Simplify gr.Blocks for older Gradio compatibility

Remove theme and title params that aren't supported in older versions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/ui/app.py

@@ -192,19 +192,8 @@ class AudioCraftApp:
         """Build the Gradio application."""
         css = get_custom_css()
 
-        # Create Blocks with compatible parameters
+        # Create Blocks - use minimal params for compatibility
-        try:
+        with gr.Blocks(css=css) as app:
-            # Gradio 4.x
-            app = gr.Blocks(
-                theme=gr.themes.Soft(),
-                css=css,
-                title="AudioCraft Studio",
-            )
-        except TypeError:
-            # Fallback for older Gradio versions
-            app = gr.Blocks(css=css)
-
-        with app:
             # Header with VRAM monitor
             with gr.Row():
                 with gr.Column(scale=4):