This change introduces a "Stylus Only Mode" toggle in the annotation dock, allowing users to restrict drawing input to stylus pens while maintaining touch support for scrolling and navigation.
Key changes include:
- Added `isStylusOnlyMode` state and persistence logic in `PdfViewerScreen`.
- Updated `AnnotationDock` with a toggle button for the new mode.
- Modified pointer input handling in `PdfPageComposable` and `PdfVerticalReader` to filter touch events when stylus-only mode is active.
- Adjusted tap gesture detection to ensure scrolling and page clicks still function correctly under various input modes.
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