feat(auth): add Casbin RBAC and user activity tracking

Integrate Casbin for role-based access control with admin routes for role management. Add user activity logging service to track login and refresh events. Refactor audit service to use AI-based content moderation.

internal/wire/service.go

@@ -41,6 +41,8 @@ var ServiceSet = wire.NewSet(
 	ProvideScheduleSyncService,
 	ProvideGroupService,
 	ProvideUploadService,
+	ProvideUserActivityService,
+	ProvideRoleService,
 )
 
 // ProvideJWTService 提供 JWT 服务
@@ -199,3 +201,16 @@ func ProvideUploadService(
 ) *service.UploadService {
 	return service.NewUploadService(s3Client, userService)
 }
+
+// ProvideUserActivityService 提供用户活跃统计服务
+func ProvideUserActivityService(repo *repository.UserActivityRepository) service.UserActivityService {
+	return service.NewUserActivityService(repo)
+}
+
+// ProvideRoleService 提供角色管理服务
+func ProvideRoleService(
+	roleRepo repository.RoleRepository,
+	casbinSvc service.CasbinService,
+) service.RoleService {
+	return service.NewRoleService(roleRepo, casbinSvc)
+}