feat(cli): improve CTRL+O experience for both standard and alternate screen buffer (ASB) modes (#19010)

Co-authored-by: jacob314 <jacob314@gmail.com>

packages/cli/src/ui/components/messages/ToolResultDisplayOverflow.test.tsx

@@ -39,6 +39,7 @@ describe('ToolResultDisplay Overflow', () => {
           toolCalls={toolCalls}
           availableTerminalHeight={15} // Small height to force overflow
           terminalWidth={80}
+          isExpandable={true}
         />
       </OverflowProvider>,
       {
@@ -46,26 +47,28 @@ describe('ToolResultDisplay Overflow', () => {
           streamingState: StreamingState.Idle,
           constrainHeight: true,
         },
-        useAlternateBuffer: false,
+        useAlternateBuffer: true,
       },
     );
 
     // ResizeObserver might take a tick
     await waitFor(() =>
-      expect(lastFrame()).toContain('Press ctrl-o to show more lines'),
+      expect(lastFrame()?.toLowerCase()).toContain(
+        'press ctrl+o to show more lines',
+      ),
     );
 
     const frame = lastFrame();
     expect(frame).toBeDefined();
     if (frame) {
-      expect(frame).toContain('Press ctrl-o to show more lines');
+      expect(frame.toLowerCase()).toContain('press ctrl+o to show more lines');
       // Ensure it's AFTER the bottom border
       const linesOfOutput = frame.split('\n');
       const bottomBorderIndex = linesOfOutput.findLastIndex((l) =>
         l.includes('╰─'),
       );
       const hintIndex = linesOfOutput.findIndex((l) =>
-        l.includes('Press ctrl-o to show more lines'),
+        l.toLowerCase().includes('press ctrl+o to show more lines'),
       );
       expect(hintIndex).toBeGreaterThan(bottomBorderIndex);
       expect(frame).toMatchSnapshot();