Replaces the 'coming soon' placeholder with a full library UI.
No backend changes needed — all existing endpoints and components
(KnowledgeBaseViewer, KnowledgeBaseModal) are reused.
Features:
- Article card grid (responsive auto-fill, min 240px per card)
- Category filter tabs (Procedure, Guide, Policy, Reference, General)
with live article counts; tabs only shown for populated categories
- Search bar — filters by title and description, client-side
- Inline viewer — clicking a card opens KnowledgeBaseViewer below
the grid; clicking again or pressing the close button collapses it
- Upload modal (editor/admin only) refreshes the grid on success
- Delete button on each card (editor/admin only) with confirmation
- Graceful empty states for no articles and no search results
- Loading and error states with retry
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- NavDrawer component: slide-in left drawer with backdrop, matches dark theme
- Nav items: Home, Reporting, Knowledge Base, Exports with color-coded icons
- Active page highlighted with colored background + indicator dot
- Placeholder pages for Reporting (amber), Knowledge Base (green), Exports (purple)
- Stats bar and three-column layout conditionally render on Home page only
- currentPage state drives all page switching
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
