CACHE));
+    return;
+  }
+  
+  // HTML pages - Network First with fallback
+  if (request.headers.get('accept')?.includes('text/html')) {
+    event.respondWith(networkFirstWithFallback(request, PAGES_CACHE));
+    return;
+  }
+  
+  // Default - try network
+  event.respondWith(fetch(request));
+});
+
+// Cache First strategy
+async function cacheFirst(request, cacheName) {
+  const cachedResponse = await caches.match(request);
+  if (cachedResponse) {
+    // Update cache in background
+    fetch(request).then((response) => {
+      if (response.ok) {
+        caches.open(cacheName).then((cache) => cache.put(request, response));
+      }
+    }).catch(() => {});
+    return cachedResponse;
+  }
+  
+  try {
+    const response = await fetch(request);
+    if (response.ok) {
+      const cache = await caches.open(cacheName);
+      cache.put(request, response.clone());
+    }
+    return response;
+  } catch (error) {
+    console.log('[SW] Cache first failed:', request.url);
+    throw error;
+  }
+}
+
+// Network First with fallback strategy
+async function networkFirstWithFallback(request, cacheName) {
+  try {
+    const response = await fetch(request);
+    if (response.ok) {
+      const cache = await caches.open(cacheName);
+      cache.put(request, response.clone());
+    }
+    return response;
+  } catch (error) {
+    console.log('[SW] Network failed, trying cache:', request.url);
+    const cachedResponse = await caches.match(request);
+    if (cachedResponse) {
+      return cachedResponse;
+    }
+    
+    // Return offline page for navigation requests
+    const offlineResponse = await caches.match('/offline');
+    if (offlineResponse) {
+      return offlineResponse;
+    }
+    
+    // Return a basic offline response
+    return new Response(
+      '<html><body><h1>Ви офлайн</h1><p>Перевірте підключення до інтернету</p></body></html>',
+      { 
+        status: 503,
+        headers: { 'Content-Type': 'text/html; charset=utf-8' }
+      }
+    );
+  }
+}

apps/web/src/app/layout.tsx

@@ -3,6 +3,7 @@ import { Inter } from 'next/font/google'
 import './globals.css'
 import { Navigation } from '@/components/Navigation'
 import { AuthProvider } from '@/context/AuthContext'
+import { PWAProvider } from '@/components/PWAProvider'
 
 const inter = Inter({ 
   subsets: ['latin', 'cyrillic'],
@@ -15,6 +16,16 @@ export const metadata: Metadata = {
   description: 'Децентралізована платформа для мікро-спільнот з AI-агентами',
   keywords: ['DAARION', 'DAO', 'AI', 'agents', 'community', 'decentralized'],
   authors: [{ name: 'DAARION Team' }],
+  manifest: '/manifest.json',
+  appleWebApp: {
+    capable: true,
+    statusBarStyle: 'black-translucent',
+    title: 'DAARION',
+  },
+  icons: {
+    icon: '/icons/icon-192x192.png',
+    apple: '/icons/apple-touch-icon.png',
+  },
 }
 
 export const viewport: Viewport = {
@@ -33,6 +44,7 @@ export default function RootLayout({
     <html lang="uk" className={inter.variable}>
       <body className={`${inter.className} antialiased`}>
         <AuthProvider>
+          <PWAProvider>
             {/* Ambient background effect */}
             <div className="ambient-bg" />
             
@@ -43,6 +55,7 @@ export default function RootLayout({
             <main className="min-h-screen pt-16">
               {children}
             </main>
+          </PWAProvider>
         </AuthProvider>
       </body>
     </html>

apps/web/src/app/offline/page.tsx

@@ -0,0 +1,53 @@
+'use client'
+
+import { WifiOff, RefreshCw, Sparkles } from 'lucide-react'
+
+export default function OfflinePage() {
+  const handleRetry = () => {
+    window.location.reload()
+  }
+
+  return (
+    <div className="min-h-screen flex items-center justify-center px-4">
+      <div className="text-center max-w-md">
+        {/* Logo */}
+        <div className="flex justify-center mb-6">
+          <div className="w-20 h-20 rounded-2xl bg-slate-800/50 flex items-center justify-center">
+            <Sparkles className="w-10 h-10 text-cyan-400" />
+          </div>
+        </div>
+
+        {/* Offline Icon */}
+        <div className="flex justify-center mb-6">
+          <div className="w-16 h-16 rounded-full bg-amber-500/20 flex items-center justify-center">
+            <WifiOff className="w-8 h-8 text-amber-400" />
+          </div>
+        </div>
+
+        {/* Message */}
+        <h1 className="text-2xl font-bold text-white mb-3">
+          Ви офлайн
+        </h1>
+        <p className="text-slate-400 mb-8">
+          Перевірте підключення до інтернету та спробуйте ще раз.
+          Деякі раніше відвідані сторінки можуть бути доступні з кешу.
+        </p>
+
+        {/* Retry Button */}
+        <button
+          onClick={handleRetry}
+          className="inline-flex items-center gap-2 px-6 py-3 bg-gradient-to-r from-cyan-500 to-blue-600 text-white font-medium rounded-xl hover:from-cyan-400 hover:to-blue-500 transition-all shadow-lg shadow-cyan-500/20"
+        >
+          <RefreshCw className="w-5 h-5" />
+          Спробувати знову
+        </button>
+
+        {/* Info */}
+        <p className="mt-8 text-sm text-slate-500">
+          DAARION.city працює краще з інтернет-з&apos;єднанням
+        </p>
+      </div>
+    </div>
+  )
+}
+

