Remove duplicate headers and Back buttons from mode interfaces

- Remove duplicate headers from enhanced_verification_ui.py
- Remove duplicate headers from manual_input_interface.py
- Remove duplicate headers from file_upload_interface.py
- Headers and Back buttons are now only in enhanced_verification_interface.py
- Fixes duplicate UI elements issue

src/interface/enhanced_verification_ui.py

@@ -385,13 +385,7 @@ class EnhancedVerificationUIComponents:
         controller = EnhancedDatasetInterfaceController()
         
         with gr.Blocks() as enhanced_dataset_interface:
-            gr.Markdown("# 📊 Enhanced Dataset Mode")
-            gr.Markdown("Select and customize test datasets for verification. You can edit existing datasets or create new test cases.")
-            
-            # Back to mode selection
-            back_to_modes_btn = StandardizedComponents.create_navigation_button("Back to Mode Selection")
-            
-            # Application state
+            # Application state (headers and back button are in parent interface)
             current_dataset_state = gr.State(value=None)
             verification_session_state = gr.State(value=None)
             

src/interface/file_upload_interface.py

@@ -589,11 +589,7 @@ def create_file_upload_interface() -> gr.Blocks:
     controller = FileUploadInterfaceController()
     
     with gr.Blocks() as file_upload_interface:
-        gr.Markdown("# 📁 File Upload Mode")
-        gr.Markdown("Upload CSV or XLSX files containing test messages for batch processing and verification.")
-        
-        # Back to mode selection
-        back_to_modes_btn = StandardizedComponents.create_navigation_button("Back to Mode Selection")
+        # Headers and back button are in parent interface
         
         # Application state
         current_file_result_state = gr.State(value=None)

src/interface/manual_input_interface.py

@@ -478,14 +478,7 @@ def create_manual_input_interface() -> gr.Blocks:
     controller = ManualInputController()
     
     with gr.Blocks() as manual_input_interface:
-        gr.Markdown("# ✏️ Manual Input Mode")
-        gr.Markdown("""
-        Enter individual messages for immediate classification and verification. 
-        Perfect for testing specific scenarios or exploring edge cases in real-time.
-        """)
-        
-        # Back to mode selection
-        back_to_modes_btn = StandardizedComponents.create_navigation_button("Back to Mode Selection")
+        # Headers and back button are in parent interface
         
         # Session setup section
         with gr.Row():