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Joshen Lim
c7880e328f
## Context We've gotten some requests for a better markdown editing experience in the Explorer so this PR adds a proper live preview markdown editor, similar UX to how you'd edit notion or obsidian documents. Opting to use `lexical` as the main library to support this UI for its size and composability without going too low level like prose mirror <img width="933" height="452" alt="image" src="https://github.com/user-attachments/assets/7161ae6c-3dff-4b36-818f-01b5e573f121" /> Actual file changes are just this size excluding the package-lock <img width="150" height="39" alt="image" src="https://github.com/user-attachments/assets/bb01f2cf-8ef7-4daf-975b-614b2d817b54" /> ## Changes involved This adjusts the UX for markdown cells a little - Clicking on a markdown cell immediately allows you to edit - Instead of the existing behaviour which requires a double click to enter "Edit" state - Editing doesn't eject you into a monaco editor, but rather inline editor - Nicer transition - Clicking out of the cell persists the cell's content - No more "Cancel" or "Save" buttons ## To test - [ ] Verify that editing markdown cells are still working - [ ] Verify that tabs do get marked with unsaved changes if you edit a markdown cell <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit - **New Features** - Replaced the previous Markdown editing workflow with an always-visible inline editor. - Added rich Markdown editing for headings, lists, links, blockquotes, code blocks, inline code, and text formatting. - Changes are saved automatically when leaving the editor. - Markdown formatting shortcuts take precedence within the editor. - **Bug Fixes** - Avoids unnecessary saves when content has not changed. - **Tests** - Added coverage verifying Markdown formatting conversions remain consistent and repeatable. <!-- end of auto-generated comment: release notes by coderabbit.ai -->