1. Sample text: expose initCloneSampleText as a window function and call
it from nav.js runSideEffects when the clone section is activated,
ensuring the textarea is always populated even if the IIFE ran before
the element existed.
2. Better sample texts: all 8 languages rewritten to ~38 words / ~15 s,
first-person, phonetically rich, proper Unicode diacritics.
3. Live mic monitor: a level-meter (18-bar) + scrolling oscilloscope
canvas (ring-buffer, 300 px, colour-coded) added to the microphone
card. "Check level" / "Stop monitor" buttons start/stop it
independently; clicking Record starts it automatically.
Uses raw mic constraints (no echo-cancel / AGC) for cleaner voice clone
audio. Mic gain slider and dB readout included.
4. Recording quality: MediaRecorder now requests audioBitsPerSecond:256000
in both voice-clone.js and stt.js.
5. STT engine picker: Recognition engine <select> + Refresh button added
above the Auto-transcribe button in Step 3. refreshSttBackends() now
syncs both stt-tts-stt-backend and clone-stt-backend. The transcribe
call passes the chosen backend to /api/transcribe.
6. File input: explicit extension list added to accept= for OGG/OPUS.
7. CSS: .mic-live-wave style added (dark/light theme variants).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>