Fix Gradio 6.x Button '_id' attribute error in verification UI

- Changed gr.Blocks() pattern to 'with gr.Blocks() as interface'
- Pre-compute initial values before Blocks context
- Define event handlers before Blocks context
- Pass initial values directly to component constructors
- Add cancel_correction_btn handler

src/interface/conversation_verification_ui.py

@@ -37,11 +37,37 @@ class VerificationInterface:
         """
         self.current_session = session
         self.current_record_index = 0
+        
+        # Pre-compute initial values
+        if session.verification_records:
+            initial_exchange_html = self._render_exchange_review(session.verification_records[0])
+            initial_position_html = f"Exchange 1 of {len(session.verification_records)}"
+        else:
+            initial_exchange_html = "No exchanges to verify"
+            initial_position_html = "No exchanges"
+        
+        initial_stats_html = self._render_statistics(session)
+        initial_progress_html = self._render_progress_bar(session)
+        initial_nav_html = self._render_navigation_info(session)
 
-        # Create interface without theme for HF Spaces compatibility
-        interface = gr.Blocks(title=f"Verify Conversation - {session.patient_name}")
+        # Define event handlers before creating the interface
+        def handle_correct_click():
+            return self._handle_correct_feedback_simple()
+        
+        def show_correction_section():
+            return gr.update(visible=True)
         
-        with interface:
+        def hide_correction_section():
+            return gr.update(visible=False)
+        
+        def handle_export_click():
+            return self._export_results_simple()
+        
+        def handle_mark_all_correct():
+            return self._mark_all_remaining_correct_simple()
+
+        # Create interface without theme for HF Spaces compatibility
+        with gr.Blocks(title=f"Verify Conversation - {session.patient_name}") as interface:
             
             # Session header
             with gr.Row():
@@ -56,19 +82,19 @@ class VerificationInterface:
             
             # Progress section
             with gr.Row():
-                progress_bar = gr.HTML(value=self._render_progress_bar(session))
+                progress_bar = gr.HTML(value=initial_progress_html)
                 
             with gr.Row():
                 with gr.Column(scale=1):
-                    stats_display = gr.HTML(value=self._render_statistics(session))
+                    stats_display = gr.HTML(value=initial_stats_html)
                 with gr.Column(scale=1):
-                    navigation_info = gr.HTML(value=self._render_navigation_info(session))
+                    navigation_info = gr.HTML(value=initial_nav_html)
 
             # Main verification area
             with gr.Row():
                 with gr.Column(scale=3):
                     # Current exchange display
-                    exchange_display = gr.HTML(value="", label="Current Exchange")
+                    exchange_display = gr.HTML(value=initial_exchange_html, label="Current Exchange")
                     
                     # Verification buttons
                     with gr.Row():
@@ -116,7 +142,7 @@ class VerificationInterface:
                             prev_btn = gr.Button("⬅️ Previous", scale=1)
                             next_btn = gr.Button("Next ➡️", scale=1)
                         
-                        current_position = gr.HTML(value="Exchange 1 of 1")
+                        current_position = gr.HTML(value=initial_position_html)
                         
                         # Quick actions
                         gr.Markdown("### Quick Actions")
@@ -130,51 +156,28 @@ class VerificationInterface:
                         gr.Markdown("### Export Results")
                         export_btn = gr.Button("📊 Export to CSV", variant="primary")
                         export_status = gr.HTML(value="")
-
-            # Initialize interface with first exchange data
-            if session.verification_records:
-                initial_exchange_html = self._render_exchange_review(session.verification_records[0])
-                initial_position_html = f"Exchange 1 of {len(session.verification_records)}"
-                initial_stats_html = self._render_statistics(session)
-                initial_progress_html = self._render_progress_bar(session)
-                
-                exchange_display.value = initial_exchange_html
-                current_position.value = initial_position_html
-                stats_display.value = initial_stats_html
-                progress_bar.value = initial_progress_html
-            else:
-                exchange_display.value = "No exchanges to verify"
-                current_position.value = "No exchanges"
-            
-            # Event handlers - simplified for HF Spaces compatibility
-            def handle_correct_click():
-                return self._handle_correct_feedback_simple()
             
+            # Wire up event handlers
             correct_btn.click(
                 fn=handle_correct_click,
                 outputs=[exchange_display, current_position, stats_display, progress_bar]
             )
             
-            def show_correction_section():
-                return gr.update(visible=True)
-            
             incorrect_btn.click(
                 fn=show_correction_section,
                 outputs=[correction_section]
             )
             
-            def handle_export_click():
-                return self._export_results_simple()
+            cancel_correction_btn.click(
+                fn=hide_correction_section,
+                outputs=[correction_section]
+            )
             
             export_btn.click(
                 fn=handle_export_click,
                 outputs=[export_status]
             )
             
-            # Simplified handlers for basic functionality
-            def handle_mark_all_correct():
-                return self._mark_all_remaining_correct_simple()
-            
             mark_all_correct_btn.click(
                 fn=handle_mark_all_correct,
                 outputs=[exchange_display, current_position, stats_display, progress_bar]