feat(iframe): add iframe bridge for ragflow integration

- Implement Penpal-based iframe communication bridge between host and child apps
- Add route handling for ragflow integration with '/route-ragflow' prefix
- Update navigation hooks to support embedded mode via iframe bridge
- Configure build and dependencies for new iframe-bridge package
- Adjust nginx config for proper SPA routing in subpath deployments

packages/iframe-bridge/package.json

@@ -7,6 +7,9 @@
   "main": "dist/index.js",
   "module": "dist/index.js",
   "types": "dist/index.d.ts",
+  "scripts": {
+    "build": "tsc -b"
+  },
   "exports": {
     ".": {
       "types": "./dist/index.d.ts",
@@ -29,5 +32,8 @@
     "penpal": {
       "optional": true
     }
+  },
+  "devDependencies": {
+    "typescript": "~5.9.3"
   }
 }