feat(core): remove preview footnote hover effect config (#11695)

Close [BS-3115](https://linear.app/affine-design/issue/BS-3115/侧边栏-footnote-ui-和用户行为与编辑器内统一)

packages/frontend/core/src/modules/peek-view/view/ai-chat-block-peek-view/index.tsx

@@ -1,7 +1,6 @@
 import { toReactNode } from '@affine/component';
 import { AIChatBlockPeekViewTemplate } from '@affine/core/blocksuite/ai';
 import type { AIChatBlockModel } from '@affine/core/blocksuite/ai/blocks/ai-chat-block/model/ai-chat-model';
-import { enableFootnoteConfigExtension } from '@affine/core/blocksuite/extensions';
 import { useAIChatConfig } from '@affine/core/components/hooks/affine/use-ai-chat-config';
 import { SpecProvider } from '@blocksuite/affine/shared/utils';
 import type { EditorHost } from '@blocksuite/affine/std';
@@ -19,9 +18,7 @@ export const AIChatBlockPeekView = ({
   const { docDisplayConfig, searchMenuConfig, networkSearchConfig } =
     useAIChatConfig();
   return useMemo(() => {
-    const previewSpecBuilder = enableFootnoteConfigExtension(
-      SpecProvider._.getSpec('preview:page')
-    );
+    const previewSpecBuilder = SpecProvider._.getSpec('preview:page');
     const template = AIChatBlockPeekViewTemplate(
       model,
       host,