feat: add maxHeight prop with sectionContent wrapper to SidebarSection

Adds position and maxHeight to SidebarSectionProps and wraps children in a .sectionContent div when the section is open, enabling scrollable constrained height via inline style.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/design-system/layout/Sidebar/Sidebar.test.tsx

@@ -324,4 +324,73 @@ describe('Sidebar compound component', () => {
     const item = screen.getByText('Admin').closest('[role="button"]')!
     expect(item.className).toMatch(/bottomItemActive/)
   })
+
+  // 17. renders sectionContent wrapper with maxHeight when open
+  it('renders section content wrapper with maxHeight style when open', () => {
+    const { container } = render(
+      <Wrapper>
+        <Sidebar>
+          <Sidebar.Section
+            icon={<span>ic</span>}
+            label="Apps"
+            open
+            onToggle={vi.fn()}
+            maxHeight="200px"
+          >
+            <div>child</div>
+          </Sidebar.Section>
+        </Sidebar>
+      </Wrapper>,
+    )
+
+    const contentWrapper = container.querySelector('.sectionContent')
+    expect(contentWrapper).toBeInTheDocument()
+    expect(contentWrapper).toHaveStyle({ maxHeight: '200px' })
+    expect(screen.getByText('child')).toBeInTheDocument()
+  })
+
+  // 18. renders sectionContent wrapper without maxHeight when not provided
+  it('renders section content wrapper without inline maxHeight when maxHeight is not provided', () => {
+    const { container } = render(
+      <Wrapper>
+        <Sidebar>
+          <Sidebar.Section
+            icon={<span>ic</span>}
+            label="Apps"
+            open
+            onToggle={vi.fn()}
+          >
+            <div>child</div>
+          </Sidebar.Section>
+        </Sidebar>
+      </Wrapper>,
+    )
+
+    const contentWrapper = container.querySelector('.sectionContent')
+    expect(contentWrapper).toBeInTheDocument()
+    expect(contentWrapper).not.toHaveStyle({ maxHeight: '200px' })
+    expect(screen.getByText('child')).toBeInTheDocument()
+  })
+
+  // 19. does not render sectionContent wrapper when section is closed
+  it('does not render section content wrapper when section is closed', () => {
+    const { container } = render(
+      <Wrapper>
+        <Sidebar>
+          <Sidebar.Section
+            icon={<span>ic</span>}
+            label="Apps"
+            open={false}
+            onToggle={vi.fn()}
+            maxHeight="200px"
+          >
+            <div>child</div>
+          </Sidebar.Section>
+        </Sidebar>
+      </Wrapper>,
+    )
+
+    const contentWrapper = container.querySelector('.sectionContent')
+    expect(contentWrapper).not.toBeInTheDocument()
+  })
 })

src/design-system/layout/Sidebar/Sidebar.tsx

@@ -26,6 +26,8 @@ interface SidebarSectionProps {
   active?: boolean
   children: ReactNode
   className?: string
+  position?: 'top' | 'bottom'
+  maxHeight?: string
 }
 
 interface SidebarFooterProps {
@@ -83,6 +85,8 @@ function SidebarSection({
   active,
   children,
   className,
+  position: _position,
+  maxHeight,
 }: SidebarSectionProps) {
   const { collapsed, onCollapseToggle } = useSidebarContext()
 
@@ -125,7 +129,14 @@ function SidebarSection({
         {icon && <span className={styles.sectionIcon}>{icon}</span>}
         <span className={styles.treeSectionLabel}>{label}</span>
       </div>
-      {open && children}
+      {open && (
+        <div
+          className={styles.sectionContent}
+          style={maxHeight ? { maxHeight } : undefined}
+        >
+          {children}
+        </div>
+      )}
     </div>
   )
 }