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>

supabase/functions/handle-order-paid/index.ts

@@ -309,18 +309,30 @@ async function sendNotification(
     return;
   }
 
-  // Send email via Mailketing
-  await fetch(`${Deno.env.get("SUPABASE_URL")}/functions/v1/send-email-v2`, {
-    method: "POST",
-    headers: {
-      "Content-Type": "application/json",
-      "Authorization": `Bearer ${Deno.env.get("SUPABASE_ANON_KEY")}`,
-    },
-    body: JSON.stringify({
-      to: data.email,
-      subject: template.email_subject,
-      html: template.email_body_html,
-      shortcodeData: data,
-    }),
-  });
+  // Send email via send-notification (which will process shortcodes and call send-email-v2)
+  try {
+    const notificationResponse = await fetch(`${Deno.env.get("SUPABASE_URL")}/functions/v1/send-notification`, {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+        "Authorization": `Bearer ${Deno.env.get("SUPABASE_SERVICE_ROLE_KEY")}`,
+      },
+      body: JSON.stringify({
+        template_key: templateKey,
+        recipient_email: data.email,
+        recipient_name: data.user_name || data.nama,
+        variables: data,
+      }),
+    });
+
+    if (!notificationResponse.ok) {
+      const errorText = await notificationResponse.text();
+      console.error("[HANDLE-PAID] Notification send failed:", notificationResponse.status, errorText);
+    } else {
+      const result = await notificationResponse.json();
+      console.log("[HANDLE-PAID] Notification sent successfully for template:", templateKey, result);
+    }
+  } catch (error) {
+    console.error("[HANDLE-PAID] Exception sending notification:", error);
+  }
 }