Split 1200+ line file into clean modular architecture:
- FocusAreaNode.jsx - Tree nodes with nested style directions + training types
- HierarchyTab.jsx - Tab 1 with tree view and detail panel
- CatalogsTab.jsx - Tab 2 with global catalogs (Target Groups, Skill Categories, Training Characters)
- AssignmentsTab.jsx - Tab 3 with M:N checkbox matrix (Style Directions ↔ Target Groups)
- DetailPanel.jsx - All edit forms (Focus Area, Style Direction, Training Type) + create forms
Fixes ESBuild parser error from large file size.
Implements full CRUD: create, edit, delete, reassign focus areas.
Responsive design with mobile/desktop layouts.
Design System:
- app.css already exists with full design tokens, dark mode, responsive breakpoints
- CSS variables for colors, spacing, typography
- Mobile-first layout with safe-area support (iOS notch)
Navigation System:
- config/appNav.js: Single source of truth for navigation items
- Bottom-Nav for mobile (<1024px) with horizontal scrolling
- DesktopSidebar for desktop (≥1024px) with fixed left sidebar
- Role-based navigation (isAdmin adds Admin link)
App.jsx Restructure:
- Responsive layout: Bottom-Nav (mobile) + DesktopSidebar (desktop)
- Protected/Public routes with loading states
- Logout handler with confirmation
PWA Setup:
- viewport-fit=cover for notch support
- apple-mobile-web-app meta tags
- Icon links prepared (icons pending)
Architecture:
- Follows Mitai design patterns
- Responsive breakpoint at 1024px
- Single source of truth for navigation config
Next: Icons, Exercise CRUD, Clubs/Groups Management
