## New Features
* **Block Meta Markdown Adapter**：Inject the Block's metadata into
Markdown.
* **UI**：Apply interaction
* **Widget**
* Block-Level Widget: Displays the diffs of individual blocks within the
main content and supports accepting/rejecting individual diffs.
* Page-Level Widget: Displays global options (Accept all/Reject all).
* **Block Diff Service**：Bridge widget and diff data
* Widget subscribes to DiffMap(RenderDiff) data, refreshing the view
when the data changes.
* Widget performs operations such as Accept/Reject via methods provided
by Service.
* **Doc Edit Tool Card**:
* Display apply preview of semantic doc edit
* Support apply & accept/reject to the main content
* **Apply Playground**：A devtool for testing apply new content to
current
> CLOSE AI-274 AI-275 AI-276 AI-278
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Introduced block-level markdown diffing with accept/reject controls
for insertions, deletions, and updates.
* Added block diff widgets for individual blocks and pages, featuring
navigation and bulk accept/reject actions.
* Provided a block diff playground for testing and previewing markdown
changes (development mode only).
* Added a new document editing AI tool component with interactive diff
viewing and change application.
* Supported rendering of the document editing tool within AI chat
content streams.
* **Improvements**
* Enhanced widget rendering in list, paragraph, data view, and database
blocks for improved extensibility.
* Improved widget flavour matching with hierarchical wildcard support
for more flexible UI integration.
* **Chores**
* Updated the "@toeverything/theme" dependency to version ^1.1.16 across
multiple packages.
* Added new workspace dependencies for core frontend packages to improve
module linkage.
* Extended global styles with visual highlights for deleted blocks in AI
block diff feature.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Related to: [BS-3559](https://linear.app/affine-design/issue/BS-3559/ui-%E5%9B%BE%E7%89%87-loading-%E5%8F%98%E9%87%8F%E6%9B%B4%E6%96%B0)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Style**
- Improved the appearance of image loading indicators by updating background and ring colors for a more consistent visual experience.
- **New Features**
- Added customization options for the loading icon's ring color.
- **Chores**
- Updated the "@toeverything/theme" dependency to version ^1.1.15 across multiple packages for improved consistency and compatibility.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-2539](https://linear.app/affine-design/issue/BS-2539/为-affine-添加-ef，并且支持在-affine-预览对应的功能)
> [!warning]
> This feature is only available in the canary build and is intended for debugging purposes.
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced an "Adapter Panel" feature with a new sidebar tab for previewing document content in multiple formats (Markdown, PlainText, HTML, Snapshot), controllable via a feature flag.
- Added a fully integrated adapter panel component with reactive UI elements for selecting adapters, toggling HTML preview modes, and updating content.
- Provided a customizable adapter panel for both main app and playground environments, supporting content transformation pipelines and export previews.
- Enabled seamless toggling and live updating of adapter panel content through intuitive menus and controls.
- **Localization**
- Added English translations and descriptive settings for the Adapter Panel feature.
- **Chores**
- Added new package and workspace dependencies along with TypeScript project references to support the Adapter Panel modules and components.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
