Fix gr.File type and restore VIVA tab

app.py

@@ -621,7 +621,7 @@ with gr.Blocks(title="AnatomyBot - MBBS Anatomy Tutor") as demo:
         # BOOK LEARNING MODE TAB
         with gr.Tab("📖 Book Learning Mode") as book_tab:
             # Upload PDF
-            pdf_upload = gr.File(label="Upload Anatomy Textbook (PDF)", file_types=[".pdf"], type="bytes")
+            pdf_upload = gr.File(label="Upload Anatomy Textbook (PDF)", file_types=[".pdf"], type="binary")
             upload_status = gr.Markdown()
             
             # State to hold extracted images and captions
@@ -671,6 +671,29 @@ with gr.Blocks(title="AnatomyBot - MBBS Anatomy Tutor") as demo:
             
             page_dropdown.change(fn=show_page_analysis, inputs=[page_dropdown, book_images_state, page_captions_state], outputs=[selected_page_image, analysis_output])
         
+        # VIVA MODE TAB
+        with gr.Tab("🎯 VIVA Training Mode") as viva_tab:
+            viva_status = gr.Markdown("Click 'Start VIVA Training' from Learning Mode after studying a topic!")
+            
+            with gr.Column(visible=False) as viva_container:
+                with gr.Row():
+                    with gr.Column(scale=1):
+                        viva_image = gr.Image(label="Reference Image", type="pil", interactive=False)
+                    
+                    with gr.Column(scale=2):
+                        current_question_display = gr.Markdown("### Question will appear here")
+                        hint_display = gr.Markdown("💡 Hint will appear here")
+                        
+                        student_answer = gr.Textbox(
+                            label="Your Answer",
+                            placeholder="Type your answer here...",
+                            lines=4
+                        )
+                        
+                        submit_answer_btn = gr.Button("Submit Answer", variant="primary")
+                        
+                        feedback_display = gr.Markdown("Feedback will appear here after you submit your answer")
+        
 
     
     # Event handlers for Learning Mode