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/clients/client-stepper/client-general-step/client-general-step.component.ts

@@ -1,5 +1,5 @@
 /** Angular Imports */
-import { Component, OnInit, Input, Output, EventEmitter } from '@angular/core';
+import { Component, OnInit, Input, Output, EventEmitter, inject } from '@angular/core';
 import {
   UntypedFormBuilder,
   UntypedFormGroup,
@@ -37,6 +37,11 @@ import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
   ]
 })
 export class ClientGeneralStepComponent implements OnInit {
+  private formBuilder = inject(UntypedFormBuilder);
+  private dateUtils = inject(Dates);
+  private settingsService = inject(SettingsService);
+  private clientService = inject(ClientsService);
+
   @Output() legalFormChangeEvent = new EventEmitter<{ legalForm: number }>();
 
   /** Minimum date allowed. */
@@ -74,12 +79,7 @@ export class ClientGeneralStepComponent implements OnInit {
    * @param {SettingsService} settingsService Setting service
    * @param {ClientsService} clientService Client service
    */
-  constructor(
-    private formBuilder: UntypedFormBuilder,
-    private dateUtils: Dates,
-    private settingsService: SettingsService,
-    private clientService: ClientsService
-  ) {
+  constructor() {
     this.setClientForm();
   }
 
@@ -152,14 +152,16 @@ export class ClientGeneralStepComponent implements OnInit {
           'firstname',
           new UntypedFormControl('', [
             Validators.required,
-            Validators.pattern('(^[A-z]).*')])
+            Validators.pattern('(^[A-z]).*')
+          ])
         );
         this.createClientForm.addControl('middlename', new UntypedFormControl('', Validators.pattern('(^[A-z]).*')));
         this.createClientForm.addControl(
           'lastname',
           new UntypedFormControl('', [
             Validators.required,
-            Validators.pattern('(^[A-z]).*')])
+            Validators.pattern('(^[A-z]).*')
+          ])
         );
       } else {
         this.createClientForm.removeControl('firstname');
@@ -169,7 +171,8 @@ export class ClientGeneralStepComponent implements OnInit {
           'fullname',
           new UntypedFormControl('', [
             Validators.required,
-            Validators.pattern('(^[A-z]).*')])
+            Validators.pattern('(^[A-z]).*')
+          ])
         );
         this.createClientForm.addControl(
           'clientNonPersonDetails',