fix: service worker registration

web/vite.config.ts

@@ -2,16 +2,28 @@ import { sveltekit } from '@sveltejs/kit/vite';
 import { defineConfig } from 'vitest/config';
 import { VitePWA } from 'vite-plugin-pwa';
 
+// A revision that changes on every build, so the SW always re-fetches index.html
+// when the app is redeployed. index.html is not picked up by globPatterns because
+// the static adapter creates it AFTER the service worker precache manifest is
+// generated — so we add it explicitly here instead.
+const buildId = Date.now().toString();
+
 export default defineConfig({
 	plugins: [
 		sveltekit(),
 		VitePWA({
 			registerType: 'autoUpdate',
 			strategies: 'generateSW',
-			injectRegister: 'auto',
+			injectRegister: false,
 			workbox: {
-				globPatterns: ['**/*.{js,css,html,svg,png,ico,woff,woff2}'],
-				navigateFallback: 'index.html',
+				globPatterns: ['**/*.{js,css,svg,png,ico,woff,woff2}'],
+				additionalManifestEntries: [
+					{ url: '/', revision: buildId },
+					{ url: '/index.html', revision: buildId }
+				],
+				cleanupOutdatedCaches: true,
+				clientsClaim: true,
+				navigateFallback: '/index.html',
 				navigateFallbackDenylist: [/^\/api/, /^\/healthz/],
 				runtimeCaching: [
 					{
@@ -25,6 +37,10 @@ export default defineConfig({
 					}
 				]
 			},
+			devOptions: {
+				enabled: true,
+				type: 'module'
+			},
 			manifest: {
 				name: 'Wotra — Working Time Tracker',
 				short_name: 'Wotra',