支持App Run并行开发并修复资源画布

新增App Run独立开发profile并隔离端口、数据库、Tauri身份与AppData
常驻资源排列切换并避免布局状态挤压操作入口
显式扩展资源画布横向滚动范围并收敛依赖图可见连线
补充启动器、资源布局、界面回归测试与项目文档

package.json

@@ -129,6 +129,7 @@
     "desktop-shell:typecheck": "npm --prefix apps/desktop-shell run typecheck",
     "desktop-shell:test": "cargo test --manifest-path apps/desktop-shell/src-tauri/Cargo.toml",
     "agc": "npm --prefix apps/ai-game-creator-shell run dev",
+    "agc:app-run": "npm --prefix apps/ai-game-creator-shell run dev:app-run",
     "agc:dev": "npm --prefix apps/ai-game-creator-shell run dev",
     "agc:game-chat": "npm --prefix apps/ai-game-creator-shell run game-chat --",
     "agc:serve": "npm run agc:typecheck && npm --prefix apps/ai-game-creator-shell run dev-stack",