Initial GameLog setup

- Laravel 11 + Breeze (dark mode) + Tailwind + Alpine.js
- Migrations: games, genres, platforms, companies, pivots,
  user_games, user_lists, reviews, follows, activities
- Models: Game, Genre, Platform, Company, UserGame, UserList,
  Review, ReviewVote, Activity, User (with gamelog fields)
- IgdbService: OAuth2 token management, search, game fetch,
  popular/new releases, genre filter, cover/screenshot URL helpers
- IGDB credentials in config/services.php (from .env)

tests/Feature/Auth/AuthenticationTest.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Tests\Feature\Auth;
+
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AuthenticationTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_login_screen_can_be_rendered(): void
+    {
+        $response = $this->get('/login');
+
+        $response->assertStatus(200);
+    }
+
+    public function test_users_can_authenticate_using_the_login_screen(): void
+    {
+        $user = User::factory()->create();
+
+        $response = $this->post('/login', [
+            'email' => $user->email,
+            'password' => 'password',
+        ]);
+
+        $this->assertAuthenticated();
+        $response->assertRedirect(route('dashboard', absolute: false));
+    }
+
+    public function test_users_can_not_authenticate_with_invalid_password(): void
+    {
+        $user = User::factory()->create();
+
+        $this->post('/login', [
+            'email' => $user->email,
+            'password' => 'wrong-password',
+        ]);
+
+        $this->assertGuest();
+    }
+
+    public function test_users_can_logout(): void
+    {
+        $user = User::factory()->create();
+
+        $response = $this->actingAs($user)->post('/logout');
+
+        $this->assertGuest();
+        $response->assertRedirect('/');
+    }
+}