add new changes

frontend/src/app/core/services/admin.service.ts

@@ -747,6 +747,46 @@ export class AdminService {
     );
   }
 
+  /**
+   * Get all questions with pagination, search, and filtering
+   * Endpoint: GET /api/admin/questions
+   */
+  getAllQuestions(params: {
+    page?: number;
+    limit?: number;
+    search?: string;
+    category?: string;
+    difficulty?: string;
+    sortBy?: string;
+    order?: string;
+  }): Observable<{
+    success: boolean;
+    count: number;
+    total: number;
+    page: number;
+    totalPages: number;
+    limit: number;
+    filters: any;
+    data: Question[];
+    message: string;
+  }> {
+    let queryParams: any = {};
+
+    if (params.page) queryParams.page = params.page;
+    if (params.limit) queryParams.limit = params.limit;
+    if (params.search) queryParams.search = params.search;
+    if (params.category && params.category !== 'all') queryParams.category = params.category;
+    if (params.difficulty && params.difficulty !== 'all') queryParams.difficulty = params.difficulty;
+    if (params.sortBy) queryParams.sortBy = params.sortBy;
+    if (params.order) queryParams.order = params.order.toUpperCase();
+
+    return this.http.get<any>(`${this.apiUrl}/questions`, { params: queryParams }).pipe(
+      catchError((error: HttpErrorResponse) => this.handleQuestionError(error, 'Failed to load questions'))
+    );
+  }
+
+ 
+
   /**
    * Delete question (soft delete)
    */