Fix: include wasm assets in pdf.js-based viewer (#13122)

src-ui/angular.json

@@ -79,6 +79,16 @@
                 "glob": "{pdf.worker.min.mjs,pdf.min.mjs}",
                 "input": "node_modules/pdfjs-dist/legacy/build/",
                 "output": "/assets/js/"
+              },
+              {
+                "glob": "**/*",
+                "input": "node_modules/pdfjs-dist/wasm/",
+                "output": "/assets/wasm/"
+              },
+              {
+                "glob": "**/*",
+                "input": "node_modules/pdfjs-dist/iccs/",
+                "output": "/assets/iccs/"
               }
             ],
             "styles": [

src-ui/src/app/components/common/pdf-viewer/pdf-viewer.component.spec.ts

@@ -61,6 +61,7 @@ describe('PngxPdfViewerComponent', () => {
 
   it('resolves the worker source relative to the document base URI', async () => {
     setBaseHref('/paperless/')
+    const getDocumentSpy = jest.spyOn(pdfjs, 'getDocument')
 
     await initComponent()
 
@@ -70,6 +71,13 @@ describe('PngxPdfViewerComponent', () => {
     expect(pdfjs.GlobalWorkerOptions.workerSrc).toContain(
       '/paperless/assets/js/pdf.worker.min.mjs'
     )
+    expect(getDocumentSpy).toHaveBeenCalledWith({
+      url: 'test.pdf',
+      password: undefined,
+      withCredentials: true,
+      wasmUrl: expect.stringContaining('/paperless/assets/wasm/'),
+      iccUrl: expect.stringContaining('/paperless/assets/iccs/'),
+    })
   })
 
   it('initializes single-page viewer and disables text layer', async () => {

src-ui/src/app/components/common/pdf-viewer/pdf-viewer.component.ts

@@ -174,10 +174,12 @@ export class PngxPdfViewerComponent
       'assets/js/pdf.worker.min.mjs',
       this.document.baseURI
     ).toString()
-    let initOptions = {
+    const initOptions = {
       url: this.src,
       password: this.password,
       withCredentials: true,
+      wasmUrl: new URL('assets/wasm/', this.document.baseURI).toString(),
+      iccUrl: new URL('assets/iccs/', this.document.baseURI).toString(),
     }
     this.loadingTask = getDocument(initOptions)
     try {