fix: auto-submit question - use .change() instead of .stop_recording()

.stop_recording fires before audio value is committed in Gradio 5.35.
.change fires after the value is set, ensuring audio_path is available.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

app.py

@@ -1099,10 +1099,18 @@ with gr.Blocks(title="MomsVoice", css=css_code) as demo:
         outputs=[answer_display, answer_audio]
     )
 
-    # Auto-submit when voice recording stops
-    question_audio.stop_recording(
-        handle_question_submit,
-        inputs=[question_text, question_audio, paragraphs_state, timeline_slider, voice_profile_state],
+    # Auto-submit when voice recording completes
+    # .stop_recording may fire before audio value is committed in Gradio 5.35
+    # .change fires after the value is set — use it with a guard to avoid triggering on clear
+    def auto_submit_on_audio_change(audio_path, question_txt, paragraphs, slider_val, profile_id):
+        """Auto-submit only when a new recording is available (not on clear)."""
+        if not audio_path:
+            return gr.update(), gr.update()
+        return handle_question_submit(question_txt, audio_path, paragraphs, slider_val, profile_id)
+
+    question_audio.change(
+        auto_submit_on_audio_change,
+        inputs=[question_audio, question_text, paragraphs_state, timeline_slider, voice_profile_state],
         outputs=[answer_display, answer_audio]
     )