fix gradio version 5.33 for compatibility

app.py

@@ -623,7 +623,7 @@ with gr.Blocks(css=css_code, title="VoiceBook Gradio Hub") as demo:
     # 2. Book card click → load into player
     def handle_book_select(title_chosen, current_inventory):
         if not title_chosen:
-            return [gr.update()] * 12
+            return [gr.update()] * 11
         selected = next((b for b in current_inventory if b["title"] == title_chosen), current_inventory[0])
 
         player_html = f"""

requirements.txt

@@ -1,4 +1,4 @@
-gradio>=5.0
+gradio==5.33.0
 transformers
 torch
 accelerate