Merge pull request #3156 from codecrafters-io/refactor-simplify-active-repository-getter

refactor(course-overview): simplify activeRepository getter

Author: rohitpaulk

app/controllers/course-overview.ts

@@ -10,18 +10,7 @@ export default class CourseOverviewController extends Controller {
   @service declare authenticator: AuthenticatorService;
 
   get activeRepository(): RepositoryModel | null {
-    if (this.authenticator.currentUser) {
-      return (
-        this.authenticator.currentUser.repositories
-          .filterBy('course', this.model.course)
-          .filterBy('firstSubmissionCreated')
-          .sortBy('lastSubmissionAt')
-          .toArray()
-          .reverse()[0] || null
-      );
-    } else {
-      return null;
-    }
+    return this.userRepositories.sortBy('lastSubmissionAt').toArray().reverse()[0] || null;
   }
 
   get completedStages() {