Fix: Fix syntax error in exception handling

app.py

@@ -1054,25 +1054,38 @@ def _create_demo():
 
 # Create demo at module level (like HF docs example)
 # This ensures Spaces can always find it when importing the module
-# CRITICAL: Create demo directly, not through function, to ensure it's at module scope
-try:
-    if IS_SPACES:
-        logger.info("Creating demo for Spaces...")
-    else:
-        logger.info("Creating demo for local execution...")
-    
-    # Call the function to create demo
-    demo = _create_demo()
-    
-    # CRITICAL: Ensure demo is definitely set at module level
-    # Re-assign to make absolutely sure it's accessible
-    if demo is not None and isinstance(demo, (gr.Blocks, gr.Interface)):
-        logger.info("Demo creation completed successfully")
-    else:
-        raise ValueError(f"Demo creation returned invalid result: {type(demo)}")
-        
-except Exception as e:
-    logger.error(f"CRITICAL: Error in demo creation wrapper: {e}", exc_info=True)
+# CRITICAL: For Spaces, create demo directly at module level (not through function)
+# This ensures it's definitely accessible when Spaces imports the module
+if IS_SPACES:
+    logger.info("Creating demo directly at module level for Spaces...")
+    try:
+        demo = _create_demo()
+        if demo is None or not isinstance(demo, (gr.Blocks, gr.Interface)):
+            raise ValueError(f"Demo creation failed: {type(demo)}")
+        logger.info("Demo created successfully for Spaces")
+    except Exception as e:
+        logger.error(f"Error creating demo for Spaces: {e}", exc_info=True)
+        import traceback
+        error_trace = traceback.format_exc()
+        # Create fallback demo
+        with gr.Blocks(title="CGT-LLM-Beta RAG Chatbot") as demo:
+            gr.Markdown(f"""
+            # Error Creating Demo
+            
+            **Error:** {str(e)}
+            
+            **Traceback:**
+            ```
+            {error_trace[:1500]}...
+            ```
+            """)
+else:
+    # For local execution, use function
+    try:
+        demo = _create_demo()
+        logger.info("Demo creation completed")
+    except Exception as e:
+        logger.error(f"CRITICAL: Error in demo creation wrapper: {e}", exc_info=True)
     import traceback
     error_trace = traceback.format_exc()
     logger.error(f"Full traceback: {error_trace}")