chore: remove unused TTS/STT type aliases in api_protos

[detail-app]

Description

Removed 21 unused export type X = z.infer<typeof xxxSchema> aliases from agents/src/inference/api_protos.ts — 13 TTS aliases and 8 STT aliases. The underlying Zod schemas are retained (still composed into the consumed union schemas); only the orphaned type-only exports are removed.

Changes Made

• Removed 13 TTS type aliases (TtsGenerationConfig, TtsSessionCreateEvent, TtsInputTranscriptEvent, TtsSessionFlushEvent, TtsSessionCloseEvent, TtsSessionCreatedEvent, TtsOutputAudioEvent, TtsWordTimestamp, TtsCharTimestamp, TtsOutputAlignmentEvent, TtsDoneEvent, TtsSessionClosedEvent, TtsErrorEvent).
• Removed 8 STT type aliases (SttWord, SttStartOfSpeechEvent, SttSessionCreatedEvent, SttSessionFinalizedEvent, SttSessionClosedEvent, SttErrorEvent, SttKnownServerEvent, SttUnknownServerEvent).

Pre-Review Checklist

• Build passes: All builds (lint, typecheck, tests) pass locally
• AI-generated code reviewed: Removed unnecessary comments and ensured code quality
• Changes explained: All changes are properly documented and justified above
• Scope appropriate: All changes relate to the PR title, or explanations provided for why they're included
• Video demo: N/A (type-only dead code removal)

Testing

• Automated tests added/updated (if applicable) — no test changes needed; removed symbols had zero test references
• All tests pass (pnpm vitest run for inference: 17 files, 283 passed)
• pnpm build, pnpm typecheck, pnpm lint, and pnpm api:check (api-extractor) all pass

Additional Notes

These aliases were dead: they had zero references anywhere in the codebase (agents, plugins, examples, tests) and were not re-exported through any barrel file or included in the package's public API surface (their containing schema siblings remain exported). Behavior and runtime outputs are unchanged — this is a pure type-only removal. Each removed alias is trivially recreatable via z.infer<typeof xxxSchema> if a future consumer needs it.

AI tooling used: Detail: Dead Code

History

• Last materially changed July 2026 (fix(inference): report Ink-2 speech onset when the provider detects it #2182 @rosetta-livekit-bot[bot])

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.