- Introduced `DocsPageSeparators` component to manage visual gaps between pages in the document editor.
- Updated `DocsBodyMarginMasks` to include dark mode support for improved styling.
- Refactored `DocsPageViewInner` to integrate new separators and margin masks, enhancing layout consistency.
- Adjusted layout constants to increase the gap between stacked pages for better visual separation.
- Improved test coverage for page flow calculations and layout metrics.
