fix: align Code return and sidebar collapse in the top row

tests/unit/title-bar.test.tsx

@@ -91,7 +91,7 @@ describe('TitleBar platform behavior', () => {
     expect(screen.queryByTestId('titlebar-logo')).not.toBeInTheDocument();
     expect(screen.queryByRole('img', { name: 'Makelore logo' })).not.toBeInTheDocument();
     expect(screen.queryByTestId('titlebar-project-context')).not.toBeInTheDocument();
-    expect(screen.getByRole('button', { name: '折叠侧栏' })).toBeEnabled();
+    expect(screen.queryByRole('button', { name: '折叠侧栏' })).not.toBeInTheDocument();
   });
 
   it('renders the painting title bar as a transparent overlay with the logo at the window edge', () => {
@@ -195,7 +195,7 @@ describe('TitleBar platform behavior', () => {
     fireEvent.click(pinButton);
     expect(useSettingsStore.getState().sidebarCollapsed).toBe(false);
     expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveStyle({ width: '171px', minWidth: '171px', flexBasis: '171px' });
-    expect(screen.getByRole('button', { name: '折叠侧栏' })).toBeEnabled();
+    expect(screen.queryByRole('button', { name: '折叠侧栏' })).not.toBeInTheDocument();
   });
 
   it('extends the ordinary titlebar sidebar surface during a hover preview', () => {