<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Improved how bookmark and footnote icons are displayed by routing image URLs through an image proxy service for enhanced reliability and consistency.
- **Refactor**
- Adjusted the timing of service configuration for link previews and image proxies to occur after document initialization, ensuring more robust setup during content rendering.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-3369](https://linear.app/affine-design/issue/BS-3369/昨天发现-footnote-中的引用，和实际渲染出来的对不上)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Bug Fixes**
- Improved handling of URLs in footnote definitions to ensure all URLs are fully percent-encoded, including those that were only partially encoded before.
- **Tests**
- Added a new test case to verify that partially encoded URLs in footnotes are now fully encoded as expected.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-3343](https://linear.app/affine-design/issue/BS-3343/处理文档-readonly-时-bookmark-citation-preview-data-的获取和显示)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Improved bookmark blocks to display link previews even in readonly mode by dynamically fetching preview data when needed.
- **Refactor**
- Enhanced event handling for bookmark cards, providing more consistent behavior when selecting or opening bookmarks.
- Refined how preview data is sourced and rendered for bookmarks, ensuring more accurate and up-to-date information is shown.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: BS-3393
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a new "Embed Doc" block, enabling embedding and rendering of linked and synced documents within cards, including support for banners and note previews.
- Added new toolbar and quick search options for inserting embedded linked and synced documents.
- **Improvements**
- Updated dependencies and internal references to support the new embed doc functionality across related blocks and components.
- Enhanced support for edgeless environments with new clipboard and configuration options for embedded docs.
- **Refactor**
- Streamlined and reorganized embed-related code, moving linked and synced doc logic into a dedicated embed doc module.
- Removed obsolete adapter and utility files to simplify maintenance.
- **Chores**
- Updated project and TypeScript configuration files to include the new embed doc module in builds and references.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-3122](https://linear.app/affine-design/issue/BS-3122/footnote-definition-adapter-适配)
Closes: [BS-3123](https://linear.app/affine-design/issue/BS-3123/几个-block-card-view-适配-footnote-态)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a new citation card component and web element for displaying citations.
- Added support for citation-style rendering in attachment, bookmark, and linked document blocks.
- Enabled citation parsing from footnote definitions in markdown for attachments, bookmarks, and linked docs.
- Added a feature flag to enable or disable citation features.
- Provided new toolbar logic to disable downloads for citation-style attachments.
- **Improvements**
- Updated block models and properties to support citation identifiers.
- Added localization and settings for the citation experimental feature.
- Enhanced markdown adapters to recognize and process citation footnotes.
- Included new constants and styles for citation card display.
- **Bug Fixes**
- Ensured readonly state is respected in block interactions and rendering for citation blocks.
- **Documentation**
- Added exports and effects for new citation components and features.
- **Tests**
- Updated snapshots to include citation-related properties in block data.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a new pointer graphics module with tools and quick tool integration for edgeless surfaces.
- Added a quick tool button for pointer interactions in edgeless mode.
- Exposed new extension points for pointer graphics and effects.
- **Improvements**
- Integrated pointer graphics as a dependency into related packages.
- Enhanced toolbar context to support additional surface alignment modes.
- Added conditional clipboard configuration registrations for edgeless contexts across multiple block types.
- **Removals**
- Removed legacy tool and effect definitions and related quick tool exports from edgeless components.
- Streamlined extension arrays and removed unused exports for a cleaner codebase.
- Deleted obsolete utility functions and component registrations.
- **Chores**
- Updated workspace and TypeScript project references to include the new pointer graphics module.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-3302](https://linear.app/affine-design/issue/BS-3302/處理-affine-中的-redos-風險)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Bug Fixes**
- Improved handling of footnote definitions with varied spacing, special characters, and malformed or incomplete entries, ensuring more reliable processing and display.
- **New Features**
- Introduced advanced parsing for footnote URLs to improve accuracy and validation of footnote content.
- **Tests**
- Expanded test coverage for footnote processing to include additional edge cases and mixed content scenarios, enhancing overall robustness.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Images and icons in bookmark cards are now loaded through an image proxy for improved reliability and consistency.
- Embed blocks for GitHub, Loom, and YouTube now display banner and creator images via an image proxy service for enhanced image loading.
- **Refactor**
- Simplified backend URL handling and proxy logic for images, resulting in more efficient processing and reduced complexity.
- Consolidated image proxy middleware and services into a shared adapter module for streamlined imports and improved maintainability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-3272](https://linear.app/affine-design/issue/BS-3272/footnote-适配-exa-api-返回结果)
## What's Changed
Add link preview data support (favicon, title, description) for URL references in footnotes:
- Store and display URL preview data in footnotes
- Add encoding/decoding support for favicon URLs
- Optimize link preview by using existing preview data when available
