Ports crewli-starter's sidebar nav into the SPA as production TS:
V2NavGroup/V2NavItem types, a pure toV2NavGroups adapter wrapped by
useV2Nav(items) (composables zone can't import @/navigation, so the
v1 nav array is passed in — the layout supplies orgNavItems in Task 7),
a pure isNavItemActive helper, and SidebarNav.vue (props-only,
router-driven nav, route-based active state, collapsed mode, main.css
translated to Tailwind inline). 16 unit tests. Icon import is
allowed via the components-foundation bridge (no eslint-disable).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>