Address PR-agent review findings:
- resolveVoice fast path: replace ambiguous boolean comparison
(voiceProvider === "stepfun") === serverStepfun with explicit
per-provider equality checks. Prevents an undefined or unknown
provider from matching the non-stepfun (xiaomi) branch by accident.
- /api/beat-audio route: reject requests whose voice.provider is present
but not in the VALID_TTS_PROVIDERS whitelist (e.g. "azure"). Previously
such a request would pass validation when fallback fields were also
present, and resolveVoice might use the invalid voice directly instead
of falling back to reprovision — producing a silent beat instead of a
voiced one.
yuanzonghao
65b7daff0b