feat: pr tab switching btwn body/diff

src/theme/catppuccin.rs

@@ -1,4 +1,5 @@
 use crate::colors::{hex, hex_alpha};
+use gpui::{linear_color_stop, linear_gradient};
 
 use super::{
     Theme, ThemeColors, ThemeMode, ThemeSyntaxHighlight,
@@ -44,6 +45,11 @@ pub(crate) fn latte() -> Theme {
             background: hex(0xeff1f5),
             surface: hex(0xe6e9ef),
             surface_elevated: hex(0xeff1f5),
+            surface_button: linear_gradient(
+                180.,
+                linear_color_stop(hex(0xf6f7fb), 0.),
+                linear_color_stop(hex(0xeff1f5), 1.),
+            ),
             surface_chrome: hex(0xdce0e8),
             surface_hover: hex(0xdce0e8),
             surface_active: hex(0xccd0da),
@@ -153,6 +159,11 @@ pub(crate) fn mocha() -> Theme {
             background: hex(0x1e1e2e),
             surface: hex(0x181825),
             surface_elevated: hex(0x45475a),
+            surface_button: linear_gradient(
+                180.,
+                linear_color_stop(hex(0x4f5068), 0.),
+                linear_color_stop(hex(0x45475a), 1.),
+            ),
             surface_chrome: hex(0x11111b),
             surface_hover: hex(0x313244),
             surface_active: hex(0x45475a),