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* feat(web): add thumbs-up/down feedback widget under completed assistant turns (#1288) Adds a lightweight feedback widget that surfaces under each assistant turn whose run succeeded. Users can submit positive or negative feedback in one click; the negative path opens an optional free-text comment area. The widget never blocks the message composer and only mounts after the run has produced its final artifact, matching the acceptance criteria. What ships - `<MessageFeedback>` (apps/web/src/components/MessageFeedback.tsx) renders the three states: idle (prompt + thumbs), submitted positive (confirmation + Change), submitted negative (confirmation + optional comment textarea + Send + Change). - AssistantMessage.tsx slots the widget under AssistantFooter, gated on `runSucceeded && !hasEmptyResponse`, so failed and empty-response turns don't ask the user to rate something that never finished. - The full record shape leaves room for the future analytics metadata the issue calls out (rating, comment, submittedAt; artifactRef / runId derivable from the surrounding message whenever the analytics pipeline lands). Persistence (v1 = localStorage) Lefarcen's clarifying comment on the issue asked whether v1 should be daemon-persisted or in-memory while the analytics pipeline is defined. The daemon's messages table is column-strict, so daemon persistence would require a SQLite migration plus a contract bump on `ChatMessage`; locking that shape in before the analytics pipeline is designed risks reworking it twice. localStorage is the middle ground: feedback survives reload (so the "feedback state is visually clear after submission" criterion holds across tabs and sessions) without committing the wire shape. The hook surface is just `(value, setter)`, so a future PR can swap the storage layer for a daemon mirror or an analytics shipper without touching the React surface. The store handles corrupted JSON, unknown future rating values, disabled storage (private-mode browsers), and broadcasts changes across listeners in the same tab via a CustomEvent so two mounts of the hook for the same messageId stay in sync. i18n 11 new keys under `feedback.*` (prompt, thumbsUp/Down, two confirmation chips, comment label/placeholder/submit/saved, change). English source values authored alongside the keys; zh-CN translations added in the same pass so the locale alignment test stays green and Chinese users see Chinese strings from day one. The other 16 locales pick up English fallbacks via their existing `...en` spread. Test coverage - `tests/state/message-feedback.test.ts` (8 jsdom cases) — round-trip, null-clear, corrupted JSON, missing rating, unknown rating, key collision across messages. - `tests/components/MessageFeedback.test.tsx` (7 jsdom cases) — idle state, positive submit, negative submit, comment save, blank-comment Send disabled, Change unsticks the rating, rehydration from pre-populated storage. The locale alignment test continues to enforce that every locale declares the new keys (5/5 across 18 locales). Validated - pnpm guard clean - pnpm --filter @open-design/web typecheck clean - tests/i18n/locales.test.ts 5/5 - tests/state/message-feedback.test.ts 8/8 - tests/components/MessageFeedback.test.tsx 7/7 - Full web suite: 98 files, 903 tests * fix(web): tighten feedback widget gate + storage sync + textarea, add styles (PR #1308 review) Addresses every P2/P3 from the codex + Siri-Ray + lefarcen reviews on PR #1308, plus a couple of polish items the review surfaced indirectly. Visibility gate (lefarcen P2) The gate was `runSucceeded && !hasEmptyResponse`, which also matched text-only acknowledgements and question-form replies. The issue scopes feedback to turns that produced a final artifact, so the gate now also requires `produced.length > 0`. New AssistantMessage suite (5 jsdom cases) pins: artifact -> shown, no-artifact -> hidden, streaming -> hidden, failed run -> hidden, empty_response -> hidden. Storage sync (codex P2 + lefarcen P2) The previous broadcast contract was: write storage, dispatch a bare CustomEvent, listeners re-read storage. That had two failure modes: - setItem throwing (private mode / quota / disabled storage) left the listener seeing null and clobbering the in-memory state the user just confirmed. - The clear path early-returned after removeItem and never dispatched, so a second mount of the same messageId stayed in the submitted state when the user clicked Change. New contract: every successful OR failed write dispatches a CustomEvent whose `detail.value` carries the new feedback record (or null). Listeners apply the value directly without re-reading. Same- tab sync survives storage failures and the clear path no longer early-returns. Cross-tab still re-reads on the platform `storage` event since that event has no detail. Two new storage tests pin the new broadcast contract (positive + null) and the failed-setItem path; two new component tests pin in-session confirmation under setItem failure and two-mount Submit + Change synchrony. Textarea draft fix (lefarcen P3) The textarea used `draftComment || feedback.comment || ''` as its controlled value, so erasing a saved comment snapped it back. The draft is now exclusively the source of truth; a ref-backed effect re-seeds the draft from feedback.comment whenever the rating transitions (mount, idle -> negative, cross-mount sync). Send is now enabled when `draftComment !== savedComment`, which lets the user both edit and clear a saved comment. New component test pins erase+ Send actually removing a previously-saved comment. Accessibility The confirmation chip and "Comment saved" tag both gain `role="status"` + `aria-live="polite"` so screen readers announce the state transition. The thumb buttons keep their `aria-label`. CSS (lefarcen P3) The widget's `.message-feedback*` class set had no rules in index.css, so it rendered with default browser controls. Added a ~130-line block that mirrors the surrounding chat pill/chip vocabulary: bg-subtle background, border-pill confirmation chip, accent-tinted positive state and amber-tinted negative state to match the assistant-footer's data-unfinished pattern. Comment area sits below the chip and wraps on narrow widths so the composer isn't pushed off-screen on small panes. Validated - pnpm guard clean - pnpm --filter @open-design/web typecheck clean - tests/state/message-feedback.test.ts 10/10 (was 8, +2 broadcast) - tests/components/MessageFeedback.test.tsx 10/10 (was 7, +3 sync / storage-failure / clear-saved-comment) - tests/components/AssistantMessage.test.tsx 5/5 (new file) - tests/i18n/locales.test.ts 5/5 - Full web suite: 866 tests --------- Co-authored-by: Nagendhra <nagendhra405@gmail.com>