Restore @zxing/library so CI unit tests can load t-book.

Adding the es2 workspace pruned the peer from the lockfile, which made every Docker matrix job fail before any image was built.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: Tomkoooo

package-lock.json

@@ -65,6 +65,7 @@
     "@types/qrcode": "^1.5.6",
     "@types/uuid": "^10.0.0",
     "@zxing/browser": "^0.2.1",
+    "@zxing/library": "^0.23.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "date-fns": "^4.1.0",