question dismissal, A2: the silent write + the dismissal pause (owner design 2026-10-03)

- {type:"dismiss"} input event: parse + pure appends with the answer-event
  orphan discipline (dangling-call 400, kind match, answer must be dismissed)
- POST /api/chats/[id]/dismiss: the no-turn composition — write-ahead append,
  409 while a turn runs, emits record-changed (new bus word; idle views sync)
- needsContinuation: an all-dismissed trailing batch demands nothing;
  endsInDismissal = the derived pause predicate (tail-based, no latch)
- wake pipeline: while the record ends in a dismissal the pump holds every
  delivery in the steer queue — the user's next send is the wake (until the
  text-turn steer claim lands, settlement re-pump delivers right after it)
- session-core.dismissQuestion: optimistic skipped card + silent POST;
  chat.tsx confirmAbort question-mode swaps submitAnswer for it; ESC-abort
  popup everywhere (AbortTurnDialog) with popup-Esc claimed via state gate
- parallel question calls dismiss call-by-call (results bind by id)

components/session.ts

@@ -93,6 +93,10 @@ export function useChatSession({ chatId, initialMessages, initiallyInFlight }: U
 			void model.submitAnswer(tool, toolCallId, output),
 		[model],
 	);
+	const dismissQuestion = useCallback(
+		(toolCallId: string, answer: QuestionAnswerData) => void model.dismissQuestion(toolCallId, answer),
+		[model],
+	);
 	const setMessages = useCallback((record: LhMessage[]) => model.setMessages(record), [model]);
 	const adoptRecord = useCallback((record: LhMessage[]) => model.adoptRecord(record), [model]);
 	const stop = useCallback(() => model.stop(), [model]);
@@ -106,6 +110,7 @@ export function useChatSession({ chatId, initialMessages, initiallyInFlight }: U
 		error: state.error,
 		send,
 		submitAnswer,
+		dismissQuestion,
 		setMessages,
 		adoptRecord,
 		stop,