ui: remove horizontal pane gutter

Author: benvinegar

src/ui/components/panes/DiffPane.tsx

@@ -247,7 +247,8 @@ export function DiffPane({
         border: pagerMode ? [] : ["top"],
         borderColor: theme.border,
         backgroundColor: theme.panel,
-        padding: pagerMode ? 0 : 1,
+        paddingY: pagerMode ? 0 : 1,
+        paddingX: 0,
         flexDirection: "column",
       }}
     >

src/ui/components/panes/FilesPane.tsx

@@ -31,7 +31,8 @@ export function FilesPane({
         border: ["top"],
         borderColor: theme.border,
         backgroundColor: theme.panel,
-        padding: 1,
+        paddingY: 1,
+        paddingX: 0,
         flexDirection: "column",
       }}
     >