Keyboard navigation for plan site

Acceptance Criteria

• / focuses the search/filter bar
• Escape clears filter and unfocuses search bar
• j/k moves to next/previous item in sidebar
• Enter navigates to the focused item
• [/] jumps to previous/next entity type group
• o toggles collapse of the focused group
• Visual focus indicator matches the active link style
• Shortcuts don't fire when typing in the search input (except Escape)

Approach

A keyboard-nav behavior. Sidebar items get tabindex attributes. The behavior manages a virtual focus cursor and delegates to existing collapse/filter behaviors.

Once WORK-050 converges the plan renderer with the shared layout engine, this behavior can be registered in the planLayout.behaviors array (like mobile-menu and search in docsLayout), removing the need for inline script injection.

References

• Plan Site UX at Scale (Plan Site UX at Scale — Feature 5)
• Collapsible status groups in plan sidebar (collapsible groups — o key integration)
• Sidebar search and filter bar for plan site (search bar — / key integration)
• Converge plan site renderer with shared layout engine (renderer convergence — enables behaviors array registration)