Closes: [BS-3506](https://linear.app/affine-design/issue/BS-3506/edgeless-text-默认改为黑色)
### Dark
<img width="691" alt="Screenshot 2025-05-19 at 19 32 52" src="https://github.com/user-attachments/assets/2927d13b-0300-4293-8f8f-7891fd87a680" />
### Light
<img width="639" alt="Screenshot 2025-05-19 at 19 33 05" src="https://github.com/user-attachments/assets/4429f6f9-b374-4b17-87f4-ae09204f1538" />
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Improved edgeless text block styling to support theme-based color, font, and alignment settings.
- **Style**
- Updated the default text color in edgeless text blocks to black, with support for separate dark and light mode colors.
- **Bug Fixes**
- Ensured the color picker and block rendering reflect the updated default color.
- **Tests**
- Adjusted tests and snapshots to expect the new default color and theme-based color structure.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-3511](https://linear.app/affine-design/issue/BS-3511/当选中-connector-时，toolbar-上文字颜色选项颜色显示不正确)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Tests**
- Added end-to-end tests for the edgeless connector feature, verifying toolbar text color functionality and theme-based color changes.
- **Refactor**
- Improved performance of text toolbar actions by optimizing internal data handling for font and color selection. No changes to visible behavior.
<!-- 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 slider component for line width selection, providing a more interactive and streamlined UI.
- Added support for using the slider component across relevant panels.
- **Improvements**
- Simplified the line width selection panel for easier use and improved maintainability.
- Enhanced event handling to prevent dropdowns from closing when interacting with the panel.
- **Bug Fixes**
- Improved event propagation control within the line styles panel.
- **Chores**
- Updated package exports to include the new slider component.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Close [BS-3404](https://linear.app/affine-design/issue/BS-3404/通过embed-doc时，插入的doc还是card-view，应该要默认embed-view)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Added the ability to insert and display embedded synced documents, supporting different link types based on editor mode and user preferences.
- Introduced new UI interactions and view options for embedded synced documents in edgeless mode.
- **Bug Fixes**
- Updated UI selectors and preference keys to ensure consistent behavior and correct application of user settings.
- **Tests**
- Added and updated end-to-end tests for embedding synced documents, including header interactions and viewport fitting.
- Improved test coverage for quick search insertion and edgeless embed synced doc features.
- **Chores**
- Renamed settings and updated exports to align with new embedding functionality.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Close [BS-3288](https://linear.app/affine-design/issue/BS-3288/从note转换-linked-doc-时，默认把note的第一行填入doc拟定的标题)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- When converting a note block to a linked document, the initial document title now uses the first paragraph in the note (if available) as a placeholder.
- **Tests**
- Updated tests to verify that the linked document creation modal pre-fills the title with the note's first paragraph and checks for correct paragraph order.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
### What Changes
- Refactors the `notify` function call with undo button. It is called `notifyWithUndo`, which can associate the visibility of the `NotificationCard` with the top undo item in history stack, such as undo by shortcut `Cmd+Z`.
- change icon of the "Insert into page" button. Close [BS-3267](https://linear.app/affine-design/issue/BS-3267/frame和group的insert-into-page图标也更换一下)
Closes: [BS-2909](https://linear.app/affine-design/issue/BS-2909/新增highlighter)
### What's Changed!
Currently the highlighter tool is very similar to brush, but for the future, it's a standalone module.
* Added `Highlighter` element model
* Added `Highlighter` tool
* Added `Highlighter` entry to the global toolbar
### TL;DR
Moved editor components from BlockSuite presets to AFFiNE core and updated imports accordingly.
### What changed?
- Relocated `EdgelessEditor` and `PageEditor` components from BlockSuite presets to AFFiNE core
- Removed basic editor examples from playground
- Updated import paths across the codebase to reference new component locations
- Added editor effects registration in AFFiNE core
- Removed editor exports from BlockSuite presets
### How to test?
1. Launch the application
2. Verify both page and edgeless editors load correctly
3. Confirm editor functionality remains intact including:
- Document editing
- Mode switching
- Editor toolbars and controls
- Multiple editor instances
### Why make this change?
This change better aligns with AFFiNE's architecture by moving editor components closer to where they are used. It reduces coupling with BlockSuite presets and gives AFFiNE more direct control over editor customization and implementation.
Close [BS-2315](https://linear.app/affine-design/issue/BS-2315/page-block-header)
### What Changes
- Add header toolbar to page block (the first note in canvas)
- Add e2e tests
- Add some edgeless e2e test utils. **The package `@blocksuite/affine` was added to `"@affine-test/kit"`**
