[FIX] Fix PDF.js worker require is not defined error in staging (#1717)

Author: vishnuszipstack

frontend/.gitignore

@@ -11,6 +11,9 @@
 # production
 /build
 
+# pdfjs worker file (copied from node_modules via postinstall)
+/public/pdf.worker.min.js
+
 # misc
 .DS_Store
 .env.local

frontend/package.json

@@ -57,6 +57,7 @@
     "zustand": "^4.3.8"
   },
   "scripts": {
+    "postinstall": "cp node_modules/pdfjs-dist/build/pdf.worker.min.js public/pdf.worker.min.js",
     "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",

frontend/src/helpers/pdfWorkerConfig.js

@@ -1,6 +1,4 @@
-// Webpack 5 / Vite compatible asset module
-// Works with both CRA (Webpack) and Vite bundlers
-export const PDF_WORKER_URL = new URL(
-  "pdfjs-dist/build/pdf.worker.min.js",
-  import.meta.url
-).toString();
+// Use the worker file from the public folder (served as static asset)
+// This avoids Webpack processing which incorrectly bundles it with require() statements
+// Note: The ?url import suffix only works in Vite, not in CRA (Webpack)
+export const PDF_WORKER_URL = "/pdf.worker.min.js";