feat: character dashboard with TTS voice preview, fix Wyoming API compat

- Add HomeAI dashboard: service status monitor, character profile manager, character editor
- Add TTS voice preview in character editor (Kokoro via OpenClaw bridge → Wyoming)
  - Custom preview text, loading/playing states, stop control, speed via playbackRate
- Fix Wyoming API breaking changes: remove `version` from TtsVoice/TtsProgram,
  use SynthesizeVoice object instead of bare string in Synthesize calls
- Vite dev server proxies /api/tts and /api/health to avoid CORS issues

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

homeai-voice/tts/wyoming_kokoro_server.py

@@ -56,7 +56,6 @@ class KokoroEventHandler(AsyncEventHandler):
                         url="https://github.com/thewh1teagle/kokoro-onnx",
                     ),
                     installed=True,
-                    version="1.0.0",
                     voices=[
                         TtsVoice(
                             name=self._default_voice,
@@ -64,7 +63,6 @@ class KokoroEventHandler(AsyncEventHandler):
                             attribution=Attribution(name="kokoro", url=""),
                             installed=True,
                             languages=["en-us"],
-                            version="1.0",
                             speakers=[TtsVoiceSpeaker(name=self._default_voice)],
                         )
                     ],