* Add strikethrough to deleted file tree item in history file tree
* Add "restore file" button on toolbar if the selected file have a `removed` operation.
* Implement "restore file" functionality on removed file:
- Refactor the `Selection` object in history context value since we need the `deletedAtV` data which currently is not passed through the state.
- Refactor and clean up file tree type system to support passing through the whole `FileDiff` object for getting the `deletedAtV` data which only appear on `removed` operation
- Implement `postJSON` with file restoration API and pass it on restore file onClick handler at toolbar
* Implement loading behaviour while restoring file is inflight:
- Add `loadingRestoreFile` to `LoadingState`
- Change restore file button to `Restoring...` when in loading state.
* Refactor:
- Rename `DiffOperation` to `FileOperation`
- Extract `isFileRemoved` and `isFileRenamed` to its own file
- Extract `Toolbar` components into small files
GitOrigin-RevId: 2e32ebd2165f73fc6533ff282a9c084162efd682
There are two different UI in this PR: `comparing` and `viewing` mode.
- For `comparing`, the user would be shown two separate date. It uses the `UpdateRange` object and this PR adds a timestamp to both `fromV` and `toV` of the object type.
- For `viewing`, the user would only be shown one date since `viewing` mode means viewing a specific update version.
Some other notable changes:
- Move `diff` state to `diff-view.tsx`, which contains `main.tsx` (main editor history view) and `toolbar.tsx` as its children
- refactor `autoSelectFile` by passing `updateRange.toV` directly
- refactor `updateIsSelected` by passing an object that contains `fromV` and `toV` instead of passing `update
There's also a cypress test for both the `viewing` mode and `comparing` mode in this PR.
GitOrigin-RevId: ba54f073f3479c55a39eb6b2932ea7faff78dddc
