Update app.py

app.py

@@ -12,6 +12,22 @@ Improvements:
 import gc
 import os
 import io
+
+# Workaround: Gradio 5.x bug where Queue.pending_message_lock stays None if the
+# ASGI lifespan startup events don't fire (a Python 3.13 asyncio compatibility issue).
+# Patch Queue.push to lazily initialize the lock before its first use.
+try:
+    import asyncio as _asyncio
+    from gradio.queueing import Queue as _GradioQueue
+    _orig_push = _GradioQueue.push
+    async def _patched_push(self, *args, **kwargs):
+        if getattr(self, "pending_message_lock", None) is None:
+            self.pending_message_lock = _asyncio.Lock()
+        return await _orig_push(self, *args, **kwargs)
+    _GradioQueue.push = _patched_push
+    print("✅ Applied Gradio queue lock workaround")
+except Exception as _patch_err:
+    print(f"ℹ️ Gradio queue patch skipped: {_patch_err}")
 import subprocess
 import json
 import re