Refactor lesson types and update review handling

- Changed lesson type from 'review' to 'weekly_review' in multiple lesson definitions across phase 3 and phase 4 extensions.
- Updated the logic in the vocabService to accommodate 'weekly_review' in various methods, ensuring proper handling of weekly review lessons.
- Modified the VocabLessonView component to recognize 'weekly_review' as a valid lesson type for calculations and access checks.
- Enhanced the didactics update script to include 'weekly_review' in the lesson type checks.
- Adjusted the create scripts to reflect the new lesson type for weekly reviews.

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

@@ -806,7 +806,7 @@ function generateExercisesFromDidactics(lesson) {
     if (String(lesson.title || '').toLowerCase().includes('zeitformen')) {
       generated.push(...buildZeitformenDrills(lesson.title));
     }
-  } else if (lesson.lessonType === 'review' || lesson.didacticMode === 'intensive_review') {
+  } else if (lesson.lessonType === 'review' || lesson.lessonType === 'weekly_review' || lesson.didacticMode === 'intensive_review') {
     generated = [
       buildReviewChoiceExercise(lesson, didactics, patternA, lessonPool),
       buildReviewChoiceExercise(lesson, didactics, patternB, lessonPool),
@@ -6188,8 +6188,8 @@ async function createBisayaCourseContent() {
             exerciseNumber,
             title: exercise.title,
             instruction: exercise.instruction,
-            questionData: JSON.stringify(exercise.questionData),
-            answerData: JSON.stringify(exercise.answerData),
+            questionData: exercise.questionData,
+            answerData: exercise.answerData,
             explanation: exercise.explanation,
             createdByUserId: course.ownerUserId || systemUser.id
           };
@@ -6266,8 +6266,8 @@ async function createBisayaCourseContent() {
           exerciseNumber: exerciseNumber++,
           title: exercise.title,
           instruction: exercise.instruction,
-          questionData: JSON.stringify(exercise.questionData),
-          answerData: JSON.stringify(exercise.answerData),
+          questionData: exercise.questionData,
+          answerData: exercise.answerData,
           explanation: exercise.explanation,
           createdByUserId: course.ownerUserId || systemUser.id
         });