Upgrading to Angular 20:

Replaced checked in package-lock.json by regenerated one.
Ran ng update @angular/core@20 @angular/cli@20
Ran npm install @angular-builders/jest@^20.0.0 @fortawesome/angular-fontawesome@^3.0.0 @swimlane/ngx-graph@^11
Ran npm install ngx-mat-select-search@^8.0.2.
Ran ng update @angular/material@20.
Updated all eslint and typescript to the latest versions.
Removed @angular-devkit/schematics.
Updated fontawesome.
Updated rxjs and tslib.
Moved required node version from 16 to 20.
Updated jest-preset-angular.
Set preserveWhitespaces to false.
Corrected two type declarations in two typescript files to make ng serve run without errors.
Removed unused angular-devkit/schematics from view-user.component.ts .
Updated list of supported browsers.
Upgraded prettier.
Ran prettier . --write the first time.
Ran prettier . --write the second time.
Ran ng generate @angular/core:inject with defaults, excepted a handful of files.
Fixed remaining eslint problems.
Added dist directory to ignores in eslint.config.js.
Let prettier fix formatting, almost everything is just line breaks.
Made htmlhint ignore @if and @for Angular constructs.
Updated node version in Github workflow to 22.12.0 (build.yml).
Updated .env.ts.
Updated Angular datetime format strings from YYYY-MM-DD to yyyy-MM-dd.
Merged changes from dev into angular20 branch.

src/app/shared/language-selector/language-selector.component.ts

@@ -1,5 +1,5 @@
 /** Angular Imports */
-import { Component } from '@angular/core';
+import { Component, inject } from '@angular/core';
 import { UntypedFormControl, ReactiveFormsModule } from '@angular/forms';
 
 /** Custom Services */
@@ -22,6 +22,9 @@ import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
   ]
 })
 export class LanguageSelectorComponent {
+  private translateService = inject(TranslateService);
+  private settingsService = inject(SettingsService);
+
   /** Language selector form control. */
   languageSelector = new UntypedFormControl();
 
@@ -29,10 +32,7 @@ export class LanguageSelectorComponent {
    * Sets the language of the application in the selector on initial setup.
    * @param {TranslateService} translateService Translate Service.
    */
-  constructor(
-    private translateService: TranslateService,
-    private settingsService: SettingsService
-  ) {
+  constructor() {
     this.languageSelector.setValue(this.currentLanguage);
   }