fix: DataSourceResolverService.resolve() had no catchError

A category/product facade error propagated through switchMap
uncaught, erroring the shared widget stream (shareReplay) in
WidgetHostService with no fallback - the widget just silently failed
to render, and the error stayed cached for every later subscriber.

Added catchError falling back to an empty { section, settings } shape,
same pattern as the widget-manifest fetch (falls back to { widgets: [] }
on any error, never throws to the UI).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/widgets/resolvers/data-source-resolver.service.ts

@@ -1,5 +1,5 @@
 import { Injectable, inject } from '@angular/core';
-import { Observable, of, map, switchMap } from 'rxjs';
+import { Observable, of, map, switchMap, catchError } from 'rxjs';
 import { CategoryFacade } from '../../facades/platform/category.facade';
 import { ProductFacade } from '../../facades/platform/product.facade';
 import { LanguageService } from '../../services/language.service';
@@ -19,7 +19,11 @@ export class DataSourceResolverService {
 
   resolve(widget: WidgetConfig, section: SectionConfig): Observable<unknown> {
     return this.widgetManifest.getWidget(widget.type).pipe(
-      switchMap((definition) => this.resolveByDefinition(definition, widget, section))
+      switchMap((definition) => this.resolveByDefinition(definition, widget, section)),
+      catchError((error) => {
+        console.error(`Failed to resolve widget data for ${widget.type}:${widget.id}`, error);
+        return of({ section, settings: {} });
+      })
     );
   }