git_graph: Show full commit message in tooltip on hover (#57032)

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes #56903 

Release Notes:

- Improved commit tooltip in Git Graph.

## Screenshots

Showing full commit message:

<img width="3024" height="1898" alt="CleanShot 2026-05-17 at 21 59
35@2x"
src="https://github.com/user-attachments/assets/503ca832-fc07-4f90-961f-a9c4e25fcba2"
/>

Truncating messages with more than 800 characters:

<img width="1536" height="1096" alt="CleanShot 2026-05-17 at 22 12 07"
src="https://github.com/user-attachments/assets/314be9a9-0aaa-44ff-aa15-de5eb38c863a"
/>


## Alternative

One thing I was considering is whether we should be using a
`HoverPopover` instead so that the preview is wider and we don't have to
truncate the commit message body. I would love to hear your thoughts on
this. For now, I stuck with the `Tooltip` for simplicity reasons.

<img width="3024" height="1896" alt="CleanShot 2026-05-17 at 22 04
39@2x"
src="https://github.com/user-attachments/assets/5b8806f6-3dce-4675-9150-df9257ad6269"
/>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>

crates/git_ui/src/commit_tooltip.rs

@@ -299,11 +299,10 @@ impl Render for CommitTooltip {
                 .child(
                     v_flex()
                         .w(gpui::rems(30.))
-                        .gap_4()
                         .child(
                             h_flex()
-                                .pb_1p5()
-                                .gap_x_2()
+                                .pb_1()
+                                .gap_2()
                                 .overflow_x_hidden()
                                 .flex_wrap()
                                 .child(avatar)
@@ -321,23 +320,24 @@ impl Render for CommitTooltip {
                         .child(
                             div()
                                 .id("inline-blame-commit-message")
-                                .child(message)
+                                .track_scroll(&self.scroll_handle)
+                                .py_1p5()
                                 .max_h(message_max_height)
                                 .overflow_y_scroll()
-                                .track_scroll(&self.scroll_handle),
+                                .child(message),
                         )
                         .child(
                             h_flex()
                                 .text_color(cx.theme().colors().text_muted)
                                 .w_full()
                                 .justify_between()
-                                .pt_1p5()
+                                .pt_1()
                                 .border_t_1()
                                 .border_color(cx.theme().colors().border_variant)
                                 .child(absolute_timestamp)
                                 .child(
                                     h_flex()
-                                        .gap_1p5()
+                                        .gap_1()
                                         .when_some(pull_request, |this, pr| {
                                             this.child(
                                                 Button::new(
@@ -347,9 +347,9 @@ impl Render for CommitTooltip {
                                                 .color(Color::Muted)
                                                 .start_icon(
                                                     Icon::new(IconName::PullRequest)
+                                                        .size(IconSize::Small)
                                                         .color(Color::Muted),
                                                 )
-                                                .style(ButtonStyle::Subtle)
                                                 .on_click(move |_, _, cx| {
                                                     cx.stop_propagation();
                                                     cx.open_url(pr.url.as_str())
@@ -362,10 +362,11 @@ impl Render for CommitTooltip {
                                                 "commit-sha-button",
                                                 short_commit_id.clone(),
                                             )
-                                            .style(ButtonStyle::Subtle)
                                             .color(Color::Muted)
                                             .start_icon(
-                                                Icon::new(IconName::FileGit).color(Color::Muted),
+                                                Icon::new(IconName::FileGit)
+                                                    .size(IconSize::Small)
+                                                    .color(Color::Muted),
                                             )
                                             .on_click(
                                                 move |_, window, cx| {