Reverts the regressions from b63b694 on the server-fallback path:
P0 — fetchBeatAudio non-BYO branch was a bare return; every non-BYO
user got silent playback regardless of server TTS config. Re-connect
to /api/beat-audio with the beatAudioAbortRef signal, count 204/!ok
as silence strikes, create a blob URL on success.
P1 — stripVoicesForTransport + mergeCharactersPreserveVoice were
deleted, so the server-fallback path re-sent ~160KB
referenceAudioBase64 per character on every request AND lost voices
for already-known characters after scene 1. Re-add both, applied
ONLY on the server-fallback branches in engineClient.ts (BYO
client-direct path untouched).
P3 — the aborted-before-store blob URL race had no revoke, leaking
one blob URL per cancelled synth. Re-add the else-if revoke.
P2 — handleSettingsSaved ignored ttsConfigured, so a BYO key entered
mid-session only took effect after a page reload. Re-add the ref/state
refresh + audio re-prefetch. Also restore the silence-nudge UI
(silenceStrikes counter, SILENCE_NUDGE_THRESHOLD, dismissible pill
beside the mute toggle) that surfaces BYO-key guidance when the
shared server key is being rate-limited.
Verified live: /api/beat-audio now returns 200 (was 0 calls under
the bug); audio plays after synth completes.
yuanzonghao
2f6e67bd80