fix: generate new user hash only on load

src/main.py

@@ -31,16 +31,16 @@ async def return_to_constructor(user_hash: str):
 
     await reset_user_state(user_hash)
     await cleanup_music_session(user_hash)
-    # Generate a new hash to avoid stale state
-    new_hash = str(uuid.uuid4())
     return (
         gr.update(visible=False),  # loading_indicator
         gr.update(visible=True),  # constructor_interface
         gr.update(visible=False),  # game_interface
         gr.update(visible=False),  # error_message
-        gr.update(value=new_hash),  # local_storage
     )
 
+async def generate_user_hash():
+    new_hash = str(uuid.uuid4())
+    return gr.update(value=new_hash)
 
 async def update_scene(user_hash: str, choice):
     logger.info(f"Updating scene with choice: {choice}")
@@ -138,7 +138,7 @@ with gr.Blocks(
     with gr.Column(visible=False, elem_id="loading-indicator") as loading_indicator:
         gr.HTML("<div class='loading-text'>🚀 Starting your adventure...</div>")
 
-    local_storage = gr.BrowserState(str(uuid.uuid4()), "user_hash")
+    local_storage = gr.BrowserState("", "user_hash")
 
     # Constructor Interface (visible by default)
     with gr.Column(
@@ -343,7 +343,6 @@ with gr.Blocks(
             constructor_interface,
             game_interface,
             error_message,
-            local_storage,
         ],
     )
 
@@ -359,6 +358,8 @@ with gr.Blocks(
         outputs=[game_text, game_image, game_choices, custom_choice],
     )
 
+    demo.load(fn=generate_user_hash, outputs=[local_storage])
+
     demo.unload(cleanup_music_session)
     demo.load(
         fn=update_audio,