fix: ai ppt preview with toolbar widget (#8882)

Fix issue [AF-1716](https://linear.app/affine-design/issue/AF-1716).

packages/frontend/core/src/blocksuite/presets/ai/messages/slides-renderer.ts

@@ -1,7 +1,7 @@
 import { BlockStdScope, type EditorHost } from '@blocksuite/affine/block-std';
 import {
   type AffineAIPanelWidgetConfig,
-  EdgelessEditorBlockSpecs,
+  SpecProvider,
 } from '@blocksuite/affine/blocks';
 import { AffineSchemas } from '@blocksuite/affine/blocks/schemas';
 import { WithDisposable } from '@blocksuite/affine/global/utils';
@@ -208,7 +208,8 @@ export class AISlidesRenderer extends WithDisposable(LitElement) {
         >
           ${new BlockStdScope({
             doc: this._doc,
-            extensions: EdgelessEditorBlockSpecs,
+            extensions:
+              SpecProvider.getInstance().getSpec('edgeless:preview').value,
           }).render()}
         </div>
         <div class="mask"></div>

packages/frontend/core/src/components/blocksuite/block-suite-editor/ai/setup-provider.tsx

@@ -438,12 +438,13 @@ Could you make a new website based on these notes and send back just the html fi
       const url = new URL(getBaseUrl() + '/api/copilot/unsplash/photos');
       url.searchParams.set('query', options.query);
       const result: {
-        results: {
+        results?: {
           urls: {
             regular: string;
           };
         }[];
       } = await fetch(url.toString()).then(res => res.json());
+      if (!result.results) return [];
       return result.results.map(r => {
         const url = new URL(r.urls.regular);
         url.searchParams.set('fit', 'crop');