# Objective

- "Go back" behaved inconsistently when navigating from the Git Graph
view: opening a commit diff (double-click on a commit) and then using
"Go Back" would not return to the Git Graph — instead it jumped to
whatever file was open before the Git Graph was opened.
- Fixes #63293

## Solution

- `GitGraph`'s `Item` implementation never hooked into the pane's
navigation history (missing `deactivated` / `set_nav_history`), unlike
every sibling diff view (`CommitView`, `ProjectDiffEditor`,
`MultiDiffView`, `BranchDiff`). Because of this, when a commit diff was
opened on top of it, deactivating Git Graph never pushed an entry onto
the pane's back-stack, so "Go Back" skipped straight past it to the
previously active file.
- Added a `nav_history: Option<ItemNavHistory>` field to `GitGraph` and
implemented `set_nav_history`/`deactivated` to push a nav-history entry
when the Git Graph tab is deactivated, matching the pattern used by
other `git_ui` diff views.

## Testing

- Added `test_go_back_from_commit_view_returns_to_git_graph` in
`crates/git_ui/src/git_graph.rs`, which opens a file, then Git Graph,
then a commit diff, and asserts that `Pane::navigate_backward` returns
to the Git Graph view rather than the file.
- Verified the test actually catches the regression by temporarily
reverting the fix and confirming the test fails, then restoring the fix
and confirming it passes.
- `cargo test -p git_ui --lib git_graph::` — all 28 tests pass.
- `./script/clippy -p git_ui` — clean, no warnings.

## Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] The content adheres to Zed's UI standards
([UX/UI](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
and
[icon](https://github.com/zed-industries/zed/blob/main/crates/icons/README.md)
guidelines)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

## Showcase

<details>
  <summary>Click to view showcase</summary>


Open the Git Graph and double click on any commit to see the details,
after that press go back button, it should return to the Git Graph
instead of previos opened file.



https://github.com/user-attachments/assets/15f659a7-a60b-4d43-ad59-8be69a94cb31

</details>

---

Release Notes:

- Fixed "Go Back" not returning to the Git Graph view after opening a
commit diff