From 3a4aabff1d539cf6623df75148c53b659a0c7e0a Mon Sep 17 00:00:00 2001
From: vikingowl <christian@nachtigall.dev>
Date: Sat, 3 Jan 2026 22:16:19 +0100
Subject: [PATCH] fix: bundle PDF.js worker locally to fix CDN loading issues

- Add postinstall script to copy worker to static/
- Update Dockerfile to copy worker during build
- Update file-processor to try local worker first, fallback to CDN
- Bump version to 0.4.11
---
 .gitignore                               |  3 +++
 backend/cmd/server/main.go               |  2 +-
 frontend/Dockerfile                      |  4 ++++
 frontend/package.json                    |  5 +++--
 frontend/src/lib/utils/file-processor.ts | 14 ++++++++++++--
 5 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/.gitignore b/.gitignore
index 572b1c3..461a096 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,3 +42,6 @@ dev.env
 backend/vessel-backend
 data/
 backend/data-dev/
+
+# Generated files
+frontend/static/pdf.worker.min.mjs
diff --git a/backend/cmd/server/main.go b/backend/cmd/server/main.go
index 7cc26ff..5a31e0e 100644
--- a/backend/cmd/server/main.go
+++ b/backend/cmd/server/main.go
@@ -18,7 +18,7 @@ import (
 )
 
 // Version is set at build time via -ldflags, or defaults to dev
-var Version = "0.4.10"
+var Version = "0.4.11"
 
 func getEnvOrDefault(key, defaultValue string) string {
 	if value := os.Getenv(key); value != "" {
diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index 7885081..76323a7 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -12,6 +12,10 @@ RUN npm ci
 # Copy source code
 COPY . .
 
+# Copy PDF.js worker to static directory for local serving
+# This avoids CDN dependency and CORS issues with ESM modules
+RUN cp node_modules/pdfjs-dist/build/pdf.worker.min.mjs static/
+
 # Build the application
 RUN npm run build
 
diff --git a/frontend/package.json b/frontend/package.json
index 3d5735e..62ff96a 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vessel",
-  "version": "0.4.10",
+  "version": "0.4.11",
   "private": true,
   "type": "module",
   "scripts": {
@@ -11,7 +11,8 @@
     "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
     "test": "vitest run",
     "test:watch": "vitest",
-    "test:coverage": "vitest run --coverage"
+    "test:coverage": "vitest run --coverage",
+    "postinstall": "cp node_modules/pdfjs-dist/build/pdf.worker.min.mjs static/ 2>/dev/null || true"
   },
   "devDependencies": {
     "@sveltejs/adapter-auto": "^4.0.0",
diff --git a/frontend/src/lib/utils/file-processor.ts b/frontend/src/lib/utils/file-processor.ts
index 4e3078b..7f969a6 100644
--- a/frontend/src/lib/utils/file-processor.ts
+++ b/frontend/src/lib/utils/file-processor.ts
@@ -150,8 +150,18 @@ async function loadPdfJs(): Promise<typeof import('pdfjs-dist')> {
 	try {
 		pdfjsLib = await import('pdfjs-dist');
 
-		// Set worker source using CDN for reliability
-		pdfjsLib.GlobalWorkerOptions.workerSrc = `https://cdnjs.cloudflare.com/ajax/libs/pdf.js/${pdfjsLib.version}/pdf.worker.min.mjs`;
+		// Use locally bundled worker (copied to static/ during build)
+		// Falls back to CDN if local worker isn't available
+		const localWorkerPath = '/pdf.worker.min.mjs';
+		const cdnWorkerPath = `https://cdnjs.cloudflare.com/ajax/libs/pdf.js/${pdfjsLib.version}/pdf.worker.min.mjs`;
+
+		// Try local first, with CDN fallback
+		try {
+			const response = await fetch(localWorkerPath, { method: 'HEAD' });
+			pdfjsLib.GlobalWorkerOptions.workerSrc = response.ok ? localWorkerPath : cdnWorkerPath;
+		} catch {
+			pdfjsLib.GlobalWorkerOptions.workerSrc = cdnWorkerPath;
+		}
 
 		return pdfjsLib;
 	} catch (error) {