Adiciona sistema de autenticação e painel admin

src/app/admin-panel/admin-panel.component.html

@@ -0,0 +1,4 @@
+<div class="admin-panel">
+    <h2>Painel Administrativo</h2>
+    <button (click)="logout()">Sair</button>
+  </div>

src/app/admin-panel/admin-panel.component.ts

@@ -0,0 +1,15 @@
+import { Component } from '@angular/core';
+import { AuthService } from '../services/auth.service';
+
+@Component({
+  selector: 'app-admin-panel',
+  templateUrl: './admin-panel.component.html',
+  styleUrls: ['./admin-panel.component.css']
+})
+export class AdminPanelComponent {
+  constructor(private authService: AuthService) {}
+
+  logout() {
+    this.authService.logout();
+  }
+}

src/app/login/login.component.html

@@ -0,0 +1,8 @@
+<div class="login-container">
+    <h2>Login</h2>
+    <input type="text" [(ngModel)]="username" placeholder="Usuário">
+    <input type="password" [(ngModel)]="password" placeholder="Senha">
+    <button (click)="login()">Entrar</button>
+    <p *ngIf="errorMessage">{{ errorMessage }}</p>
+  </div>
+

src/app/login/login.component.ts

@@ -0,0 +1,24 @@
+import { Component } from '@angular/core';
+import { Router } from '@angular/router';
+import { AuthService } from '../services/auth.service';
+
+@Component({
+  selector: 'app-login',
+  templateUrl: './login.component.html',
+  styleUrls: ['./login.component.css']
+})
+export class LoginComponent {
+  username: string = '';
+  password: string = '';
+  errorMessage: string = '';
+
+  constructor(private authService: AuthService, private router: Router) {}
+
+  login() {
+    if (this.authService.login(this.username, this.password)) {
+      this.router.navigate(['/admin']);
+    } else {
+      this.errorMessage = 'Usuário ou senha inválidos!';
+    }
+  }
+}

src/app/services/auth.service.ts

@@ -0,0 +1,26 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class AuthService {
+  private isAuthenticated = false;
+
+  login(username: string, password: string): boolean {
+    if (username === 'admin' && password === 'admin123') {
+      this.isAuthenticated = true;
+      localStorage.setItem('user', JSON.stringify({ username }));
+      return true;
+    }
+    return false;
+  }
+
+  logout(): void {
+    this.isAuthenticated = false;
+    localStorage.removeItem('user');
+  }
+
+  isLoggedIn(): boolean {
+    return localStorage.getItem('user') !== null;
+  }
+}

src/app/services/theme.service.ts

@@ -0,0 +1,17 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ThemeService {
+  private darkTheme = false;
+
+  toggleTheme(): void {
+    this.darkTheme = !this.darkTheme;
+    document.body.classList.toggle('dark-mode', this.darkTheme);
+  }
+
+  isDarkTheme(): boolean {
+    return this.darkTheme;
+  }
+}

src/styles.css

@@ -10,3 +10,8 @@
 body{
   background-color: #1F1147;
 }
+
+.dark-mode {
+  background-color: #121212;
+  color: white;
+}