add

src/app/(main)/api/auth/signup/route.ts

@@ -8,6 +8,7 @@ import { rateLimit, getClientIdentifier, RateLimits } from '@/lib/rateLimit';
 import { getAuthCookieOptions } from '@/lib/cookieConfig';
 import { signupSchema, validateRequest } from '@/lib/validationSchemas';
 import { sendWelcomeEmail } from '@/lib/email';
+import { sendConversionEvent } from '@/lib/meta';
 
 export async function POST(request: NextRequest) {
   try {
@@ -82,6 +83,19 @@ export async function POST(request: NextRequest) {
       console.error('Welcome email failed:', emailError);
     }
 
+    // Meta Conversions API — CompleteRegistration event
+    sendConversionEvent({
+      eventName: 'CompleteRegistration',
+      userData: {
+        email: user.email,
+        ip: request.headers.get('x-forwarded-for')?.split(',')[0] ?? undefined,
+        userAgent: request.headers.get('user-agent') ?? undefined,
+        fbc: request.cookies.get('_fbc')?.value,
+        fbp: request.cookies.get('_fbp')?.value,
+      },
+      eventSourceUrl: `${process.env.NEXT_PUBLIC_APP_URL}/signup`,
+    }).catch(console.error);
+
     // Create response
     const response = NextResponse.json({
       success: true,