🔧 Add short_name to PWA manifest

vite.config.js

@@ -13,7 +13,8 @@ export default defineConfig({
     VitePWA({
       registerType: "autoUpdate",
       manifest: {
-        name: "Timetable",
+        name: "Timetable V2",
+        short_name: "Timetable",
         description: "Timetable and Substitution plan viewer",
         theme_color: "#212121",
         background_color: "#353535",