fix: Remove OAuth from demo.load to prevent auth loops

The visibility toggling with OAuth profile in demo.load was causing
"Max challenge attempts exceeded" errors. Simplified to always show
the chat interface with login button visible.

app.py

@@ -866,79 +866,59 @@ def create_demo() -> gr.Blocks:
             """
         )
 
-        # Login prompt (shown when not logged in)
-        with gr.Column(visible=True) as login_prompt:
-            gr.HTML(
-                """
-                <div style="text-align: center; padding: 40px 20px;">
-                    <p style="color: #666; margin-bottom: 20px;">
-                        Please sign in with HuggingFace to use the Video Analyzer.
-                    </p>
-                </div>
-                """
-            )
-            with gr.Row(elem_classes="center-row"):
-                gr.LoginButton()
-
-        # Chat interface (hidden until login)
-        with gr.Column(visible=False) as chat_interface:
-            chatbot = gr.Chatbot(
-                label="Video Analyzer",
-                height=400,
-                type="messages",
+        # Login button row
+        with gr.Row():
+            gr.LoginButton()
+
+        # Chat interface
+        chatbot = gr.Chatbot(
+            label="Video Analyzer",
+            height=400,
+            type="messages",
+        )
+
+        # Text input row
+        with gr.Row():
+            msg_input = gr.Textbox(
+                label="Message",
+                placeholder="Paste a YouTube URL or ask a question...",
+                scale=5,
+                lines=1,
             )
+            send_btn = gr.Button("Send", variant="primary", scale=1)
 
-            # Text input row
+        # Voice input/output row
+        with gr.Accordion("Voice Mode", open=False):
+            gr.Markdown("*Speak to ask questions and hear responses*")
             with gr.Row():
-                msg_input = gr.Textbox(
-                    label="Message",
-                    placeholder="Paste a YouTube URL or ask a question...",
-                    scale=5,
-                    lines=1,
-                )
-                send_btn = gr.Button("Send", variant="primary", scale=1)
-
-            # Voice input/output row
-            with gr.Accordion("Voice Mode", open=False):
-                gr.Markdown("*Speak to ask questions and hear responses*")
-                with gr.Row():
-                    voice_input = gr.Audio(
-                        sources=["microphone"],
-                        type="filepath",
-                        label="Click to record your question",
-                        scale=3,
-                    )
-                    voice_btn = gr.Button("Send Voice", variant="secondary", scale=1)
-
-                audio_output = gr.Audio(
-                    label="Response",
+                voice_input = gr.Audio(
+                    sources=["microphone"],
                     type="filepath",
-                    autoplay=True,
+                    label="Click to record your question",
+                    scale=3,
                 )
+                voice_btn = gr.Button("Send Voice", variant="secondary", scale=1)
 
-            with gr.Row():
-                kb_status = gr.Markdown()
-                clear_btn = gr.Button("Clear Chat", size="sm")
+            audio_output = gr.Audio(
+                label="Response",
+                type="filepath",
+                autoplay=True,
+            )
+
+        with gr.Row():
+            kb_status = gr.Markdown()
+            clear_btn = gr.Button("Clear Chat", size="sm")
 
         # Initialize session on load
         def init_session(
             current_state: SessionState | None,
-            profile: gr.OAuthProfile | None = None,
-        ) -> tuple[list[dict], str, SessionState, gr.Column, gr.Column]:
+        ) -> tuple[list[dict], str, SessionState]:
             """Initialize session state and welcome message."""
             if current_state is None:
-                current_state = create_session_state(profile)
-            welcome = get_welcome_message(profile)
+                current_state = create_session_state(None)
+            welcome = get_welcome_message(None)
             stats = get_knowledge_stats(current_state)
-            # Show chat interface only if logged in
-            is_logged_in = profile is not None
-            return (
-                welcome,
-                stats,
-                current_state,
-                gr.Column(visible=not is_logged_in),  # login_prompt
-                gr.Column(visible=is_logged_in),  # chat_interface
-            )
+            return welcome, stats, current_state
 
         def handle_voice_chat(
             audio_path: str,
@@ -1013,7 +993,7 @@ def create_demo() -> gr.Blocks:
         demo.load(
             fn=init_session,
             inputs=[session_state],
-            outputs=[chatbot, kb_status, session_state, login_prompt, chat_interface],
+            outputs=[chatbot, kb_status, session_state],
         )
 
     return demo