[maxmad64bis]

⚠️ base-red inherited: #15306

Summary

The translation request carries no reasoning control, so models that reason spend most of the run thinking through a short translation task instead of emitting the translation. The request builder has no field for that control, which keeps the long thinking path on for those requests. The change adds an optional setting that stays off when unset and forwards the trimmed value to the request body only when the operator sets it.

Related Issues

• No linked issue — reproduced on the release base

Validation

• Change type: i18n
• Focused tests and category gates from the golden path
• npm run lint
• Reconciled with the current active release base; focused checks rerun afterward
• Production-code changes include a new or updated automated test in this PR

Tests Added Or Updated

• tests/unit/i18n-translate-backend.test.ts: covers unset, empty and blank values (field stays absent), the trimmed forwarded value, the exact request body without the field, and the retry path keeping the field.

Coverage Notes

N/A — no touched file lives under src/, open-sse/, electron/ or bin/.

Reviewer Notes

• Behavior: off by default (request body unchanged when unset); when set, the trimmed value is forwarded on the request body including retries; a reasoning model answered the same prompt in 5.7 s instead of 53.6 s with the value set.
• Merge: shares only .env.example and docs/reference/ENVIRONMENT.md with fix(proxy-health): skip sweep probes already proven by recent production successes #14805, feat(proxies): accept operator-provided dated egress observations for pool members #15314, feat(proxy-subscription): reload the proxy core after a verified config replacement #15238, feat(proxy-subscription): prune nodes the core check rejects, then retry verification #15295 and feat(proxy-subscription): verify the generated core configuration before replacing the file #15142, in either order; shares the translation backend and its unit test with feat(i18n): translate several locales per request in sync-ui-keys #15562, in either order; shares the base files of the proxy-core config stack with feat(proxy-subscription): warn with a translated count when generation skips entries #15564, in either order.
• Follow-up: run the 11-language batch with the value set to confirm the faster timing on a model that honors the field.