Update app.py via AI Editor

app.py

@@ -50,8 +50,8 @@ def get_or_create_session_data(session_id):
                 'uploaded_file': None,
                 'uploaded_filename': None,
                 'lock': threading.Lock(),
-                'slide_markdowns': [],  # store generated slide markdowns as list of dicts
-                'slide_markdown_names': [],  # Friendly names for dropdown
+                'slide_markdowns': [],
+                'slide_markdown_names': [],
                 'current_slide_md': "",
             }
         return SESSION_DATA[session_id]
@@ -81,6 +81,8 @@ app.layout = html.Div([
     '''),
     html.A(id='uploaded-file-download-link', href="", style={'display': 'none'}),
     html.A(id='pptx-download-link', href="", style={'display': 'none'}),
+    # Dummy hidden dropdown to avoid Dash Input error
+    dcc.Dropdown(id='slide-generation-list', style={'display': 'none'}),
     dbc.Container([
         dbc.Row([
             dbc.Col([
@@ -326,7 +328,6 @@ def unified_callback(upload_contents, gen_btn, gen_ppt_btn, selected_slide_idx,
             )
         log_str = '\n'.join(session['log_messages'][:100])
 
-    # Build slide markdown dropdown
     dropdown_options = [
         {'label': slide_name, 'value': idx}
         for idx, slide_name in enumerate(slide_list)
@@ -343,7 +344,6 @@ def unified_callback(upload_contents, gen_btn, gen_ppt_btn, selected_slide_idx,
         )
     ]) if slide_list else html.Div("No slides generated yet.", className="text-muted")
 
-    # Handle triggers
     if button_id == 'upload-file':
         if upload_contents and upload_filename:
             try:
@@ -397,7 +397,6 @@ def unified_callback(upload_contents, gen_btn, gen_ppt_btn, selected_slide_idx,
             slides_markdown = process_document(combined_text, session_id)
             add_log("Slide generation completed.", session_id)
             with session['lock']:
-                # Add as new slide set to session
                 slide_name = f"Slides {time.strftime('%Y-%m-%d %H:%M:%S')}"
                 session['slide_markdowns'].append(slides_markdown)
                 session['slide_markdown_names'].append(slide_name)