Give user-question exchanges a dedicated Q&A UI outside tool logs

[mia-riezebos]

Problem

I use the user-question tool during planning conversations. Later, I need to reread the questions alongside my answers.
The history already retains them, but getting to a past exchange is not user friendly.

In the attached example, I have to:

1. Expand the completed turn's "Worked for..." row.
2. Expand its tool-activity group.
3. Scroll through unrelated tool calls to find the question, then expand that question's row.

That is three clicks, often with scrolling in between, just to reread a question and my answer.
These exchanges contain project decisions. They should be easy to revisit in the conversation.

Proposed behavior

Give user-question exchanges a dedicated Q&A card in the conversation timeline.

• Pair each question with its submitted answer, clearly distinguishing the agent's question from my response.
• Keep multiple questions from one request together, in their original order.
• Show selected answers with their full option text. Preserve custom replies verbatim.
• Let me expand the card to read the full questions and available choices, with Markdown rendered.
• Keep answered cards accessible after the agent continues, after reload, and when reopening the thread.

Keep these cards visible outside collapsed turn/tool/work logs. A compact answered summary is fine if the full exchange opens in one click.
I should not need to expand unrelated tool activity or search through command output to find a question.
Use the same presentation for supported question tools across providers, including AskUserQuestion and request_user_input_async.

Screenshots

Completed turn. The question is hidden:

First click. The turn is expanded, but the question is still hidden:

Second click. The tool group is expanded. The question is among many unrelated tool calls:

Third click, after scrolling. The full question and answer are finally readable:

Related work

• fix(chat): fold question answers into tool activity #11014 added question/answer details to expandable tool rows. This request asks for dedicated conversation cards that remain easy to revisit.
• feat(web): render AskUserQuestion exchanges as a stylized Q&A list #5867 previously proposed dedicated Q&A cards and was closed without merging.

[mia-riezebos]

Note

claude-opus-5.5 commenting on behalf of Mia.

I have a working version of this and would like a maintainer's go-ahead on the direction before I open a PR, per CONTRIBUTING.

What it does

• An answered question set becomes its own card in the timeline. It stays visible when the turn folds into "Worked for…" and splits tool groups instead of hiding inside them.
• Each question shows its text with the answer under it. A picked option shows its number in the list, such as "2. Private". A custom reply shows verbatim.
• Clicking a question, or its chevron, opens that question's full option list with the pick checked.
• Dismissed, interrupted, or failed question sets get the same card, marked "Dismissed" or "Not answered".
• Pending questions are unchanged. The composer still owns them, so the card cannot disagree with it, which was the concern that closed feat(web): render AskUserQuestion exchanges as a stylized Q&A list #5867.

It's client-only: no contract or server changes. The card reads the user_input_request turn item's questions and questionAnswer, which every provider adapter already fills in. This covers web and desktop. Mobile keeps its current rows for now.

Before

The settled turn shows only "Worked for 16s":

The exchange appears only after expanding the fold and then the question row:

After

The same exchange as a card in place:

Q1 opened to show its options:

A dismissed question set:

Would you take a PR in this shape?