update

routes/subjectRoutes.js

@@ -33,4 +33,11 @@ router.put('/:id', subjectController.updateSubject);
 // DELETE /api/subjects/:id - Delete subject
 router.delete('/:id', subjectController.deleteSubject);
 
+// ============ Nested Chapter Routes ============
+// POST /api/subjects/:subjectId/chapters - Add chapter to subject
+router.post('/:subjectId/chapters', subjectController.addChapterToSubject);
+
+// DELETE /api/subjects/:subjectId/chapters/:chapterId - Remove chapter from subject
+router.delete('/:subjectId/chapters/:chapterId', subjectController.removeChapterFromSubject);
+
 module.exports = router;