合并 GameAgent V1 UI 分支

引入游戏创作工作台与资源预览界面
同步 UI 原型生成和视觉验收约束

# Conflicts:
#	apps/ai-game-creator-shell/src/App.tsx
#	docs/README.md
#	docs/project-memory/shared-memory/decision-log.md
#	server-rs/crates/api-server/src/editor_project.rs

package.json

@@ -180,9 +180,11 @@
     "qrcode": "^1.5.4",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
+    "react-markdown": "^10.1.0",
     "react-native": "^0.86.0",
     "react-native-safe-area-context": "^5.8.0",
     "react-native-webview": "^13.16.1",
+    "remark-gfm": "^4.0.1",
     "three": "^0.184.0",
     "vite": "^6.2.0",
     "zustand": "^5.0.14"