Update app.py

app.py

@@ -133,9 +133,14 @@ with gr.Blocks(title="AI Python Tutor", theme=theme, fill_height=True) as demo:
     with gr.Row(equal_height=True):
         # Left Column: Chat & Input
         with gr.Column(scale=3, variant="panel"):
+            # Custom Header with Focus Mode Button
+            with gr.Row():
+                gr.Markdown("### 💬 Interactive Session")
+                fullscreen_btn = gr.Button("⛶ Focus Mode", size="sm", variant="secondary", scale=0, min_width=120)
+
             chatbot = gr.Chatbot(
                 height=600, 
-                label="Interactive Session", 
+                show_label=False, # Removed built-in label to match custom header
                 type="messages",
                 bubble_full_width=False,
                 show_copy_button=True,
@@ -165,7 +170,8 @@ with gr.Blocks(title="AI Python Tutor", theme=theme, fill_height=True) as demo:
             )
 
         # Right Column: Resources Dashboard (Tabbed)
-        with gr.Column(scale=2):
+        # We assign 'right_col' so we can toggle its visibility
+        with gr.Column(scale=2) as right_col:
             gr.Markdown("### 🎒 Learning Dashboard")
             
             # Tabbed interface for cleaner look
@@ -202,6 +208,23 @@ with gr.Blocks(title="AI Python Tutor", theme=theme, fill_height=True) as demo:
         
         yield history, "", video_text, article_text, quiz_text
 
+    # --- Focus Mode Logic ---
+    is_fullscreen = gr.State(False)
+
+    def toggle_fullscreen(current_state):
+        new_state = not current_state
+        # If new_state is True (Fullscreen), hide right col. 
+        # If False (Normal), show right col.
+        right_col_update = gr.Column(visible=not new_state)
+        btn_text = "↩ Exit Focus" if new_state else "⛶ Focus Mode"
+        return new_state, right_col_update, btn_text
+
+    fullscreen_btn.click(
+        toggle_fullscreen,
+        inputs=[is_fullscreen],
+        outputs=[is_fullscreen, right_col, fullscreen_btn]
+    )
+
     # Actions
     submit_btn.click(
         respond,