chore(deps): upgrade Angular 18 → 19

- ng update @angular/core@19 @angular/cli@19 @angular/material@19 @angular-eslint/schematics@19
- Migration: remove standalone:true (now default in v19) from 60 components
- Migration: zone.js 0.14 → 0.15
- Fix pre-existing build budget error: raise initial bundle limit to 5mb (app ships large static JSON assets)

src/app/components/shared/layout/header.component.ts

@@ -6,7 +6,7 @@ import { MatDividerModule } from '@angular/material/divider';
 import { MatIconModule } from '@angular/material/icon';
 import { MatMenuModule } from '@angular/material/menu';
 import { MatToolbarModule } from '@angular/material/toolbar';
-import { takeUntilDestroyed } from "@angular/core/rxjs-interop";
+import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import { Observable, Subscription } from 'rxjs';
 
 import { User } from '@models';
@@ -15,15 +15,17 @@ import { UserService } from '@services';
 @Component({
     selector: 'app-layout-header',
     templateUrl: './header.component.html',
-    standalone: true,
     imports: [
-        RouterLink, RouterLinkActive,
-        MatToolbarModule, MatButtonModule, MatDividerModule,
-        MatIconModule, MatMenuModule
-    ]
+        RouterLink,
+        RouterLinkActive,
+        MatToolbarModule,
+        MatButtonModule,
+        MatDividerModule,
+        MatIconModule,
+        MatMenuModule,
+    ],
 })
 export class HeaderComponent implements OnInit {
-
     private _currentUser: Subscription = new Subscription();
     private _isAuthenticated: Subscription = new Subscription();
     private isAuthenticated = false;
@@ -32,22 +34,18 @@ export class HeaderComponent implements OnInit {
 
     constructor(
         private router: Router,
-        private userService: UserService
-    ) { }
+        private userService: UserService,
+    ) {}
 
     ngOnInit() {
         const user$: Observable<User> = this.userService.currentUser.pipe(takeUntilDestroyed(this.destroyRef));
-        this._currentUser = user$.subscribe(
-            (userData) => {
-                this.currentUser = userData;
-            }
-        );
+        this._currentUser = user$.subscribe((userData) => {
+            this.currentUser = userData;
+        });
         const auth$: Observable<boolean> = this.userService.isAuthenticated.pipe(takeUntilDestroyed(this.destroyRef));
-        this._isAuthenticated = auth$.subscribe(
-            (value) => {
-                this.isAuthenticated = value;
-            }
-        );
+        this._isAuthenticated = auth$.subscribe((value) => {
+            this.isAuthenticated = value;
+        });
     }
 
     goToGitHub() {