Update app.py

app.py

@@ -38,7 +38,7 @@ with gr.Blocks(
     fill_height=True
 ) as app:
     gr.HTML("<div style='text-align:center;overflow:hidden;'><h2>PDF Summarizer</h2></div>")
-    with gr.Sidebar(open=False):
+    with gr.Sidebar.expand():
         api_key = gr.Text(label="Gemini API Key", placeholder="Enter your Google Gemini API key here")
     with gr.Row():
         pdf_input = gr.File(file_types=[".pdf"])