Merge pull request #78 from google-gemini/fix-react-serving

update react serving part

backend/src/agent/app.py

@@ -1,8 +1,7 @@
 # mypy: disable - error - code = "no-untyped-def,misc"
 import pathlib
-from fastapi import FastAPI, Request, Response
+from fastapi import FastAPI, Response
 from fastapi.staticfiles import StaticFiles
-import fastapi.exceptions
 
 # Define the FastAPI app
 app = FastAPI()
@@ -18,7 +17,6 @@ def create_frontend_router(build_dir="../frontend/dist"):
         A Starlette application serving the frontend.
     """
     build_path = pathlib.Path(__file__).parent.parent.parent / build_dir
-    static_files_path = build_path / "assets"  # Vite uses 'assets' subdir
 
     if not build_path.is_dir() or not (build_path / "index.html").is_file():
         print(
@@ -36,21 +34,7 @@ def create_frontend_router(build_dir="../frontend/dist"):
 
         return Route("/{path:path}", endpoint=dummy_frontend)
 
-    build_dir = pathlib.Path(build_dir)
-
-    react = FastAPI(openapi_url="")
-    react.mount(
-        "/assets", StaticFiles(directory=static_files_path), name="static_assets"
-    )
-
-    @react.get("/{path:path}")
-    async def handle_catch_all(request: Request, path: str):
-        fp = build_path / path
-        if not fp.exists() or not fp.is_file():
-            fp = build_path / "index.html"
-        return fastapi.responses.FileResponse(fp)
-
-    return react
+    return StaticFiles(directory=build_path, html=True)
 
 
 # Mount the frontend under /app to not conflict with the LangGraph API routes