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

AGENTS.md

@@ -16,6 +16,7 @@ This repository is divided into distinct domains, each with its own `AGENTS.md`
 *   **Purpose**: Deploying applications and services to the cluster.
 *   **Method**: GitOps-style directory structure (Namespace = Folder).
 *   **Constraints**: Enforces `ingress-nginx`, `cert-manager` (Let's Encrypt), and `git-crypt` for secrets.
+*   **OpenClaw**: For OpenClaw AI agent deployment and troubleshooting, see [k8s/openclaw/AGENTS.md](./k8s/openclaw/AGENTS.md) and [k8s/openclaw/TROUBLESHOOTING.md](./k8s/openclaw/TROUBLESHOOTING.md).
 *   **Read**: [k8s/AGENTS.md](./k8s/AGENTS.md)
 
 ### 3. Terraform (`terraform/`)