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.

app/Services/Events/EventCommsService.php

@@ -4,6 +4,8 @@ namespace App\Services\Events;
 
 use App\Models\QrCode;
 use App\Models\QrEventRegistration;
+use App\Services\Billing\PlatformEmailClient;
+use App\Services\Billing\PlatformSmsClient;
 use App\Services\Billing\SmsService;
 use App\Services\Messaging\MessagingCredentialsService;
 use Illuminate\Support\Collection;
@@ -23,6 +25,8 @@ class EventCommsService
         private readonly SmsService $sms,
         private readonly MessagingCredentialsService $credentials,
         private readonly EventProgrammeService $programmes,
+        private readonly PlatformEmailClient $platformEmail,
+        private readonly PlatformSmsClient $platformSms,
     ) {}
 
     /** @return array{recipients: int, emails: int, sms: int, estimated_ghs: float, affordable: bool, integrations_error: ?string} */
@@ -188,12 +192,15 @@ class EventCommsService
             $joinUrl,
         ) !== '';
 
-        if ($needsEmail && ! $credential->hasValidBird()) {
-            return 'Connect Ladill Bird in Integrations before sending attendee email.';
+        $emailReady = $this->platformEmail->isConfigured() || $credential->hasValidBird();
+        $smsReady = $this->platformSms->isConfigured() || $credential->hasValidSms();
+
+        if ($needsEmail && ! $emailReady) {
+            return 'Email is not available yet. Bind a mailbox under Account → Messaging once platform keys are configured, or connect Bird under Advanced keys.';
         }
 
-        if ($needsSms && ! $credential->hasValidSms()) {
-            return 'Connect Ladill SMS in Integrations before sending attendee SMS.';
+        if ($needsSms && ! $smsReady) {
+            return 'SMS is not available yet. Ensure platform SMS is configured on this Events instance, or connect a product SMS key under Advanced keys.';
         }
 
         return null;