frontend/src/app/app.component.ts

import { Component, Renderer2 } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {
  title = 'flotte-frontend';
  
  constructor(private renderer: Renderer2) {
    this.renderer.addClass(document.body, 'mat-app-background');
    this.renderer.addClass(document.body, 'dark-theme');
  }
  
}