quick-fixes round: quiz-only teach-check reveal, ESC-abort confirm popup + question dismissal, confidence prompt diet

- requiresReveal gates on pending.tool === 'quiz' (owner: only graded quizzes
  arrive collapsed; ask/explain always open)
- ESC-abort chain opens AbortTurnDialog everywhere (owner ruling); from a
  pending question abort IS dismissal — dismissedAnswer rides the answer
  path, the teacher acknowledges the skip in its next turn; popup-Esc is
  claimed via the state gate (two window listeners fire per Esc)
- 25-confidence.md: stripped the slider/JSON/calibration mechanics — pure
  reading doctrine remains
- toolQuestionKind named once in core (dock parity), dock switched to it

components/question-dock.tsx

@@ -16,6 +16,7 @@ import {
 	resolveCorrect,
 	seededRandom,
 	shuffleOptions,
+	toolQuestionKind,
 	parseAskInput,
 	parseQuizInput,
 	parseExplainInput,
@@ -208,7 +209,7 @@ function QuestionDockForm({
 	onSubmit,
 	onEscape,
 }: Omit<QuestionDockProps, "expanded" | "onExpand" | "reveal">) {
-	const kind = toolName === "quiz" ? ("quiz" as const) : toolName === "explain" ? ("explain" as const) : ("ask" as const);
+	const kind = toolQuestionKind(toolName);
 
 	// Canonical QuestionData, built once per question. Quiz options are
 	// deterministically shuffled (seeded by toolCallId) so position never leaks