Harden Workboard modal and drawer accessibility.
Summary:
- Add Workboard dialog focus lifecycle handling for initial focus, Tab/Shift+Tab containment, Escape close, and opener restore.
- Mark Workboard background content inert/aria-hidden while modal or drawer dialogs are active.
- Add focused unit and Chromium browser smoke coverage for the audited modal/drawer accessibility requirements.
- Keep UI browser test aliases able to resolve shared workspace packages used by the Workboard view.
Verification:
- node scripts/run-vitest.mjs ui/src/ui/views/workboard.test.ts
- node scripts/run-vitest.mjs ui/src/ui/views/workboard.browser.test.ts
- (cd ui && pnpm exec vitest run --config vitest.config.ts --project browser src/ui/views/workboard.browser.test.ts)
- GitHub checks green at 6557012430
Start the active Control UI chat refresh after Gateway hello without waiting for the slower bootstrap fetch. Keep startup canvas embeds fail-closed until bootstrap config arrives, and recreate preview iframes when sandbox policy changes.
Fix WebChat stream/history reconciliation so visible assistant text survives stale history reloads, tool-history catch-up, and terminal final/error/abort events.\n\nRefactors the UI path into stream reconciliation, stream text, and typed tool-message helpers so persisted history and live stream state use the same matching rules.\n\nCloses #67035.
Fix the Control UI WebChat race where terminal assistant messages could be committed while chatStream was still live, causing history and active stream to render the same reply twice. Terminal final/aborted handling now snapshots fallback text, clears the active run/stream through the lifecycle owner, then appends the visible assistant message.\n\nFixes #71992.\n\nVerification: node scripts/run-vitest.mjs run ui/src/ui/controllers/chat.test.ts ui/src/ui/chat/run-lifecycle.test.ts ui/src/ui/chat/build-chat-items.test.ts; node scripts/run-vitest.mjs run ui/src/ui/app-chat.test.ts ui/src/ui/controllers/sessions.test.ts; node scripts/run-vitest.mjs run --config test/vitest/vitest.ui-e2e.config.ts --configLoader runner ui/src/ui/e2e/chat-flow.e2e.test.ts; Blacksmith Testbox tbx_01kt6a4zn7awkdy12d6b0q2d1q / run 26873514898; autoreview clean; PR CI 121 pass / 10 skipped.
Fixes #87699.\n\nRoutes ACK-completed Control UI chat sends through the existing run lifecycle reconciliation path so stale selected-session rows cannot re-enable the composer/Stop state after the conversation has already completed.\n\nVerification: focused UI/unit tests, Control UI E2E chat-flow test, autoreview clean, Testbox changed gate tbx_01kt68xvz17fcnmd3wj6f7pk6f, and PR CI run 26872484363 green after failed-job rerun for transient runner setup failures.
