<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Chores**
- Removed multiple internal export entries related to effects modules across various packages.
- Updated dependencies and configuration references to improve internal consistency. No visible changes for end-users.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-3485](https://linear.app/affine-design/issue/BS-3485/粘贴-html-格式的内容时，紧邻着-bold-text-的普通文本会丢失空格)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Bug Fixes**
- Improved handling of spaces and whitespace in paragraphs when converting HTML with inline formatting, ensuring spaces are preserved as in the original content.
- **Tests**
- Added a new test to verify that spaces are correctly preserved in paragraphs containing bold and italic formatting during HTML conversion.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Refactor**
- Streamlined and consolidated block and inline extension exports by removing multiple block-spec and inline extension arrays from public APIs.
- Reduced exported constants, types, and utility functions related to various block and embed features.
- Simplified the codebase by removing deprecated type guards, adapter extensions, and redundant extension groupings.
- **Chores**
- Cleaned up internal APIs by deleting unused exports, imports, and outdated code, enhancing maintainability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-2578](https://linear.app/affine-design/issue/BS-2578/优化-footnote-预览的逻辑：支持缓存结果，避免重复-loading)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a link preview caching mechanism, enabling faster and more efficient reuse of link preview data across the app.
- Added a feature flag for enabling or disabling link preview cache, configurable through workspace experimental settings.
- Enhanced localization with new entries describing the link preview cache feature.
- **Improvements**
- Updated link preview service architecture for better extensibility and maintainability.
- Improved integration of feature flags throughout chat and rendering components.
- **Bug Fixes**
- Fixed tooltip formatting for footnote URLs.
- **Chores**
- Updated dependencies and localization completeness tracking.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Refactor**
- Unified internal data access by replacing all references from `doc` to `store` across all components, blocks, widgets, and utilities. This affects how readonly state, block operations, and service retrieval are handled throughout the application.
- **Tests**
- Updated all test utilities and test cases to use `store` instead of `doc` for document-related operations.
- **Chores**
- Updated context providers and property names to reflect the change from `doc` to `store` for improved consistency and maintainability.
No user-facing features or behaviors have changed.
<!-- 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**
- 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 -->
<!-- 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.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Close [BS-3268](https://linear.app/affine-design/issue/BS-3268/edgeless-下，-dark-mode-embed的配色应该更加清晰)
Close [BS-3067](https://linear.app/affine-design/issue/BS-3067/在embed上，添加split-view等相关的操作入口，基本接近page-block（见设计稿）)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced an interactive header for embedded synced documents with fold/unfold toggle, document opening, and multiple view options.
- Added info and copy link buttons for embedded synced documents and notes to improve document management and sharing.
- **Enhancements**
- Updated styles for embedded synced document blocks and headers for better visual consistency.
- Added new localization entries for header actions: "Fold", "Unfold", and "Open".
- Disabled redundant open document actions in toolbars, centralizing controls in the header.
- **Refactor**
- Unified header button components for notes and embedded synced documents into reusable components.
- Simplified header components by delegating button behaviors to shared components.
- **Bug Fixes**
- Fixed conditional rendering of editor content in embedded synced documents when folded.
- **Chores**
- Upgraded theme dependency version from "^1.1.12" to "^1.1.14" across multiple packages.
<!-- 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 -->
Closes: [BS-3113](https://linear.app/affine-design/issue/BS-3113/footnote-popup-ui-更新)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Added a description display below the chip in the footnote popup when available.
- **Style**
- Improved the appearance of footnote popups with enhanced border radius, padding, and layout.
- Updated font styling for labels and descriptions.
- Simplified chip styling by reducing height and removing unnecessary CSS properties.
- **Bug Fixes**
- Tooltip content for URL references now displays both the link preview title and URL when available.
- **Refactor**
- Simplified click handling by attaching it to the container instead of individual elements.
- Removed unused click event properties from the footnote popup chip.
<!-- 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
