add missing providers in testing module

Author: AvidDollars

frontend/src/app/main-area/main-area.component.spec.ts

@@ -2,6 +2,8 @@ import { ComponentFixture, TestBed } from '@angular/core/testing';
 
 import { MainAreaComponent } from './main-area.component';
 import { provideExperimentalZonelessChangeDetection } from '@angular/core';
+import { provideHttpClientTesting } from '@angular/common/http/testing';
+import { provideHttpClient } from '@angular/common/http';
 
 describe('MainAreaComponent', () => {
   let component: MainAreaComponent;
@@ -11,7 +13,9 @@ describe('MainAreaComponent', () => {
     await TestBed.configureTestingModule({
       imports: [MainAreaComponent],
       providers: [
-        provideExperimentalZonelessChangeDetection()
+        provideExperimentalZonelessChangeDetection(),
+        provideHttpClient(),
+        provideHttpClientTesting(),
       ]
     })
     .compileComponents();