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

package.json

@@ -3,7 +3,10 @@
   "version": "1.0.0",
   "description": "Dynamic canvas for Claude Code interaction",
   "scripts": {
-    "start": "concurrently -n server,frontend -c blue,green \"cd server && bun --watch run index.ts\" \"cd frontend && bun run dev --host\""
+    "start": "concurrently -n api,terminal,frontend -c blue,yellow,green \"cd server && bun --watch run index.ts\" \"cd server && bun run terminal.ts\" \"cd frontend && bun run dev --host\"",
+    "start:api": "cd server && bun --watch run index.ts",
+    "start:terminal": "cd server && bun run terminal.ts",
+    "start:frontend": "cd frontend && bun run dev --host"
   },
   "devDependencies": {
     "concurrently": "^9.2.1"