Fix app startup for HF Spaces

Call demo.launch() unconditionally instead of only when __main__.
HF Spaces imports the module rather than running it directly.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app.py

@@ -22,6 +22,4 @@ def create_demo():
     return demo
 
 demo = create_demo()
-
-if __name__ == "__main__":
-    demo.launch()
+demo.launch()