Upgrade app to Next.js 16

lib/contact-guard.ts

@@ -8,8 +8,8 @@ import {
   type ContactProtectionSettings,
 } from "@/lib/contact-protection";
 
-function getClientIpFromHeaders() {
-  const requestHeaders = headers();
+async function getClientIpFromHeaders() {
+  const requestHeaders = await headers();
   const forwardedFor = requestHeaders.get("x-forwarded-for");
 
   if (forwardedFor) {
@@ -41,7 +41,7 @@ export async function enforceContactRateLimit(settings: ContactProtectionSetting
     return;
   }
 
-  const ip = getClientIpFromHeaders();
+  const ip = await getClientIpFromHeaders();
   const key = getRateLimitKey(ip, settings.rateLimit.windowMinutes);
 
   await prisma.$transaction(async (tx) => {
@@ -87,7 +87,7 @@ export async function verifyTurnstileToken(
   const body = new URLSearchParams();
   body.set("secret", settings.turnstile.secretKey);
   body.set("response", token);
-  body.set("remoteip", getClientIpFromHeaders());
+  body.set("remoteip", await getClientIpFromHeaders());
 
   const response = await fetch("https://challenges.cloudflare.com/turnstile/v0/siteverify", {
     method: "POST",