feat: Add push-to-talk keyboard shortcut (Ctrl+S) to FloatingVoice

- Hold Ctrl+S for 500ms to start recording
- Release to stop recording and send to terminal
- Shows PTT indicator when using keyboard shortcut

frontend/src/components/FloatingVoice.vue

@@ -38,11 +38,16 @@ const WS_URL = `ws://${window.location.hostname}:4103`
 let socket: WebSocket | null = null
 const connected = ref(false)
 
+// Push-to-talk state (Ctrl+S)
+let keyDownTime = 0
+let holdTimeout: number | null = null
+const isPushToTalk = ref(false)
+
 const displayText = computed(() => {
   if (interimTranscript.value) {
     return transcript.value + ' ' + interimTranscript.value
   }
-  return transcript.value || 'Presiona el micrófono para comenzar...'
+  return transcript.value || 'Presiona el micrófono o mantén Ctrl+S...'
 })
 
 const containerStyle = computed(() => {
@@ -146,12 +151,13 @@ function clearTranscript() {
 }
 
 function connectSocket() {
+  console.log('[Voice] connectSocket called, current socket:', socket?.readyState)
   if (socket && socket.readyState === WebSocket.OPEN) return
 
   socket = new WebSocket(WS_URL)
 
   socket.onopen = () => {
-    console.log('[Voice] WebSocket connected')
+    console.log('[Voice] WebSocket connected, readyState:', socket?.readyState)
     connected.value = true
   }
 
@@ -246,16 +252,115 @@ function stopDrag() {
   document.removeEventListener('mouseup', stopDrag)
 }
 
+// Keyboard shortcut handlers (Ctrl+S)
+function handleKeyDown(e: KeyboardEvent) {
+  if (e.ctrlKey && e.key.toLowerCase() === 's') {
+    e.preventDefault()
+
+    // Ignore if already holding
+    if (keyDownTime > 0) return
+
+    keyDownTime = Date.now()
+
+    // Open panel and connect if not open
+    if (!isOpen.value) {
+      isOpen.value = true
+    }
+
+    // Start recording after 500ms hold
+    holdTimeout = window.setTimeout(() => {
+      if (keyDownTime > 0 && !isRecording.value) {
+        isPushToTalk.value = true
+        startRecording()
+      }
+    }, 500)
+  }
+}
+
+function handleKeyUp(e: KeyboardEvent) {
+  // Only react to 's' key release, ignore Control
+  if (e.key.toLowerCase() === 's' && keyDownTime > 0) {
+    console.log('[Voice] Key S released, isPushToTalk:', isPushToTalk.value, 'isRecording:', isRecording.value)
+
+    if (holdTimeout) {
+      clearTimeout(holdTimeout)
+      holdTimeout = null
+    }
+
+    // If was push-to-talk recording, stop and send after 500ms
+    if (isPushToTalk.value && isRecording.value) {
+      console.log('[Voice] Stopping recording, will send in 500ms')
+      stopRecording()
+      setTimeout(() => {
+        console.log('[Voice] Sending transcript:', transcript.value.trim())
+        console.log('[Voice] Socket state:', socket?.readyState)
+        if (transcript.value.trim()) {
+          sendTranscriptAndClose()
+        } else {
+          // No transcript, just close
+          isPushToTalk.value = false
+          close()
+        }
+      }, 500)
+    }
+
+    keyDownTime = 0
+  }
+}
+
+// Send and close for push-to-talk mode
+function sendTranscriptAndClose() {
+  console.log('[Voice] sendTranscriptAndClose called')
+  const text = transcript.value.trim()
+  if (!text) {
+    console.log('[Voice] No text, closing')
+    isPushToTalk.value = false
+    close()
+    return
+  }
+
+  console.log('[Voice] Text to send:', text)
+  console.log('[Voice] Socket:', socket, 'readyState:', socket?.readyState)
+
+  if (!socket || socket.readyState !== WebSocket.OPEN) {
+    canvasStore.showNotification('Not connected to terminal', 'error')
+    isPushToTalk.value = false
+    return
+  }
+
+  // Send text character by character then Enter
+  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)
+    } else if (i >= chars.length) {
+      canvasStore.showNotification('Voice message sent', 'success')
+      clearTranscript()
+      isPushToTalk.value = false
+      close()
+    }
+  }
+  typeChar()
+}
+
 onMounted(() => {
   recognition = initRecognition()
+  document.addEventListener('keydown', handleKeyDown)
+  document.addEventListener('keyup', handleKeyUp)
 })
 
 onBeforeUnmount(() => {
   stopRecording()
   recognition = null
   disconnectSocket()
+  document.removeEventListener('keydown', handleKeyDown)
+  document.removeEventListener('keyup', handleKeyUp)
   document.removeEventListener('mousemove', onDrag)
   document.removeEventListener('mouseup', stopDrag)
+  if (holdTimeout) clearTimeout(holdTimeout)
 })
 
 // Connect when panel opens, disconnect when closes
@@ -298,7 +403,7 @@ defineExpose({
                 <line x1="8" y1="23" x2="16" y2="23"/>
               </svg>
               <span>Voice</span>
-              <i class="dot" :class="{ recording: isRecording }"></i>
+              <i class="dot" :class="{ recording: isRecording, ptt: isPushToTalk }"></i>
             </div>
             <div class="window-controls">
               <button class="x" @click="close" title="Close">
@@ -316,7 +421,7 @@ defineExpose({
               <span class="final">{{ transcript }}</span>
               <span class="interim">{{ interimTranscript }}</span>
               <span v-if="!transcript && !interimTranscript" class="placeholder">
-                Presiona el micrófono para comenzar...
+                Presiona el micrófono o mantén Ctrl+S...
               </span>
             </div>
 
@@ -431,6 +536,11 @@ defineExpose({
   animation: pulse 0.8s infinite;
 }
 
+.dot.ptt {
+  background: #f90;
+  box-shadow: 0 0 6px #f90;
+}
+
 @keyframes pulse {
   0%, 100% { opacity: 1; }
   50% { opacity: 0.5; }