<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a unified loading spinner icon that adapts to light or dark themes automatically.
- **Refactor**
- Streamlined loading icon usage across the app by replacing multiple theme-based icons with a single helper function for consistent and simplified icon management.
- **Chores**
- Removed an unused dependency to improve package management.
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Closes: [BS-3379](https://linear.app/affine-design/issue/BS-3379/恢复在-loading-或错误时-attachments-的背景色)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Style**
- Updated the background color of attachment cards in loading and error states for a more consistent appearance.
- **Bug Fixes**
- Improved the handling and display of loading and uploading states for attachment cards to better reflect their current status.
- **Chores**
- Added new workspace dependencies and project references to enhance synchronization capabilities across related modules.
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