feat(resume): add PDF download functionality with server endpoint

- Add useResumePdf composable for client-side PDF download handling
- Implement /api/resume/pdf server endpoint for PDF generation
- Add puppeteer and @sparticuz/chromium dependencies for PDF rendering
- Add puppeteer-core for headless browser automation
- Update Vercel configuration to support PDF generation
- Include loading state management and error handling with toast notifications
- Implement blob download with automatic filename generation
- Add memory leak prevention through object URL revocation

server/api/resume/pdf.get.ts

@@ -0,0 +1,82 @@
+import puppeteer from 'puppeteer'
+import type { Browser } from 'puppeteer'
+
+export default defineEventHandler(async (event) => {
+  let browser: Browser | null = null
+
+  try {
+    // Get base URL from request
+    const requestUrl = getRequestURL(event)
+    const baseUrl = `${requestUrl.protocol}//${requestUrl.host}`
+    const resumeUrl = `${baseUrl}/resume?print=true`
+
+    // Launch browser
+    const isDev = process.env.NODE_ENV === 'development'
+
+    if (isDev) {
+      // Development: use puppeteer with bundled Chromium
+      browser = await puppeteer.launch({
+        headless: true,
+      })
+    } else {
+      // Production: use puppeteer-core with @sparticuz/chromium
+      const chromium = await import('@sparticuz/chromium')
+      const puppeteerCore = await import('puppeteer-core')
+
+      browser = await puppeteerCore.default.launch({
+        args: chromium.default.args,
+        executablePath: await chromium.default.executablePath(),
+        headless: chromium.default.headless,
+      })
+    }
+
+    // Create page and navigate
+    const page = await browser.newPage()
+
+    // Set viewport to A4 dimensions
+    await page.setViewport({
+      width: 794, // A4 width in pixels at 96 DPI
+      height: 1123, // A4 height in pixels at 96 DPI
+    })
+
+    // Navigate to resume page with print mode
+    await page.goto(resumeUrl, {
+      waitUntil: 'networkidle0',
+      timeout: 10000,
+    })
+
+    // Generate PDF
+    const pdf = await page.pdf({
+      format: 'A4',
+      printBackground: true,
+      margin: {
+        top: 0,
+        right: 0,
+        bottom: 0,
+        left: 0,
+      },
+    })
+
+    // Set response headers (AC1, AC2)
+    setResponseHeaders(event, {
+      'Content-Type': 'application/pdf',
+      'Content-Disposition': 'attachment; filename="Ali_Arghyani_Resume.pdf"',
+    })
+
+    return pdf
+  } catch (error) {
+    // Error handling (AC7)
+    console.error('PDF generation failed:', error)
+
+    setResponseStatus(event, 500)
+    return {
+      error: 'PDF generation failed',
+      message: error instanceof Error ? error.message : 'Unknown error',
+    }
+  } finally {
+    // Always close browser to prevent memory leaks
+    if (browser) {
+      await browser.close()
+    }
+  }
+})