fix(pdfjs): ensure correct MIME type for PDF.js worker files

scripts/copy-pdfjs-worker.mjs

@@ -3,12 +3,18 @@ import path from 'node:path';
 
 const src = path.resolve('node_modules/pdfjs-dist/build/pdf.worker.min.mjs');
 const destDir = path.resolve('public/pdfjs-dist');
-const dest = path.join(destDir, 'pdf.worker.min.mjs');
+const destMjs = path.join(destDir, 'pdf.worker.min.mjs');
+const destJs = path.join(destDir, 'pdf.worker.min.js');
 
 try {
   fs.mkdirSync(destDir, { recursive: true });
-  fs.copyFileSync(src, dest);
-  console.log(`[pdfjs-dist] Worker copied to: ${dest}`);
+  // 复制 .mjs
+  fs.copyFileSync(src, destMjs);
+  console.log(`[pdfjs-dist] Worker copied to: ${destMjs}`);
+
+  // 同步生成 .js 文件以兼容部分服务器缺少 mjs MIME 的情况
+  fs.copyFileSync(src, destJs);
+  console.log(`[pdfjs-dist] Worker duplicated to: ${destJs}`);
 } catch (err) {
   console.error('[pdfjs-dist] Failed to copy worker:', err);
   process.exitCode = 1;