apps/web/src/components/PWAProvider.tsx

@@ -0,0 +1,13 @@
+'use client'
+
+import { useEffect } from 'react'
+import { registerServiceWorker } from '@/lib/pwa'
+
+export function PWAProvider({ children }: { children: React.ReactNode }) {
+  useEffect(() => {
+    registerServiceWorker()
+  }, [])
+
+  return <>{children}</>
+}
+

apps/web/src/lib/pwa.ts

@@ -0,0 +1,83 @@
+/**
+ * PWA utilities for DAARION
+ */
+
+export function registerServiceWorker(): void {
+  if (typeof window === 'undefined') return;
+  if (!('serviceWorker' in navigator)) {
+    console.log('[PWA] Service Worker not supported');
+    return;
+  }
+  
+  // Only register in production
+  if (process.env.NODE_ENV !== 'production') {
+    console.log('[PWA] Skipping SW registration in development');
+    return;
+  }
+  
+  window.addEventListener('load', async () => {
+    try {
+      const registration = await navigator.serviceWorker.register('/sw.js', {
+        scope: '/'
+      });
+      
+      console.log('[PWA] Service Worker registered:', registration.scope);
+      
+      // Check for updates
+      registration.addEventListener('updatefound', () => {
+        const newWorker = registration.installing;
+        if (newWorker) {
+          newWorker.addEventListener('statechange', () => {
+            if (newWorker.state === 'installed' && navigator.serviceWorker.controller) {
+              // New content available
+              console.log('[PWA] New content available, refresh to update');
+              // Could show a toast notification here
+            }
+          });
+        }
+      });
+    } catch (error) {
+      console.error('[PWA] Service Worker registration failed:', error);
+    }
+  });
+}
+
+export function unregisterServiceWorker(): void {
+  if (typeof window === 'undefined') return;
+  if (!('serviceWorker' in navigator)) return;
+  
+  navigator.serviceWorker.ready.then((registration) => {
+    registration.unregister().then((success) => {
+      if (success) {
+        console.log('[PWA] Service Worker unregistered');
+      }
+    });
+  });
+}
+
+/**
+ * Check if app is running in standalone mode (installed PWA)
+ */
+export function isStandalone(): boolean {
+  if (typeof window === 'undefined') return false;
+  
+  return (
+    window.matchMedia('(display-mode: standalone)').matches ||
+    (window.navigator as any).standalone === true
+  );
+}
+
+/**
+ * Check if app can be installed
+ */
+export function canInstall(): boolean {
+  if (typeof window === 'undefined') return false;
+  
+  // Check if already installed
+  if (isStandalone()) return false;
+  
+  // Check for beforeinstallprompt support
+  return 'BeforeInstallPromptEvent' in window || 
+         'onbeforeinstallprompt' in window;
+}
+

