feat(core): add status to pdf viewer (#12349)

Closes: [BS-3439](https://linear.app/affine-design/issue/BS-3439/pdf-独立页面split-view-中的-status-组件)
Related to: [BS-3143](https://linear.app/affine-design/issue/BS-3143/更新-loading-和错误样式)

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

- **New Features**
  - Added a dedicated error handling and reload interface for PDF attachments, allowing users to retry loading PDFs when errors occur.

- **Refactor**
  - Improved PDF viewer interface with clearer loading and error states.
  - Enhanced attachment type detection for better performance and maintainability.
  - Streamlined attachment preview logic for more direct and efficient model retrieval.
  - Simplified internal PDF metadata handling and control flow for improved clarity.
  - Clarified conditional rendering logic in attachment viewer components.
  - Introduced explicit loading state management and refined rendering logic in attachment pages.

- **Style**
  - Updated and added styles for PDF viewer controls and error status display.

- **Tests**
  - Added end-to-end tests validating PDF preview error handling and attachment not-found scenarios.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/modules/pdf/entities/pdf.ts

@@ -37,9 +37,7 @@ export class PDF extends Entity<AttachmentBlockModel> {
   readonly state$ = LiveData.from<PDFRendererState>(
     // @ts-expect-error type alias
     from(downloadBlobToBuffer(this.props)).pipe(
-      switchMap(buffer => {
-        return this.renderer.ob$('open', { data: buffer });
-      }),
+      switchMap(data => this.renderer.ob$('open', { data })),
       map(meta => ({ status: PDFStatus.Opened, meta })),
       // @ts-expect-error type alias
       startWith({ status: PDFStatus.Opening }),

packages/frontend/core/src/modules/pdf/index.ts

@@ -15,5 +15,5 @@ export function configurePDFModule(framework: Framework) {
 
 export { PDF, type PDFRendererState, PDFStatus } from './entities/pdf';
 export { PDFPage } from './entities/pdf-page';
-export { PDFRenderer } from './renderer';
+export { type PDFMeta, PDFRenderer } from './renderer';
 export { PDFService } from './services/pdf';