fix(chat): translate the live run-status indicator copy

[pedrofrxncx]

Source: bug found while auditing the chat hot-reload/resilience area (apps/web/src/components/chat/) — not tied to a specific issue.

Payoff: RUN_STATUS_COPY in run-status.ts hardcoded the label/detail for all 10 run-status stages ("Sending your message", "Message received", "Waiting to start", ... rendered live in RunStatusIndicator via thinking-indicator.tsx) directly in English, bypassing the i18n layer the rest of the chat UI uses. Every pt-br user watching a run progress saw English text mixed into an otherwise-translated chat surface — this is the same class of hardcoded-string bug as the repo's recurring i18n merge lane (#5099, #5373, #5479, etc).

Fix: moved the 20 strings into i18n/en/chat.ts / i18n/pt-br/chat.ts under chat.runStatus.*, and replaced the static RUN_STATUS_COPY record with getRunStatusCopy(t, stage), a pure helper that takes the TFunction and returns the translated { label, detail } — called from RunStatusIndicator (which already has t = useT()) instead of indexing the old hardcoded map. No behavior change for non-translation logic (advanceRunStatusStage, parseRunStatusStageChunk, etc. are untouched).

Verify:

• cd apps/web && bunx tsc --noEmit (also proves en/pt-br key parity via the satisfies Record<keyof typeof chatEn, string> check on the pt-br dictionary)
• bun test apps/web/src/components/chat/run-status.test.ts — updated to call getRunStatusCopy(translate, stage) instead of indexing the old static map; still asserts the exact copy for waiting-runner / analyzing-scope
• bunx oxlint on all 5 changed files: 0 warnings/errors
• bun run fmt — clean

CI runs the full suite; these are the targeted checks covering this change.

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Summary by cubic

Localized the live run-status indicator by moving hardcoded English strings into i18n and using getRunStatusCopy(t, stage), fixing mixed-language UI for pt-br users with no logic changes.

• Bug Fixes
  • Added chat.runStatus.* keys to i18n/en/chat.ts and i18n/pt-br/chat.ts for all 10 stages (label + detail).
  • Replaced RUN_STATUS_COPY with getRunStatusCopy(t, stage) and updated RunStatusIndicator to use it.
  • Updated tests to call getRunStatusCopy with translate and assert expected copy.

^{Written for commit f290547. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 5 files

_{Re-trigger cubic}