fix(models): correct UserSetting import namespace and add test coverage

tests/Feature/Auth/EmailNotificationTest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Tests\Feature\Auth;
+
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class EmailNotificationTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_verified_user_is_redirected(): void
+    {
+        $user = User::factory()->create();
+
+        $this->actingAs($user)
+            ->post(route('verification.send'))
+            ->assertRedirect(route('dashboard', absolute: false));
+    }
+
+    public function test_unverified_user_gets_notification(): void
+    {
+        $user = User::factory()->unverified()->create();
+
+        $this->actingAs($user)
+            ->post(route('verification.send'))
+            ->assertSessionHas('status', 'verification-link-sent');
+    }
+}