Enhance audience management features with new components and API integrations

- Added `AssignCoursesModal`, `AudienceMemberRow`, `AudienceTable`, and related components for improved audience management UI.
- Implemented audience invite actions including resend and revoke functionality.
- Updated audience API to support importing members and assigning courses.
- Refactored audience data handling to include status and invite management.
- Improved overall user experience with pagination and selection features in the audience table.

apps/dashboard/src/lib/features/course/api/courses.svelte.ts

@@ -8,6 +8,8 @@ import type {
   UserEnrolledCourses
 } from '$features/course/types';
 
+import { SvelteSet } from 'svelte/reactivity';
+
 /**
  * API class for course operations
  */
@@ -16,12 +18,19 @@ export class CoursesApi extends BaseApiWithErrors {
   enrolledCourses = $state<UserEnrolledCourses>([]);
   recommendedCourses = $state<RecommendedCourses>([]);
 
+  /** Keeps list UIs in sync after a course is deleted (server data is updated separately on navigation). */
+  removeCourseFromLists(courseId: string) {
+    this.orgCourses = this.orgCourses.filter((c) => c.id !== courseId);
+    this.enrolledCourses = this.enrolledCourses.filter((c) => c.id !== courseId);
+    this.recommendedCourses = this.recommendedCourses.filter((c) => c.id !== courseId);
+  }
+
   /**
    * Fetches org courses for the current organization
    * Org ID is automatically added from currentOrg store
    */
   async getOrgCourses(tagSlugs: string[] = []) {
-    const normalizedTagSlugs = Array.from(new Set(tagSlugs.map((tag) => tag.trim()).filter(Boolean)));
+    const normalizedTagSlugs = Array.from(new SvelteSet(tagSlugs.map((tag) => tag.trim()).filter(Boolean)));
 
     return this.execute<GetOrgCoursesRequest>({
       requestFn: () =>
@@ -32,7 +41,7 @@ export class CoursesApi extends BaseApiWithErrors {
                   tags: normalizedTagSlugs.join(',')
                 }
               }
-            : {}
+            : { query: {} }
         ),
       logContext: 'fetching org courses',
       onSuccess: (response) => {