chore(editor): adjust size of synced doc (#12163)

Close [BS-3418](https://linear.app/affine-design/issue/BS-3418/折叠的embed-doc调整宽度时，会出现一个最小高度，不需要这个)

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

- **New Features**
  - Improved resizing and folding interactions for embedded synced documents in edgeless mode, including dynamic height calculation and enhanced drag-handle styling.
- **Bug Fixes**
  - Adjusted minimum height for synced document embeds to allow more compact display.
  - Ensured consistent width settings across embed cards.
- **Tests**
  - Added end-to-end tests covering folding, unfolding, and resizing behaviors for edgeless synced document embeds.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/shared/src/services/drag-handle-config.ts

@@ -47,6 +47,7 @@ export class DNDAPIExtension extends Extension {
       ...options.props,
       ...(blockId ? { blockId } : {}),
       pageId: docId,
+      style: flavour === 'affine:embed-synced-doc' ? 'syncedDoc' : 'vertical',
     };
     return {
       ...snapshot,