fix(core): should use AttachmentViewerView in split view and standalone page (#12323)

Closes: [AF-2564](https://linear.app/affine-design/issue/AF-2564/pdf-split-view-多了-header)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **Refactor**
  - Improved code clarity and maintainability with clearer comments and streamlined property usage.
  - Updated the workspace attachment page to use a more context-appropriate attachment viewer component.
- **Style**
  - Minor formatting improvements for better code readability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/modules/pdf/views/page-renderer.tsx

@@ -142,12 +142,13 @@ interface PageRendererInnerProps {
 const PageRendererInner = forwardRef<HTMLCanvasElement, PageRendererInnerProps>(
   ({ img, err }, ref) => {
     if (img) {
+      const { width, height } = img;
       return (
         <PDFPageCanvas
           ref={ref}
           style={{
-            height: img.height / 2,
-            aspectRatio: `${img.width} / ${img.height}`,
+            height: height / 2,
+            aspectRatio: `${width} / ${height}`,
           }}
         />
       );