When a request to `/api/auth/login` or `/api/auth/passkey/login-verify`
carries `X-Client-Type: native` (or a `User-Agent` matching `HealthLog-iOS`),
the response now also contains a 90-day `hlk_*` Bearer token alongside
the user object. Browser sessions continue to receive the cookie only —
no extra payload, no behaviour change for them.
Token issuance is gated by header detection in `src/lib/auth/issue-token.ts`
and re-uses the existing `ApiToken` table + HMAC pipeline; nothing new on
the storage side. Audit log records `auth.token.autoissue.native` so each
auto-issued token is traceable to its login event.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
