Cleanup: remove unused files, add index route, KISS

server.py

@@ -199,6 +199,11 @@ def categories(bid: str):
         cats = [r["category"] for r in rows]
         return {"categories": cats}
 
+# Serve frontend
+@app.get("/")
+def index():
+    return FileResponse("index.html")
+
 # WebSocket broadcast
 clients = set()