feat: enhance class access logic for directors in my_classes endpoint

backend/routes/api.py

@@ -427,14 +427,17 @@ def me():
 @api_bp.route('/my/classes', methods=['GET'])
 @login_required
 def my_classes():
-    """Geeft alle klassen van de school en de eigen klassen van de leerkracht."""
+    """Geeft alle klassen van de school en de eigen klassen van de leerkracht.
+    Directeurs en hoger zien automatisch alle klassen als my_classes."""
     if not current_user.school_id:
         return jsonify({'all_classes': [], 'my_classes': []})
     all_cls = Class.query.filter_by(school_id=current_user.school_id)\
                          .order_by(Class.name).all()
+    # Directeurs en hoger hebben toegang tot alle klassen zonder expliciete koppeling
+    my_cls = all_cls if current_user.is_director else current_user.classes
     return jsonify({
         'all_classes': [{'id': c.id, 'name': c.name} for c in all_cls],
-        'my_classes':  [{'id': c.id, 'name': c.name} for c in current_user.classes],
+        'my_classes':  [{'id': c.id, 'name': c.name} for c in my_cls],
     })