chore: initialize math-tasks project

src/scripts/generate-pdf.mjs

@@ -0,0 +1,44 @@
+import puppeteer from 'puppeteer';
+import { resolve, basename } from 'path';
+import { existsSync, mkdirSync } from 'fs';
+import { fileURLToPath } from 'url';
+
+const OUTPUT_DIR = resolve(fileURLToPath(import.meta.url), '../../../output/pdf');
+
+async function generatePdf(htmlPath) {
+  const absolutePath = resolve(htmlPath);
+  if (!existsSync(absolutePath)) {
+    console.error(`File not found: ${absolutePath}`);
+    process.exit(1);
+  }
+
+  mkdirSync(OUTPUT_DIR, { recursive: true });
+
+  const pdfName = basename(absolutePath, '.html') + '.pdf';
+  const pdfPath = resolve(OUTPUT_DIR, pdfName);
+
+  const browser = await puppeteer.launch({ headless: true });
+  const page = await browser.newPage();
+
+  await page.goto(`file://${absolutePath}`, { waitUntil: 'networkidle0' });
+
+  await page.pdf({
+    path: pdfPath,
+    format: 'A4',
+    printBackground: true,
+    margin: { top: 0, right: 0, bottom: 0, left: 0 },
+    preferCSSPageSize: true,
+  });
+
+  await browser.close();
+  console.log(`PDF generated: ${pdfPath}`);
+  return pdfPath;
+}
+
+const htmlFile = process.argv[2];
+if (!htmlFile) {
+  console.error('Usage: node generate-pdf.mjs <html-file>');
+  process.exit(1);
+}
+
+generatePdf(htmlFile);