Update requirements.txt

requirements.txt

@@ -1,6 +1,9 @@
-# ---- Core UI (pin to a known-good set with websockets>=12 support) ----
+# ---- Core UI ----
 gradio==4.44.0
 gradio_client==1.3.0
+
+# ---- WebSocket stack required by gradio_client ----
+# websockets.asyncio exists in websockets >= 12
 websockets==12.0
 
 # ---- Data & dates ----