Serve frontend HTML at root path

app.py

@@ -113,6 +113,15 @@ except Exception as e:
 for d in ["/data/frames", "/data/features", "/data/index", "/data/videos"]:
     os.makedirs(d, exist_ok=True)
 
+# Serve static frontend
+from fastapi.responses import HTMLResponse, FileResponse
+from fastapi.staticfiles import StaticFiles
+
+@app.get("/")
+async def serve_frontend():
+    """Serve the Eye-Dentify UI"""
+    return FileResponse("index.html")
+
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     async with engine.begin() as conn: