New profanity.js does whole-word matching against a Russian/English
root list (avoids false positives like "победа", "тебя", "сукно").
Applied once per message before it's used anywhere downstream
(display, TTS, AI reply input) — screen shows "..." in place of a
censored word, while the TTS text uses "бип" so it's heard as a beep
instead of read literally.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
