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
On history react, when the initial screen has been loaded, no default pathname is selected. This PR adds logic for selecting default pathname and getting the diff for that pathname.
Also, add some other small changes, the notable ones are:
- Refactor some type naming and file structure related to the history file tree
- Refactor file tree selectable hooks (merge selectable context provider into the main provider)
- prevent clicking on the same file tree item by checking the current pathname before invoking the handler function
GitOrigin-RevId: 73c36e9ed918ae3d92dd47108fbe8542a7571bdd
