feat(m5): PWA service worker, offline Dexie store, outbox, sync endpoints

web/vite.config.ts

@@ -1,8 +1,45 @@
 import { sveltekit } from '@sveltejs/kit/vite';
 import { defineConfig } from 'vite';
+import { VitePWA } from 'vite-plugin-pwa';
 
 export default defineConfig({
-	plugins: [sveltekit()],
+	plugins: [
+		sveltekit(),
+		VitePWA({
+			registerType: 'autoUpdate',
+			strategies: 'generateSW',
+			injectRegister: 'auto',
+			workbox: {
+				globPatterns: ['**/*.{js,css,html,svg,png,ico,woff,woff2}'],
+				navigateFallback: 'index.html',
+				navigateFallbackDenylist: [/^\/api/, /^\/healthz/],
+				runtimeCaching: [
+					{
+						urlPattern: /^\/api\//,
+						handler: 'NetworkFirst',
+						options: {
+							cacheName: 'api-cache',
+							networkTimeoutSeconds: 5,
+							cacheableResponse: { statuses: [0, 200] }
+						}
+					}
+				]
+			},
+			manifest: {
+				name: 'Wotra — Working Time Tracker',
+				short_name: 'Wotra',
+				description: 'Track your working hours, close days and weeks, compute overtime.',
+				theme_color: '#1a1a2e',
+				background_color: '#f8f9fa',
+				display: 'standalone',
+				start_url: '/',
+				icons: [
+					{ src: '/icon-192.png', sizes: '192x192', type: 'image/png' },
+					{ src: '/icon-512.png', sizes: '512x512', type: 'image/png' }
+				]
+			}
+		})
+	],
 	server: {
 		proxy: {
 			'/api': 'http://localhost:8080',