Same CJS-compatible pattern as batch 1 (import express = require;
const {...} = require for internal utils; export = router). No
behavior change — TS only strips annotations during compile.
AI route touchpoints:
/api/generate-hpi-encounter, /generate-hpi-dictation → hpi.ts
/api/generate-soap → soap.ts
/api/refine, /shorten, /clarify → refine.ts
/api/text-to-speech → tts.ts
/api/transcribe, /transcribe/status → transcribe.ts
All five handlers retain identical request/response shapes; the
shared/types.ts contract was defined on day 2 from these very files.
One fetch() typing fix: the transcribe route's LiteLLM branch uses
DOM fetch, but the file imports Express's Response type, so the
`.then((r: Response) => ...)` annotation was shadowing the global
Response. Removed the explicit annotation — tsc infers correctly.
Progress: 9 of 54 files migrated. tsc --noEmit green.
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