ui: remove text input box from Q&A - voice only

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

app.py

@@ -542,14 +542,11 @@ with gr.Blocks(title="MomsVoice", css=css_code) as demo:
                     with gr.Group(visible=False) as qa_input_group:
                         question_audio = gr.Audio(
                             sources=["microphone"], type="filepath",
-                            label="🎤 Ask your question — answer generates automatically when you stop",
+                            label="🎤 Ask your question — answer generates when you stop recording",
                             show_label=True, streaming=False,
                             elem_id="qa_audio_input",
                         )
-                        question_text = gr.Textbox(
-                            placeholder="Or type your question here...",
-                            label="Type instead", lines=1, show_label=True
-                        )
+                        question_text = gr.Textbox(visible=False)
                         submit_question_btn = gr.Button("🔍 Get Answer in Narrator's Voice", variant="primary")
 
                     answer_display = gr.HTML(visible=False)