fix: add error handling to toggle_system_status

app.py

@@ -343,10 +343,14 @@ def reset_session():
 
 def toggle_system_status() -> tuple[bool, str]:
     """Toggle system status visibility."""
-    global _system_status_visible
-    _system_status_visible = not _system_status_visible
-    status_text = "✅ System details shown" if _system_status_visible else "🔒 System details hidden"
-    return _system_status_visible, status_text
+    try:
+        global _system_status_visible
+        _system_status_visible = not _system_status_visible
+        status_text = "✅ System details shown" if _system_status_visible else "🔒 System details hidden"
+        return _system_status_visible, status_text
+    except Exception as e:
+        logger.error(f"[TOGGLE_ERROR] Failed to toggle status: {e}")
+        return False, f"Error: {e}"
 
 
 def export_chat(history: list, format_type: str = "txt") -> str: