add all controllers logic

tests/Unit/Services/Preferences/PreferencesCommandServiceTest.php

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+<?php
+
+namespace Tests\Unit\Services\Preferences;
+
+use App\Services\Preferences\PreferencesCommandService;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class PreferencesCommandServiceTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_upsert_creates_record(): void
+    {
+        $service = app(PreferencesCommandService::class);
+        $pref = $service->upsert(1, [
+            'receive_email_notifications' => true,
+            'receive_sms_notifications' => false,
+            'theme' => 'light',
+            'language' => 'en',
+        ]);
+
+        $this->assertSame(1, $pref->user_id);
+        $this->assertDatabaseHas('user_preferences', [
+            'user_id' => 1,
+            'notification_email' => 1,
+            'notification_sms' => 0,
+        ]);
+    }
+}

tests/Unit/Services/Preferences/PreferencesOptionsServiceTest.php

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+<?php
+
+namespace Tests\Unit\Services\Preferences;
+
+use App\Services\Preferences\PreferencesOptionsService;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class PreferencesOptionsServiceTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_defaults_include_expected_keys(): void
+    {
+        $service = app(PreferencesOptionsService::class);
+        $defaults = $service->defaultPreferences();
+
+        $this->assertArrayHasKey('receive_email_notifications', $defaults);
+        $this->assertArrayHasKey('receive_sms_notifications', $defaults);
+        $this->assertSame('light', $defaults['theme']);
+    }
+}

tests/Unit/Services/Preferences/PreferencesQueryServiceTest.php

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+<?php
+
+namespace Tests\Unit\Services\Preferences;
+
+use App\Services\Preferences\PreferencesQueryService;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\DB;
+use Tests\TestCase;
+
+class PreferencesQueryServiceTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_get_for_user_returns_defaults_when_missing(): void
+    {
+        $service = app(PreferencesQueryService::class);
+        $payload = $service->getForUser(1);
+
+        $this->assertTrue($payload['preferences']['receive_email_notifications']);
+        $this->assertSame('en', $payload['preferences']['language']);
+    }
+
+    public function test_paginate_filters_by_user_id(): void
+    {
+        DB::table('users')->insert([
+            'id' => 1,
+            'firstname' => 'Test',
+            'lastname' => 'User',
+            'email' => 'test@example.com',
+            'cellphone' => '5555555555',
+            'address_street' => '123 Main',
+            'city' => 'City',
+            'state' => 'ST',
+            'zip' => '12345',
+            'accept_school_policy' => 1,
+            'status' => 'Active',
+            'password' => bcrypt('secret'),
+            'semester' => 'Fall',
+            'school_year' => '2025-2026',
+        ]);
+
+        DB::table('user_preferences')->insert([
+            'user_id' => 1,
+            'notification_email' => 1,
+            'notification_sms' => 1,
+        ]);
+
+        $service = app(PreferencesQueryService::class);
+        $pager = $service->paginate(['user_id' => 1], 1, 10);
+
+        $this->assertSame(1, $pager->total());
+        $this->assertSame(1, $pager->items()[0]->user_id);
+    }
+}