feat: complete email infrastructure with queue, templates, logging, and API

Adds the full transactional email system:
- Redis queue (QUEUE_CONNECTION=redis), SES config in .env.example
- 3 migrations: organisation_email_settings, organisation_email_templates, email_logs
- EmailTemplateType and EmailLogStatus enums with Dutch defaults
- EmailService as central entry point for all email sending
- SendTransactionalEmail queued job with retries and idempotency
- TransactionalMail mailable with responsive HTML + plain text templates
- Organisation-level branding (colors, logo, footer, reply-to)
- Per-type template overrides with {variable} substitution
- Email log with filtering by status, type, date range, recipient
- Preview and send-test endpoints for template management
- API endpoints: email-settings, email-templates (CRUD), email-logs (read-only)
- Integrated into existing flows: invitations, password reset, email
  verification, registration approval/rejection
- 37 new tests across 4 test files, all existing tests updated

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/tests/Feature/Api/V1/PersonApprovalEmailTest.php

@@ -4,8 +4,8 @@ declare(strict_types=1);
 
 namespace Tests\Feature\Api\V1;
 
-use App\Mail\RegistrationApprovedMail;
-use App\Mail\RegistrationRejectedMail;
+use App\Jobs\SendTransactionalEmail;
+use App\Enums\EmailTemplateType;
 use App\Models\CrowdType;
 use App\Models\Event;
 use App\Models\Organisation;
@@ -13,7 +13,7 @@ use App\Models\Person;
 use App\Models\User;
 use Database\Seeders\RoleSeeder;
 use Illuminate\Foundation\Testing\RefreshDatabase;
-use Illuminate\Support\Facades\Mail;
+use Illuminate\Support\Facades\Queue;
 use Laravel\Sanctum\Sanctum;
 use Tests\TestCase;
 
@@ -46,7 +46,7 @@ class PersonApprovalEmailTest extends TestCase
 
     public function test_approving_person_sends_approved_email(): void
     {
-        Mail::fake();
+        Queue::fake();
 
         $person = Person::factory()->create([
             'event_id' => $this->event->id,
@@ -61,14 +61,20 @@ class PersonApprovalEmailTest extends TestCase
 
         $response->assertOk();
 
-        Mail::assertQueued(RegistrationApprovedMail::class, function ($mail) {
-            return $mail->hasTo('volunteer@test.nl');
+        Queue::assertPushed(SendTransactionalEmail::class, function ($job) {
+            return $job->recipientEmail === 'volunteer@test.nl'
+                && $job->type === EmailTemplateType::REGISTRATION_APPROVED;
         });
+
+        $this->assertDatabaseHas('email_logs', [
+            'recipient_email' => 'volunteer@test.nl',
+            'template_type' => 'registration_approved',
+        ]);
     }
 
     public function test_rejecting_person_sends_rejected_email_with_reason(): void
     {
-        Mail::fake();
+        Queue::fake();
 
         $person = Person::factory()->create([
             'event_id' => $this->event->id,
@@ -90,15 +96,15 @@ class PersonApprovalEmailTest extends TestCase
             'status' => 'rejected',
         ]);
 
-        Mail::assertQueued(RegistrationRejectedMail::class, function ($mail) {
-            return $mail->hasTo('volunteer@test.nl')
-                && $mail->reason === 'Geen beschikbaarheid op de juiste momenten.';
+        Queue::assertPushed(SendTransactionalEmail::class, function ($job) {
+            return $job->recipientEmail === 'volunteer@test.nl'
+                && $job->type === EmailTemplateType::REGISTRATION_REJECTED;
         });
     }
 
     public function test_rejecting_person_sends_rejected_email_without_reason(): void
     {
-        Mail::fake();
+        Queue::fake();
 
         $person = Person::factory()->create([
             'event_id' => $this->event->id,
@@ -113,9 +119,9 @@ class PersonApprovalEmailTest extends TestCase
 
         $response->assertOk();
 
-        Mail::assertQueued(RegistrationRejectedMail::class, function ($mail) {
-            return $mail->hasTo('volunteer@test.nl')
-                && $mail->reason === null;
+        Queue::assertPushed(SendTransactionalEmail::class, function ($job) {
+            return $job->recipientEmail === 'volunteer@test.nl'
+                && $job->type === EmailTemplateType::REGISTRATION_REJECTED;
         });
     }