Feat: Заявки на курсы (Course Requests) - базовая структура

✅ Миграции: course_requests, course_request_items
✅ Models: CourseRequest, CourseRequestItem
✅ CourseRequestController (CRUD + approve/reject)
✅ CourseRequestPolicy
✅ Маршруты и регистрация Policy
✅ index.blade.php

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

app/Providers/AuthServiceProvider.php

@@ -23,6 +23,7 @@ class AuthServiceProvider extends ServiceProvider
         CourseCategory::class => CourseCategoryPolicy::class,
         Course::class => CoursePolicy::class,
         CourseAssignment::class => CourseAssignmentPolicy::class,
+        CourseRequest::class => CourseRequestPolicy::class,
         Test::class => TestPolicy::class,
         Question::class => QuestionPolicy::class,
         Organization::class => OrganizationPolicy::class,