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/delete-user/index.ts

@@ -0,0 +1,61 @@
+import { serve } from "https://deno.land/std@0.190.0/http/server.ts";
+import { createClient } from "https://esm.sh/@supabase/supabase-js@2";
+
+const corsHeaders = {
+  "Access-Control-Allow-Origin": "*",
+  "Access-Control-Allow-Headers": "authorization, x-client-info, apikey, content-type",
+};
+
+interface DeleteUserRequest {
+  user_id: string;
+}
+
+serve(async (req: Request) => {
+  if (req.method === "OPTIONS") {
+    return new Response(null, { headers: corsHeaders });
+  }
+
+  try {
+    const body: DeleteUserRequest = await req.json();
+    const { user_id } = body;
+
+    if (!user_id) {
+      return new Response(
+        JSON.stringify({ success: false, message: "user_id is required" }),
+        { status: 400, headers: { ...corsHeaders, "Content-Type": "application/json" } }
+      );
+    }
+
+    const supabaseUrl = Deno.env.get("SUPABASE_URL")!;
+    const supabaseServiceKey = Deno.env.get("SUPABASE_SERVICE_ROLE_KEY")!;
+    const supabase = createClient(supabaseUrl, supabaseServiceKey, {
+      auth: {
+        autoRefreshToken: false,
+        persistSession: false
+      }
+    });
+
+    console.log(`Deleting user from auth.users: ${user_id}`);
+
+    // Delete user from auth.users using admin API
+    const { error: deleteError } = await supabase.auth.admin.deleteUser(user_id);
+
+    if (deleteError) {
+      console.error('Error deleting user from auth.users:', deleteError);
+      throw new Error(`Failed to delete user from auth: ${deleteError.message}`);
+    }
+
+    console.log(`Successfully deleted user: ${user_id}`);
+
+    return new Response(
+      JSON.stringify({ success: true, message: "User deleted successfully" }),
+      { status: 200, headers: { ...corsHeaders, "Content-Type": "application/json" } }
+    );
+  } catch (error: any) {
+    console.error("Error deleting user:", error);
+    return new Response(
+      JSON.stringify({ success: false, message: error.message }),
+      { status: 500, headers: { ...corsHeaders, "Content-Type": "application/json" } }
+    );
+  }
+});