fix: use dynamic imports for puppeteer to prevent Next.js build errors

puppeteer-extra cannot be statically imported in Next.js server bundles.
Using dynamic import() so puppeteer is only loaded at runtime, not at build time.

src/lib/services/cf-fetch.ts

@@ -1,18 +1,16 @@
-import puppeteer from "puppeteer-extra";
-import StealthPlugin from "puppeteer-extra-plugin-stealth";
-
-puppeteer.use(StealthPlugin());
-
 const UA =
 	"Mozilla/5.0 (Windows NT 10.0; Win64; x64) " +
 	"AppleWebKit/537.36 (KHTML, like Gecko) " +
 	"Chrome/125.0.0.0 Safari/537.36";
 
-let browser: Awaited<ReturnType<typeof puppeteer.launch>> | null = null;
+let browser: any = null;
 
 async function getBrowser() {
 	if (browser) return browser;
-	browser = await puppeteer.launch({
+	const puppeteer = await import("puppeteer-extra");
+	const StealthPlugin = await import("puppeteer-extra-plugin-stealth");
+	puppeteer.default.use(StealthPlugin.default());
+	browser = await puppeteer.default.launch({
 		headless: true,
 		args: [
 			"--no-sandbox",