fix(events): point Messaging settings at suite defaults, not API keys

Mirror Care: suite platform keys count as ready for attendee email/SMS;
Account Messaging is primary, product Bird/SMS keys are advanced.
SmsService now prefers channel=suite before customer API keys.

tests/Feature/EventsMessagingIntegrationsTest.php

@@ -39,7 +39,8 @@ class EventsMessagingIntegrationsTest extends TestCase
             ->assertOk()
             ->assertSee('SMS')
             ->assertSee('Email')
-            ->assertSee('credentials for outbound messaging');
+            ->assertSee('work by default')
+            ->assertSee('optional');
     }
 
     public function test_saving_sms_credentials_encrypts_key(): void

tests/Feature/EventsSuiteMessagingTest.php

@@ -91,6 +91,34 @@ class EventsSuiteMessagingTest extends TestCase
         $this->assertTrue(app(EventMailer::class)->isConfiguredForOwner($user->public_id));
     }
 
+    public function test_sms_service_uses_suite_when_platform_configured(): void
+    {
+        config([
+            'sms.platform_api_key' => 'events-sms-key',
+            'sms.platform_api_url' => 'https://platform.test/api',
+        ]);
+
+        Http::fake([
+            'platform.test/api/sms/messages/send' => Http::response(['success' => true, 'path' => 'suite']),
+        ]);
+
+        $user = User::factory()->create(['public_id' => 'usr_sms_suite']);
+        $ok = app(\App\Services\Billing\SmsService::class)->send(
+            $user->public_id,
+            '0241234567',
+            'Programme link',
+        );
+
+        $this->assertTrue($ok);
+        $this->assertTrue(app(\App\Services\Billing\SmsService::class)->isConfiguredForOwner($user->public_id));
+        Http::assertSent(function ($request) {
+            $data = $request->data();
+
+            return str_contains($request->url(), '/sms/messages/send')
+                && ($data['channel'] ?? null) === 'suite';
+        });
+    }
+
     public function test_billing_client_syncs_suite_entitlement(): void
     {
         config([