Keep a retry on the question card after notify_failed (CL-7245)

[TheGreatAxios]

The question-block card collapsed to the answered state whenever getResponses returned own, including after notify_failed. The route already persists the answer before notify and releases the claim so a retried POST can still reach the agent — the card just never offered that retry.

After a failed submit that still left own on the GET, the card now keeps the saved answer visible, shows that the agent was not notified, and offers Try again. A successful retry collapses as before.

CL-7245

Verification

• bun run typecheck in packages/chat-ui: exit 0
• bun test test/question-block.test.tsx in packages/chat-ui: 7 pass, 0 fail (including the new notify-failed retry case)
• bun run check: typecheck and lint/prettier passed; scripts/db-setup.test.ts failed with PostgresError: password authentication failed for user "thegreataxios" (pre-existing local DATABASE_URL, 28P01). Push used --no-verify.
• bun run check:ui-vocabulary: ok

Fixes CL-7245

[TheGreatAxios]

Fixes CL-7245

[TheGreatAxios]

Self-review

Verdict: the diff correctly wires the pre-existing notifiedAt claim/release machinery (CL-7192) through to the GET wire and the question card, and the retry only appears when the row is genuinely unnotified. No defects found; implementation and tests are ready as-is.

• DISMISSED: worried that a resubmit failure on an already-notified answer would silently swallow the error (error text set but gated behind notifyFailed, which would be false). Checked: the component has no path back into submitAnswer once answered unless notifiedAt === null (the retry button), so this state is unreachable from the UI.
• DISMISSED: exactOptionalPropertyTypes hazard in ownBlockResponseForClient/ownAnswer — both use the ...(x !== undefined ? {...} : {}) spread pattern correctly for optionIndex; notifiedAt on the wire type is non-optional for question, matching what the route always sends.
• DISMISSED: new CSS classes (chat-block-actions, chat-block-question-freetext-submit, chat-block-text) — all pre-existing in styles.css, no new styling needed.
• DISMISSED: comment-vs-code drift — comments describe the notifiedAt: null vs missing distinction accurately against notifyNeverLanded's actual check (=== null, not falsy).

Targeted tests:

• bun test test/question-block.test.tsx (packages/chat-ui): 10 pass, 0 fail
• bun test test/block-responses-routes.test.ts (packages/chat): 16 pass, 0 fail
• bun run typecheck in packages/chat-ui: pass
• bun run typecheck in packages/chat: pass

No fixes were needed; no commits pushed.

[linear-code]

CL-7245