[karaaslanz]

Summary

Prevents stale AI Work responses from overwriting newer user edits in the active document.

When a Work request starts, the frontend now snapshots both the active document identity and its content. Before applying the returned modified_content, it verifies that the user is still on the same document and that the document content has not changed. If either changed while the request was in flight, the stale result is rejected and the user is asked to re-run the task against the current document.

Changes

• Pass the active tab/document ID into useAIActions.
• Keep the latest active document snapshot available while an async Work request is in flight.
• Add a small shared freshness guard used by the production Work path.
• Reject stale results when either:
  • the same document was edited while the request was running, or
  • the user switched to another document before the response returned.
• Preserve the existing apply behavior when the original document is unchanged.
• Add focused regression coverage for all three paths.

Validation

Exact-head upstream CI on 8f10762:

Frontend tests: 26 passed, 0 failed

Frontend lint: passed

Frontend production build / TypeScript: passed

Backend tests: 195 passed, 0 failed

Ruff check / format check: passed

CI also reports existing environment/dependency warnings (Node/action deprecation, npm dependency audit output, build-cache warning, and an ffmpeg availability warning); none are introduced by this change.
Closes #298.

Refs #274, #280.

[petertzy]

Reviewed against issue #298. The Work request captures the document ID and content, checks the latest snapshot before applying the response, and rejects stale results with a clear retry message. Unchanged documents retain the existing apply behavior.

Regression coverage includes unchanged content, edits during a request, and switching documents. The change stays within the current-document Work flow.

Latest main was merged without conflicts in f1c910e. Validation passed: 26 frontend tests, frontend lint, production build/TypeScript, and 206 backend tests with 13 subtests.

No blocking issues found. Approved for merge.