Fix email system and implement OTP confirmation flow

Email System Fixes:
- Fix email sending after payment: handle-order-paid now calls send-notification
  instead of send-email-v2 directly, properly processing template variables
- Fix order_created email timing: sent immediately after order creation,
  before payment QR code generation
- Update email templates to use short order ID (8 chars) instead of full UUID
- Add working "Akses Sekarang" buttons to payment_success and access_granted emails
- Add platform_url column to platform_settings for email links

OTP Verification Flow:
- Create dedicated /confirm-otp page for users who close registration modal
- Add link in checkout modal and email to dedicated OTP page
- Update OTP email template with better copywriting and dedicated page link
- Fix send-auth-otp to fetch platform settings for dynamic brand_name and platform_url
- Auto-login users after OTP verification in checkout flow

Admin Features:
- Add delete user functionality with cascade deletion of all related data
- Update IntegrasiTab to read/write email settings from platform_settings only
- Add test email template for email configuration testing

Cleanup:
- Remove obsolete send-consultation-reminder and send-test-email functions
- Update send-email-v2 to read email config from platform_settings
- Remove footer links (Ubah Preferensi/Unsubscribe) from email templates

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/components/admin/settings/NotifikasiTab.tsx

@@ -494,37 +494,30 @@ export function NotifikasiTab() {
 
     setTestingTemplate(template.id);
     try {
-      // Fetch email settings from notification_settings
-      const { data: emailData } = await supabase
-        .from('notification_settings')
-        .select('*')
+      // Fetch platform settings to get brand name
+      const { data: platformData } = await supabase
+        .from('platform_settings')
+        .select('brand_name')
         .single();
 
-      if (!emailData || !emailData.api_token || !emailData.from_email) {
-        throw new Error('Konfigurasi email provider belum lengkap');
-      }
+      const brandName = platformData?.brand_name || 'ACCESS HUB';
 
-      // Import EmailTemplateRenderer and ShortcodeProcessor
-      const { EmailTemplateRenderer, ShortcodeProcessor } = await import('@/lib/email-templates/master-template');
+      // Import ShortcodeProcessor to get dummy data
+      const { ShortcodeProcessor } = await import('@/lib/email-templates/master-template');
 
-      // Process shortcodes and render with master template
-      const processedSubject = ShortcodeProcessor.process(template.email_subject || '');
-      const processedContent = ShortcodeProcessor.process(template.email_body_html || '');
-      const fullHtml = EmailTemplateRenderer.render({
-        subject: processedSubject,
-        content: processedContent,
-        brandName: 'ACCESS HUB'
-      });
+      // Get default dummy data for all template variables
+      const dummyData = ShortcodeProcessor.getDummyData();
 
-      // Send test email using send-email-v2
-      const { data, error } = await supabase.functions.invoke('send-email-v2', {
+      // Send test email using send-notification (same as IntegrasiTab)
+      const { data, error } = await supabase.functions.invoke('send-notification', {
         body: {
-          recipient: template.test_email,
-          api_token: emailData.api_token,
-          from_name: emailData.from_name,
-          from_email: emailData.from_email,
-          subject: processedSubject,
-          content: fullHtml,
+          template_key: template.key,
+          recipient_email: template.test_email,
+          recipient_name: dummyData.nama,
+          variables: {
+            ...dummyData,
+            platform_name: brandName,
+          },
         },
       });