Add a module delete API route and handler so level/module removal actions remove modules directly instead of only deleting sub-modules.
Made-with: Cursor
Introduce a compatibility delete route and handler for course sub-categories and cascade-delete their linked courses to support admin content cleanup flows.
Made-with: Cursor
Allow course creation payloads to include sub_category_id and persist it so newly created language paths appear in unified hierarchy views.
Made-with: Cursor
Expose /course-management/human-language/hierarchy as an alias to the unified hierarchy handler so older admin clients continue working without 404s.
Made-with: Cursor
Handle missing course_sub_categories table by serving hierarchy data from legacy categories/courses queries so content pages keep loading until unified hierarchy migration is applied.
Made-with: Cursor
Enhance hierarchy parsing to group Module-N and Module-N.M naming into stable module/sub-module structures under each CEFR level for consistent rendering.
Made-with: Cursor
Expose a dedicated human-language hierarchy endpoint aligned to category/subcategory/course/level/module/sub-module structure and add a complete learner mobile integration guide.
Made-with: Cursor
Introduce separate CEFR-based human language lesson APIs for create, update, and level-filtered retrieval while keeping existing non-language course hierarchy endpoints unchanged.
Made-with: Cursor
