feat: Update sidebar navigation and add dashboard component

- Changed display name for the main dashboard in sidebar from 'Dashboards' to 'Hlavná stránka'.
- Removed commented-out children routes for dashboards and frontend pages in sidebar.
- Added new dashboard component and its routing.
- Introduced logout functionality with a dedicated logout component.
- Updated authentication routes to include logout path.
- Modified callback component to navigate to the dashboard upon successful login.
- Enhanced authentication service to handle user profile loading more effectively.

Web/src/app/pages/authentication/callback/callback.component.ts

@@ -1,5 +1,5 @@
 import { Component } from '@angular/core';
-import { RouterModule } from '@angular/router';
+import { Router, RouterModule } from '@angular/router';
 import { CoreService } from '../../../services/core.service';
 import { MaterialModule } from '../../../material.module';
 import { BrandingComponent } from '../../../layouts/full/vertical/sidebar/branding.component';
@@ -15,7 +15,7 @@ export class CallbackComponent {
   options: any;
   profile: any;
 
-  constructor(private settings: CoreService, private as: AuthenticationService) {
+  constructor(private settings: CoreService, private as: AuthenticationService, private router: Router) {
     this.options = this.settings.getOptions();
 
     // Handle the OAuth2 callback and load user profile
@@ -24,6 +24,7 @@ export class CallbackComponent {
       .then(_ => {
         console.log('Login successful');
         this.profile = this.as.profile;
+        this.router.navigate(['/dashboard']);
       }).catch(err => {
         console.error('Error handling callback', err);
       });