fix(web): show the agent's question on user-input timeline rows

[saphid]

What Changed

When an agent asks the user a question (AskUserQuestion-style prompts), the timeline row for that exchange now leads with the question text and shows the chosen answer next to it, instead of a generic "User input submitted" label that hid what had been asked. The full question-and-answer history is still available by expanding the row, unchanged.

Scope: web client timeline rendering only. Mobile rendering, the server's activity pipeline, wire contracts, and the pending-question composer flow are untouched.

Why

An answered question currently renders as a row labeled "User input submitted" with only the answer as trailing preview text. The question itself is invisible unless you expand the row, so scrolling back through a thread you see answers floating without their questions, and there is no visual cue that this row is a question-and-answer exchange. Since the folded row already carries questionTextById, the smallest correct fix is presentation: use the question text as the row heading and keep the answer as the trailing preview. No schema, fold, or expansion behavior changes.

Verification

• pnpm tc: passed (0 errors).
• vp test run src/components/chat/MessagesTimeline.test.tsx in apps/web: 68 passed, 0 failed. Includes an updated test that now asserts the question text is visible in the collapsed row, and a new test that an unanswered question row leads with the question text exactly once.
• New vp test run src/work-log/userInput.test.ts in packages/client-runtime: 3 passed, 0 failed, covering the new getQuestionTextPreview helper (joining, whitespace normalization, empty case).
• vp test run src/components/chat/MessagesTimeline.logic.test.ts in apps/web (120 passed) and vp test run src/work-log/presentation.test.ts in packages/client-runtime (73 passed) as adjacent regression checks.
• Live check in a running web client: a seeded thread with a resolved user-input request rendered the row as "Which approach should the migration take?" with the answer beneath it before and after the change (see images). Verified via DOM text assertions on the rendered timeline in a controlled browser.

UI Changes

Before — the row shows only the generic label and the answer; the question is nowhere in the transcript:

After — the row leads with the question and shows the answer beside it:

Full-window captures of the same states: before · after

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

Implementation used GLM (enablers/xlarge) in T3 Code via the OpenCode harness.

[macroscopeapp]

Approvability

Verdict: Approved at 0047fac

Macroscope's review found this PR approvable — This is a small, self-contained web presentation fix that surfaces existing question text without changing contracts, processing, or expanded history. The live-row layout concern is addressed in the current head with shrinkable, truncated heading and answer spans.

Notes:

• This verdict was updated automatically after the outstanding correctness findings were resolved. Macroscope did not re-review the code.

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ℹ️ Recent review info

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📒 Files selected for processing (1)

• apps/web/src/components/chat/MessagesTimeline.tsx

🚧 Files skipped from review as they are similar to previous changes (1)

• apps/web/src/components/chat/MessagesTimeline.tsx

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📝 Walkthrough

Walkthrough

The change adds a question-text preview helper and uses it in live and expanded timeline rows. Answer previews now appear only when an answer exists. Tests cover normalization, unanswered questions, attachment-only history, and expansion behavior.

Changes

Question preview labeling

Layer / File(s)	Summary
Question preview formatting packages/client-runtime/src/work-log/userInput.ts, packages/client-runtime/src/work-log/userInput.test.ts	Adds getQuestionTextPreview, which normalizes question text, skips blank values, and joins remaining values with " · ".
Timeline question labels apps/web/src/components/chat/MessagesTimeline.tsx, apps/web/src/components/chat/MessagesTimeline.test.tsx	Live and expanded rows use question text when available. Answer previews render only for answered entries. Layout spans truncate long question text while preserving answer previews. Tests cover collapsed and expanded unanswered and attachment-only questions.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 4 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely describes the main change: showing the agent's question on user-input timeline rows.
Description check	✅ Passed	The description includes complete What Changed, Why, UI Changes, verification, and Checklist sections. It explains the scope, rationale, tests, and visual impact.

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Inline comments:
In `@apps/web/src/components/chat/MessagesTimeline.tsx`:
- Around line 3252-3269: Update the question-heading spans in both the live row
and expanded-history row to use a bounded, shrinkable layout instead of shrink-0
when an answer preview is present, preserving truncation for the preview so both
heading and answer remain visible within the available width.

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📥 Commits

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📒 Files selected for processing (4)

• apps/web/src/components/chat/MessagesTimeline.test.tsx
• apps/web/src/components/chat/MessagesTimeline.tsx
• packages/client-runtime/src/work-log/userInput.test.ts
• packages/client-runtime/src/work-log/userInput.ts

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[saphid]

Both bot findings (long question headings pushing the answer preview out of view in the live and settled rows) are addressed in 0047fac: the heading spans now shrink and truncate (min-w-0 truncate) instead of shrink-0, in both the live row and the settled row. Focused tests and typecheck re-run green on that head.