docs/web/PWA_MOBILE_SPEC.md

@@ -0,0 +1,243 @@
+# PWA / Mobile Specification — DAARION.city
+
+Version: 1.0.0
+
+## 0. PURPOSE
+
+Зробити `app.daarion.space` Progressive Web App (PWA):
+- **Installable** — можна додати на домашній екран як додаток
+- **Offline shell** — базові сторінки працюють без мережі
+- **Mobile-first** — оптимізовано для мобільних пристроїв
+- **Foundation for push** — підготовка до push-нотифікацій
+
+---
+
+## 1. GOALS
+
+### 1.1. Installable
+- Користувач може "Add to Home Screen" на iOS/Android/Desktop
+- Відкривається в standalone режимі (без browser UI)
+- Власна іконка та splash screen
+
+### 1.2. Offline Shell
+- Головна сторінка `/` працює з кешу
+- Список кімнат `/city` працює з кешу
+- Сторінки кімнат `/city/[slug]` — кешований shell + повідомлення "ви офлайн"
+- Matrix чат — показує offline-стан, не намагається емулювати
+
+### 1.3. Performance
+- Швидке завантаження через кешування статичних ресурсів
+- App shell architecture
+
+---
+
+## 2. MANIFEST.JSON
+
+Файл: `public/manifest.json`
+
+```json
+{
+  "name": "DAARION.city",
+  "short_name": "DAARION",
+  "description": "Децентралізована платформа для мікро-спільнот з AI-агентами",
+  "start_url": "/",
+  "scope": "/",
+  "display": "standalone",
+  "orientation": "portrait-primary",
+  "theme_color": "#0c4a6e",
+  "background_color": "#0f172a",
+  "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"
+    }
+  ],
+  "categories": ["social", "productivity"],
+  "lang": "uk"
+}
+```
+
+---
+
+## 3. ICONS
+
+Директорія: `public/icons/`
+
+| File | Size | Purpose |
+|------|------|---------|
+| `icon-192x192.png` | 192×192 | Android, Chrome |
+| `icon-512x512.png` | 512×512 | Splash screen |
+| `apple-touch-icon.png` | 180×180 | iOS |
+| `favicon.ico` | 32×32 | Browser tab |
+
+Дизайн: DAARION логотип (sparkles/зірка) на темному фоні (#0f172a)
+
+---
+
+## 4. SERVICE WORKER
+
+Файл: `public/sw.js`
+
+### 4.1. Cache Strategy
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                    REQUEST FLOW                              │
+├─────────────────────────────────────────────────────────────┤
+│                                                             │
+│  Static Assets (/_next/static/*, fonts, images)             │
+│  └── Cache First → Return cached → Update in background     │
+│                                                             │
+│  HTML Pages (/, /city, /city/*)                             │
+│  └── Network First → Fallback to cache → Offline page       │
+│                                                             │
+│  API Requests (/api/*)                                      │
+│  └── Network Only → No caching                              │
+│                                                             │
+│  Matrix/WebSocket                                           │
+│  └── Network Only → Show offline state in UI                │
+│                                                             │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### 4.2. Cache Names
+
+```javascript
+const CACHE_NAME = 'daarion-v1';
+const STATIC_CACHE = 'daarion-static-v1';
+const PAGES_CACHE = 'daarion-pages-v1';
+```
+
+### 4.3. Precache List
+
+```javascript
+const PRECACHE_URLS = [
+  '/',
+  '/city',
+  '/offline',
+  '/manifest.json',
+  '/icons/icon-192x192.png',
+  '/icons/icon-512x512.png'
+];
+```
+
+---
+
+## 5. OFFLINE PAGE
+
+Файл: `src/app/offline/page.tsx`
+
+Простий екран:
+- DAARION логотип
+- "Ви офлайн"
+- "Перевірте підключення до інтернету"
+- Кнопка "Спробувати знову"
+
+---
+
+## 6. HEAD METADATA
+
+В `layout.tsx`:
+
+```tsx
+<head>
+  <link rel="manifest" href="/manifest.json" />
+  <meta name="theme-color" content="#0c4a6e" />
+  <link rel="apple-touch-icon" href="/icons/apple-touch-icon.png" />
+  <meta name="apple-mobile-web-app-capable" content="yes" />
+  <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
+  <meta name="apple-mobile-web-app-title" content="DAARION" />
+</head>
+```
+
+---
+
+## 7. SW REGISTRATION
+
+В `src/lib/pwa.ts`:
+
+```typescript
+export function registerServiceWorker() {
+  if (typeof window === 'undefined') return;
+  if (!('serviceWorker' in navigator)) return;
+  
+  // Only in production
+  if (process.env.NODE_ENV !== 'production') {
+    console.log('SW: Skipping registration in development');
+    return;
+  }
+  
+  window.addEventListener('load', async () => {
+    try {
+      const registration = await navigator.serviceWorker.register('/sw.js');
+      console.log('SW: Registered', registration.scope);
+    } catch (error) {
+      console.error('SW: Registration failed', error);
+    }
+  });
+}
+```
+
+---
+
+## 8. TESTING CHECKLIST
+
+### 8.1. DevTools → Application
+- [ ] Manifest loads correctly
+- [ ] Icons display properly
+- [ ] Service Worker is active
+- [ ] Cache Storage has expected caches
+
+### 8.2. Install Prompt
+- [ ] Chrome shows "Install app" option
+- [ ] Safari iOS shows "Add to Home Screen"
+- [ ] App opens in standalone mode
+
+### 8.3. Offline Mode
+- [ ] `/` loads from cache
+- [ ] `/city` loads from cache
+- [ ] `/city/general` shows chat offline state
+- [ ] API calls show appropriate error
+
+### 8.4. Lighthouse
+- [ ] PWA score > 90
+- [ ] Performance > 80
+- [ ] Accessibility > 90
+
+---
+
+## 9. LIMITATIONS (MVP)
+
+- ❌ No push notifications (future phase)
+- ❌ No background sync
+- ❌ No offline message queue
+- ❌ No IndexedDB for offline data
+
+---
+
+## 10. FUTURE ENHANCEMENTS
+
+1. **Push Notifications**
+   - Web Push API
+   - VAPID keys
+   - Notification preferences
+
+2. **Background Sync**
+   - Queue messages when offline
+   - Sync when back online
+
+3. **IndexedDB**
+   - Cache chat history
+   - Offline-first architecture
+
+4. **App Badges**
+   - Unread message count on icon
+