style: format frontend, docs and skills with prettier; add .prettierignore

One-time prettier --write so the new format:check CI gate starts green.
.prettierignore excludes generated (api-client.ts, documentation.json),
vendored (public/cibg-huisstijl), and backend (dotnet format owns it).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/shared/upload/upload-shell.service.ts

@@ -42,16 +42,26 @@ export class UploadShellService {
 
   /** Start (or retry) an upload: queue → progress → complete/failed. */
   upload(req: XhrUploadRequest, dispatch: Dispatch): void {
-    dispatch({ type: 'UploadQueued', localId: req.localId, backgroundSync: this.backgroundSyncAvailable });
+    dispatch({
+      type: 'UploadQueued',
+      localId: req.localId,
+      backgroundSync: this.backgroundSyncAvailable,
+    });
     const { done, cancel } = this.transport.send(req, (pct) =>
       dispatch({ type: 'UploadProgress', localId: req.localId, progressPct: pct }),
     );
     this.inflight.set(req.localId, cancel);
     done
-      .then(({ documentId }) => dispatch({ type: 'UploadComplete', localId: req.localId, documentId }))
+      .then(({ documentId }) =>
+        dispatch({ type: 'UploadComplete', localId: req.localId, documentId }),
+      )
       .catch((e) => {
         if (e !== UPLOAD_ABORTED) {
-          dispatch({ type: 'UploadFailed', localId: req.localId, reason: typeof e === 'string' ? e : '' });
+          dispatch({
+            type: 'UploadFailed',
+            localId: req.localId,
+            reason: typeof e === 'string' ? e : '',
+          });
         }
       })
       .finally(() => this.inflight.delete(req.localId));
@@ -63,7 +73,9 @@ export class UploadShellService {
     this.adapter
       .deleteDocument(documentId)
       .then(() => dispatch({ type: 'UploadDeleteComplete', localId }))
-      .catch((e) => dispatch({ type: 'UploadDeleteFailed', localId, reason: problemDetail(e, '') }));
+      .catch((e) =>
+        dispatch({ type: 'UploadDeleteFailed', localId, reason: problemDetail(e, '') }),
+      );
   }
 
   /** Cancel any in-flight XHRs (e.g. when a category switches to post-delivery). */