feat: default diffs to branch changes

src/tui.rs

@@ -2343,7 +2343,7 @@ fn draw_diff(
         } else {
             "After"
         };
-        let title = format!(" Diff · Choose {stage} ");
+        let title = format!(" Diff · Choose {stage} · {} ", diff.comparison_mode.label());
         let content = diff_panel(frame, panel, &title, "", "", true);
         let notice = diff.error.as_deref().or_else(|| {
             if diff.loading {
@@ -2381,7 +2381,11 @@ fn draw_diff(
             .as_ref()
             .map_or("not selected", |revision| revision.label.as_str());
         frame.render_widget(
-            Paragraph::new(format!("Choose {stage} · Before: {}", display_text(before))),
+            Paragraph::new(format!(
+                "{} · Ctrl+b toggle · Before: {}",
+                diff.comparison_mode.label(),
+                display_text(before)
+            )),
             stage_area,
         );
         if let Some(catalog) = &diff.catalog {
@@ -2869,7 +2873,7 @@ fn diff_pane_panel(
         return area;
     }
     let title = file.map_or_else(
-        || " Diff ".into(),
+        || format!(" Diff · {} ", diff.comparison_mode.label()),
         |file| {
             let label = if diff.view_mode == ViewMode::Unified {
                 if before {
@@ -2888,9 +2892,10 @@ fn diff_pane_panel(
                 &file.path
             };
             format!(
-                " {label} · {} · {} ",
+                " {label} · {} · {} · {} ",
                 diff_status(file.status),
-                display_text(&path.to_string_lossy())
+                display_text(&path.to_string_lossy()),
+                diff.comparison_mode.label()
             )
         },
     );
@@ -5179,7 +5184,9 @@ mod tests {
         assert!(text.contains("> commit-19"));
         diff.handle(Input::Enter);
         render_diff(&mut terminal, &diff, &mut panels);
-        assert!(screen_text(&terminal).contains("Choose After · Before: commit-19"));
+        let text = screen_text(&terminal);
+        assert!(text.contains("Choose After"));
+        assert!(text.contains("Branch changes · Ctrl+b toggle · Before: commit-19"));
         assert!(screen_text(&terminal).contains("Tab categories"));
         assert!(screen_text(&terminal).contains("Enter select"));
         diff.handle(Input::Ctrl('u'));