feat: Add microphone selection and audio playback to FloatingVoice

- Add microphone device enumeration and selector dropdown
- Show current microphone name with click-to-change UI
- Microphone selection only available with Whisper GPU mode
- Add audio playback button to replay last recorded audio for debugging
- Improve dropdown animations with staggered item transitions
- Fix FloatingTerminal token request to type character by character

frontend/src/components/FloatingTerminal.vue

@@ -384,7 +384,19 @@ function requestToken() {
   if (socket && socket.readyState === WebSocket.OPEN) {
     tokenBuffer = ''
     waitingForToken.value = true
-    socket.send(JSON.stringify({ type: 'input', data: 'genera token usando tu mcp\r' }))
+
+    // Send character by character then Enter (same as VoiceFloat)
+    const text = 'genera token usando tu mcp'
+    const chars = (text + '\r').split('')
+    let i = 0
+    const typeChar = () => {
+      if (i < chars.length && socket && socket.readyState === WebSocket.OPEN) {
+        socket.send(JSON.stringify({ type: 'input', data: chars[i] }))
+        i++
+        setTimeout(typeChar, 15)
+      }
+    }
+    typeChar()
   }
 }