Update app.py

app.py

@@ -55,6 +55,17 @@ class ConnectionManager:
 
 manager = ConnectionManager()
 
+
+@app.get("/", response_class=HTMLResponse)
+async def root():
+    """Serve the main HTML page."""
+    try:
+        with open("static/index.html", "r", encoding="utf-8") as f:
+            return HTMLResponse(content=f.read())
+    except FileNotFoundError:
+        raise HTTPException(status_code=404, detail="index.html not found")
+
+
 @app.post("/v1/mock")
 async def mock_endpoint(request: Request):
     """