feat(sasch40): improve Act III, add state persistence and fix portraits

- Fix character portrait crops and version assets to portrait_v2, ensuring correct identities (resolving Nat/Verena mismatch)
- Update Schankraum scene image and configure Nginx cache-control to prevent stale asset caching
- Make secret beer tap completely invisible in tavern until clicked
- Reposition room hotspots in Act III to eliminate overlapping click targets
- Add exit button [✕] to Bavarian Gstanzl duel minigame
- Implement localStorage persistence in gameStore to maintain progress across page reloads
- Enable clean game state and storage reset when clicking "Nochmal spielen"
- Expand automated playtest script to cover Nat dialogue, duel exit, reload persistence, and game restart

projects/sasch40/frontend/src/main.ts

@@ -4,5 +4,13 @@ import './style.css'
 import App from './App.vue'
 
 const app = createApp(App)
-app.use(createPinia())
+const pinia = createPinia()
+app.use(pinia)
+
+import { useGameStore, saveStateToStorage } from './stores/gameStore'
+const store = useGameStore()
+store.$subscribe((_mutation, state) => {
+  saveStateToStorage(state)
+})
+
 app.mount('#app')