feat(web): render a plan review as a decision card, not a quiz

The Web composer now renders a request that declares the `plan-review` intent
as its own surface: the waiting-approval card language — amber "Plan review"
strip, the plan as the scrolling markdown body, the question as the card's
accessible name — over one decision row of Chat about it / Refuse / Approve.
Gone from that surface are the 1/1 pager, the numbered radio rows, the custom
answer row, and Skip/Submit, which made approving a plan read as sitting an
exam.

Approve and Refuse answer with the asker's own option labels and keep its
descriptions as tooltips; Chat about it cancels the request so the composer
returns and the user can simply say what they want. Copy is bilingual under the
existing `question` namespace.

The shape choice lives inside the single composer entry rather than a second
chain registration, so the two surfaces cannot race the same carrier, and
`planReviewOf` falls back to the generic flow for any request it cannot render
as a card — the client sits downstream of a wire boundary and every request
must stay answerable.

packages/client/ui-question/README.md

@@ -6,6 +6,8 @@ Web `ask_user_question` feature plugin. Its host half mounts `dsh-tool-ask-user`
 
 The component renders one question at a time with progress navigation, single- and multi-select choices, recommendation badges derived from label suffixes, and custom answers. Question detail reuses the assistant-output `MarkdownText` primitive, including its GFM rendering and untrusted-content policy. The capped card keeps its title, navigation, and submission actions fixed while long detail and choices share an internal scroll region. Single-select choices advance immediately, and Enter submits once every question is answered or skipped; Enter during IME composition confirms the input candidate without advancing. It submits one structured answer batch for the whole request: “Skip this question” retains other drafts and emits the existing blank `{ selected: [] }` shape for that item, while close rejects the whole wait as `ASK_CANCELLED`.
 
+A request whose single question declares a presentation intent renders as that intent's own surface instead. `plan-review` — set by `dsh-plan-mode` on the `exit_plan_mode` review — takes the waiting-approval card shape: a `Plan review` strip, the plan as the scrolling markdown body, the question text as the card's accessible name, and one decision row of `Chat about it` / `Refuse` / `Approve`. Approve and Refuse answer with the asker's own option labels (the intent names which label approves, so the verdict never rides option order) and keep the asker's descriptions as tooltips; `Chat about it` rejects the wait as `ASK_CANCELLED`, returning the composer so the user can say what they want instead. A request that declares no intent, batches more than one question, or fails to offer the named approve label stays on the generic flow — the layout is all an intent changes, never the answer.
+
 Selection state is local to a component keyed by the request rpcId. A replay with the same id preserves a still-mounted draft, while `question/resolved` from the host removes the composer. The host remains authoritative: successful HTTP delivery does not remove pending state locally.
 
 Composer chrome copy (pager, buttons, placeholders, validation feedback) is bilingual: the plugin registers zh/en dictionaries under the `question` namespace of `dsh-client-locale` and hands the entry its bound translator plus the locale snapshot source through the inject face, so a locale switch re-renders a mounted composer. Question and option text arrives from the model and renders verbatim; carrier failure messages also display untranslated.