feat: local offline voice models (sherpa-onnx) with model manager and wake word (v2.1.0)

- electron/voice: model catalog (Whisper base/small/turbo, SenseVoice, Kokoro v1.0,
  Piper fr), streaming tar.bz2 downloader with progress, sherpa-onnx worker running in
  an Electron utilityProcess (transcribe / synthesize / status / unload), IPC + bridge.
- Renderer: 'local' providers for STT and TTS, Settings → Modèles locaux (download,
  progress, delete, activate), speaker selection, hands-free wake word with a tolerant
  matcher (accents, punctuation, edit distance) and attention window after a bare wake word.
- Packaging: native addon and worker unpacked from the asar; release 2.1.0.

Validated on Linux: Kokoro (fr) → Whisper base round trip, Piper (fr) → Whisper round trip.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017Wn5VX9HNbJ7N54hR24u9Y

tests/wakeWord.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from 'vitest';
+import { matchWakeWord } from '../src/services/voice/voiceController';
+
+describe('matchWakeWord', () => {
+  it('accepts the wake word with punctuation, accents and small slips', () => {
+    expect(matchWakeWord('Jarvis, quelle heure est-il ?', 'jarvis')).toEqual({ matched: true, rest: 'quelle heure est-il ?' });
+    expect(matchWakeWord('Javis allume la lumière', 'jarvis')).toEqual({ matched: true, rest: 'allume la lumière' });
+    expect(matchWakeWord('JARVIS.', 'jarvis')).toEqual({ matched: true, rest: '' });
+    expect(matchWakeWord('Hé Jarvis, bonjour', 'hé jarvis')).toEqual({ matched: true, rest: 'bonjour' });
+  });
+  it('rejects unrelated speech', () => {
+    expect(matchWakeWord('Il fait beau aujourd’hui', 'jarvis').matched).toBe(false);
+    expect(matchWakeWord('Service client', 'jarvis').matched).toBe(false);
+    expect(matchWakeWord('', 'jarvis').matched).toBe(false);
+  });
+});