feat(bisaya): update choice exercise question format and add question number to review

backend/migrations-active/20260824000000-repair-lesson-38-plan-choice.cjs

@@ -0,0 +1,40 @@
+'use strict';
+
+const AMBIGUOUS_QUESTION = 'Erzähle einen Tagesplan mit drei Schritten und einem Wunsch. Welche Bisaya-Formulierung passt am besten?';
+const REPAIRED_QUESTION = 'Wie sagt man auf Bisaya: „Zuerst gehe ich zum Markt.“?';
+
+module.exports = {
+  async up(queryInterface) {
+    await queryInterface.sequelize.transaction(async (transaction) => {
+      // The former free-production prompt has more than one defensible answer,
+      // while its multiple-choice data accepts only the first core pattern.
+      await queryInterface.sequelize.query(`
+        UPDATE community.vocab_grammar_exercise AS exercise
+        SET question_data = JSONB_SET(exercise.question_data, '{question}', TO_JSONB(CAST(:repairedQuestion AS text))),
+            updated_at = NOW()
+        FROM community.vocab_course_lesson AS lesson
+        WHERE exercise.lesson_id = lesson.id
+          AND (lesson.id = 38 OR (lesson.course_id = 1 AND lesson.lesson_number = 38))
+          AND exercise.question_data->>'type' = 'multiple_choice'
+          AND exercise.question_data->>'question' = :ambiguousQuestion;
+      `, {
+        replacements: { ambiguousQuestion: AMBIGUOUS_QUESTION, repairedQuestion: REPAIRED_QUESTION },
+        transaction
+      });
+
+      // This lesson is designed for a 78% target. With six questions, five
+      // correct answers (83%) must therefore pass.
+      await queryInterface.sequelize.query(`
+        UPDATE community.vocab_course_lesson
+        SET target_score_percent = 78,
+            updated_at = NOW()
+        WHERE id = 38
+           OR (course_id = 1 AND lesson_number = 38);
+      `, { transaction });
+    });
+  },
+
+  async down() {
+    // The repair is intentionally not reverted: the old data is ambiguous.
+  }
+};

backend/scripts/create-bisaya-course-content.js

@@ -529,6 +529,14 @@ function buildChoiceExercise(lesson, didactics, pattern, allPatterns, variant =
   const seed = simpleHash(`${lesson.title}:${pattern}:${variant}`);
   const options = rotateArray([pattern, ...distractors], seed % 4);
   const correctAnswer = options.indexOf(pattern);
+  const normalizedPattern = normalizeCorePatternEntry(
+    didactics.corePatterns.find((entry) => corePatternTarget(entry) === pattern)
+  );
+  // A free speaking prompt can have several valid answers. It must never be
+  // used as the question for a single-answer multiple-choice exercise.
+  const question = normalizedPattern?.gloss
+    ? `Wie sagt man auf Bisaya: „${normalizedPattern.gloss}“?`
+    : getChoiceQuestion(lesson, didactics);
 
   return {
     exerciseTypeId: 2,
@@ -536,7 +544,7 @@ function buildChoiceExercise(lesson, didactics, pattern, allPatterns, variant =
     instruction: 'Wähle die natürlichste Formulierung für die Situation oder den Schwerpunkt der Lektion.',
     questionData: {
       type: 'multiple_choice',
-      question: getChoiceQuestion(lesson, didactics),
+      question,
       options
     },
     answerData: {