feat: Add Whisper GPU speech-to-text with progressive transcription

- Add faster-whisper Python server for GPU-accelerated transcription
- Support dual mode: Web Speech API or Whisper GPU (toggleable)
- Progressive transcription every 3 seconds while recording
- Separate terminal server process (stable during hot-reload)
- Add Ctrl+V paste and Ctrl+C copy support in FloatingTerminal
- Add MCP tools: whisper_start, whisper_stop, whisper_toggle, whisper_status
- Update package.json with separate api/terminal/frontend processes

server/routes/whisper.ts

@@ -0,0 +1,66 @@
+/**
+ * Whisper API routes
+ * Control the local GPU-accelerated speech-to-text server
+ */
+
+import {
+  startWhisperServer,
+  stopWhisperServer,
+  toggleWhisperServer,
+  getWhisperState,
+  getWhisperPort
+} from '../services/whisper'
+
+export async function handleWhisperRoutes(req: Request): Promise<Response | null> {
+  const url = new URL(req.url)
+  const path = url.pathname
+
+  // GET /api/whisper/status - Get current state
+  if (path === '/api/whisper/status' && req.method === 'GET') {
+    const state = await getWhisperState()
+    return Response.json(state)
+  }
+
+  // POST /api/whisper/start - Start Whisper server
+  if (path === '/api/whisper/start' && req.method === 'POST') {
+    const success = await startWhisperServer()
+    const state = await getWhisperState()
+    return Response.json({
+      success,
+      ...state,
+      message: success ? 'Whisper server started' : 'Failed to start Whisper server'
+    })
+  }
+
+  // POST /api/whisper/stop - Stop Whisper server
+  if (path === '/api/whisper/stop' && req.method === 'POST') {
+    const success = stopWhisperServer()
+    const state = await getWhisperState()
+    return Response.json({
+      success,
+      ...state,
+      message: success ? 'Whisper server stopped' : 'Failed to stop Whisper server'
+    })
+  }
+
+  // POST /api/whisper/toggle - Toggle Whisper on/off
+  if (path === '/api/whisper/toggle' && req.method === 'POST') {
+    const result = await toggleWhisperServer()
+    const state = await getWhisperState()
+    return Response.json({
+      ...result,
+      ...state,
+      message: state.enabled ? 'Whisper enabled (GPU)' : 'Whisper disabled (using Web Speech API)'
+    })
+  }
+
+  // GET /api/whisper/port - Get Whisper WebSocket port
+  if (path === '/api/whisper/port' && req.method === 'GET') {
+    return Response.json({
+      port: getWhisperPort(),
+      url: `ws://localhost:${getWhisperPort()}`
+    })
+  }
+
+  return null
+}