chore: upgrade to Angular v20 + deps

[DavideViolante]

No description provided.

[Copilot]

Pull Request Overview

Upgrades the Angular application to version 20 and aligns all dependencies and build configurations accordingly.

• Bumps Angular core and related package versions in package.json
• Switches builder definitions in angular.json to the new @angular/build targets
• Converts constructor-based DI to standalone inject() calls and applies new @if/@for template directives

Reviewed Changes

Copilot reviewed 23 out of 24 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
package.json	Updated Angular and other dependency versions
angular.json	Replaced @angular-devkit/build-angular builders with @angular/build
client/app/shared/toast/toast.component.html	Converted *ngIf to @if control flow directive
client/app/shared/loading/loading.component.html	Converted *ngIf to @if control flow directive
client/app/services/user.service.ts	Switched from constructor DI to inject(HttpClient)
client/app/services/cat.service.ts	Switched from constructor DI to inject(HttpClient)
client/app/services/auth.service.ts	Switched from constructor DI to multiple inject() calls
client/app/services/auth-guard-login.service.ts	Switched from constructor DI to inject(AuthService)
client/app/services/auth-guard-admin.service.ts	Switched from constructor DI to inject(AuthService)
client/app/register/register.component.ts	Switched from constructor DI to multiple inject() calls
client/app/register/register.component.html	Added autocomplete attributes on form inputs
client/app/logout/logout.component.ts	Switched from constructor DI to inject(AuthService)
client/app/login/login.component.ts	Switched from constructor DI to multiple inject() calls
client/app/login/login.component.html	Added autocomplete attributes on form inputs
client/app/cats/cats.component.ts	Switched from constructor DI to multiple inject() calls
client/app/cats/cats.component.html	Converted *ngIf/*ngFor to @if/@for directives
client/app/app.component.ts	Switched from constructor DI to inject() calls
client/app/app.component.html	Converted *ngIf to @if control flow directive
client/app/admin/admin.component.ts	Switched from constructor DI to multiple inject() calls
client/app/admin/admin.component.html	Converted *ngIf/*ngFor to @if/@for directives
client/app/add-cat-form/add-cat-form.component.ts	Switched from constructor DI to multiple inject() calls
client/app/account/account.component.ts	Switched from constructor DI to multiple inject() calls
client/app/account/account.component.html	Converted *ngIf to @if control flow directive

Comments suppressed due to low confidence (6)

client/app/services/auth.service.ts:12

• UserService is injected here but not imported; add import { UserService } from './user.service'; at the top of the file.

  private userService = inject(UserService);

client/app/services/auth.service.ts:15

• ToastComponent is injected here but not imported; add import { ToastComponent } from '../shared/toast/toast.component'; at the top of the file.

  toast = inject(ToastComponent);

client/app/register/register.component.ts:17

• UserService is injected here but not imported; add import { UserService } from '../services/user.service'; at the top of the file.

  private userService = inject(UserService);

client/app/login/login.component.ts:14

• AuthService is injected here but not imported; add import { AuthService } from '../services/auth.service'; at the top of the file.

  private auth = inject(AuthService);

client/app/admin/admin.component.ts:16

• UserService is injected here but not imported; add import { UserService } from '../services/user.service'; at the top of the file.

  private userService = inject(UserService);

client/app/login/login.component.html:19

• [nitpick] Use autocomplete="current-password" on login password fields to improve browser autofill behavior and accessibility.

               formControlName="password" placeholder="Password" autocomplete="password">