Close [BS-3159](https://linear.app/affine-design/issue/BS-3159/输入法自带的键盘收起操作后-占位符还留着)
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## Summary by CodeRabbit
- **Bug Fixes**
- The toolbar now automatically closes when the keyboard is dismissed and no panel is open, ensuring smoother user experience.
- Improved cleanup to prevent delayed actions after the toolbar is closed, enhancing stability.
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<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Improved file selection dialogs for attachments, imports, and uploads, allowing for more consistent and streamlined file picking across the app.
- **Bug Fixes**
- Resolved inconsistencies when selecting single or multiple files, ensuring a smoother user experience during file import and upload.
- **Refactor**
- Unified and simplified file selection logic throughout the app for better reliability and maintainability.
- Standardized import functions to uniformly handle arrays of files, enhancing consistency in file processing.
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<!-- 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.
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Closes: BS-3223
Closes: BS-3224
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced new view extensions for frame title and keyboard toolbar widgets with conditional registration based on context and environment.
- Enhanced widget integration by adding explicit exports for view components.
- **Chores**
- Updated export paths and package dependencies to improve modularity and compatibility.
- Removed deprecated widget dependencies and related imports from core packages.
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