chore: fix UI markdown and enable clean old keys

app.py

@@ -50,6 +50,9 @@ def clean_tmp_directory():
 
 
 def keygen():
+    # Clean tmp directory if needed
+    clean_tmp_directory()
+
     print("Initializing FHEModelClient...")
 
     # Let's create a user_id
@@ -243,12 +246,13 @@ with demo:
         "Enter a sensitive text message you received and would like to do sentiment analysis on (ideas: the last text message of your boss.... or lover)."
     )
     text = gr.Textbox(label="Enter a message:", value="I really like your work recently")
+
+    gr.Markdown("# Step 3: Encode the message with the private key")
     b_encode_quantize_text = gr.Button(
         "Encode, quantize and encrypt the text with transformer vectorizer, and send to server"
     )
     size_text = gr.Number(label="Size of the text (in bytes):", value="0", interactive=False)
 
-    gr.Markdown("# Step 3: Encode the message with the private key")
     with gr.Row():
         encoding = gr.Textbox(
             label="Transformer representation:",