Refine microphone UI in demo interface by hiding the dropdown selector and unnecessary labels, enhancing user experience while maintaining functionality.

app.py

@@ -606,12 +606,10 @@ def create_demo():
             0%, 100% { transform: scale(1.0); box-shadow: 0 20px 40px rgba(239,68,68,0.4), 0 0 0 0 rgba(239,68,68,0.5); }
             50% { transform: scale(1.05); box-shadow: 0 25px 50px rgba(239,68,68,0.5), 0 0 0 15px rgba(239,68,68,0.0); }
         }
-        /* Hide all microphone UI chrome except the bubble itself */
-        #voice-bubble .mic-dropdown, 
-        #voice-bubble select,
-        #voice-bubble .source-selection,
-        #voice-bubble button:not(.record-button) { display: none !important; }
-        #voice-bubble .controls { display: none !important; }
+        /* Hide microphone dropdown selector only */
+        #voice-bubble select { display: none !important; }
+        #voice-bubble .source-selection { display: none !important; }
+        #voice-bubble label[for] { display: none !important; }
         /* Hide TTS player UI but keep it in DOM for autoplay */
         #tts-player { width: 0 !important; height: 0 !important; opacity: 0 !important; position: absolute; pointer-events: none; }
         '''