- _query_teacher_classes: fix code -> class_code (Supabase column name), add section_id param - _build_timetable_section: tag class nodes with section_id=timetable - _build_classes_section: tag class nodes with section_id=classes - SubjectClass handler: section=timetable -> taught_lessons for class; section=classes -> enrolled students Co-Authored-By: Claude Sonnet 4.6 <[email protected]>