style(deps): address linter warnings (#896)

- [x] configure clickable elements to be focusable;

Author: rfprod

libs/client-core-components/src/lib/components/navbar/navbar.component.html

@@ -27,12 +27,13 @@
             [disabled]="button.routeActive()"
             (click)="navButtonClick()"
             (keydown)="navButtonClick()"
+            tabindex="0"
           >
             <mat-icon>{{ button.icon }}</mat-icon> {{ button.title }}
           </a>
         </ng-template>
       }
-      <a mat-menu-item (click)="openNavigator()" (keydown)="openNavigator()"> <mat-icon>explore</mat-icon> Navigator </a>
+      <a mat-menu-item (click)="openNavigator()" (keydown)="openNavigator()" tabindex="0"> <mat-icon>explore</mat-icon> Navigator </a>
     </mat-menu>
   </mat-toolbar>
 }

libs/client-core-components/src/lib/components/navbar/navbar.component.spec.ts

@@ -2,10 +2,10 @@ import { CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
 import { type ComponentFixture, TestBed, type TestModuleMetadata } from '@angular/core/testing';
 import { Router } from '@angular/router';
 import { newTestBedMetadata } from '@app/client-testing-unit';
+import { windowProvider } from '@app/client-util';
 import { of } from 'rxjs';
 import type { MockInstance } from 'vitest';
 
-import { windowProvider } from '@app/client-util';
 import { AppNavbarComponent } from './navbar.component';
 
 describe('AppNavbarComponent', () => {