Return captured screenshot buffer

apps/agent/src/lib/render/capture_html.ts

@@ -1,14 +1,15 @@
 import puppeteer from "puppeteer";
 
 /**
- * Captures the rendered HTML as a screenshot.
+ * Captures the rendered HTML as a screenshot and returns it as a buffer.
  */
-export async function captureRenderedHtml(html: string) {
-  const browser = await puppeteer.launch();
+export async function captureRenderedHtml(html: string): Promise<Buffer> {
+  const browser = await puppeteer.launch({ headless: "new" });
   const page = await browser.newPage();
   await page.setViewport({ width: 1920, height: 1080 });
   await page.setContent(html, {
     timeout: 60_000,
   });
-  await page.screenshot({ path: "screenshot.png", fullPage: true });
+  const buffer = await page.screenshot({ fullPage: true });
+  return buffer;
 }