feat(ui): add solid background color option for input prompt (#16563)

Co-authored-by: Alexander Farber <farber72@outlook.de>

packages/cli/src/ui/components/MainContent.tsx

@@ -129,6 +129,7 @@ export const MainContent = () => {
     return (
       <ScrollableList
         hasFocus={!uiState.isEditorDialogOpen}
+        width={uiState.terminalWidth}
         data={virtualizedData}
         renderItem={renderItem}
         estimatedItemHeight={() => 100}