Fix: ensure preview reload on live changes (#13321)

src-ui/src/app/components/document-detail/document-detail.component.html

@@ -472,6 +472,7 @@
           <div class="preview-sticky pdf-viewer-container">
             <pngx-pdf-viewer
               [src]="pdfSource()"
+              [sourceRevision]="previewRevision()"
               [password]="pdfPassword()"
               [renderMode]="PdfRenderMode.All"
               [page]="previewCurrentPage()" (pageChange)="previewCurrentPage.set($event)"

src-ui/src/app/components/document-detail/document-detail.component.spec.ts

@@ -1602,6 +1602,7 @@ describe('DocumentDetailComponent', () => {
     expect(openDoc.__changedFields).toEqual([])
     expect(setDirtySpy).toHaveBeenCalledWith(openDoc, false)
     expect(saveSpy).toHaveBeenCalled()
+    expect(component.previewRevision()).toBe(1)
   })
 
   it('should ignore incoming update for a different document id', () => {

src-ui/src/app/components/document-detail/document-detail.component.ts

@@ -249,6 +249,7 @@ export class DocumentDetailComponent
   titleSubject: Subject<string> = new Subject()
   readonly previewUrl = signal<string>(undefined)
   readonly pdfSource = signal<string>(undefined)
+  readonly previewRevision = signal(0)
   readonly pdfPassword = signal<string>(undefined)
   readonly thumbUrl = signal<string>(undefined)
   readonly previewText = signal<string>(undefined)
@@ -609,6 +610,9 @@ export class DocumentDetailComponent
               .subscribe()
           }
           this.updateComponent(useDoc)
+          if (forceRemote) {
+            this.previewRevision.update((revision) => revision + 1)
+          }
           this.titleSubject
             .pipe(
               debounceTime(1000),