Claude Code: fix: add error handling to increment_message_count

app.py

@@ -332,9 +332,13 @@ def get_session_info() -> tuple[str, str]:
 
 def increment_message_count() -> int:
     """Increment and return the message count."""
-    global _message_count
-    _message_count += 1
-    return _message_count
+    try:
+        global _message_count
+        _message_count += 1
+        return _message_count
+    except Exception as e:
+        logger.error(f"[INCREMENT_ERROR] Failed to increment message count: {e}")
+        return 0
 
 
 def reset_session():