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Add toolbar with maximize/minimize and close buttons to namespace detail drawer, matching Headlamp's native drawer behavior. Changes: - Add maximize/minimize button (⊡/⊟) to toggle drawer width - Maximized width: calc(100vw - 240px) to avoid covering sidebar - Normal width: 1000px - Add smooth transition animation (0.3s) - Add hover effects using MUI theme variables - Improve close button styling with hover state - Add accessibility labels and tooltips Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>