- Add master catalog (bambuLabCatalog.ts) as single source of truth for materials, finishes, colors, and refill/spool availability
- Fix incorrect finish-per-material mappings (remove PLA: 85A/90A/95A HF/FR/GF/HF, add ASA: Basic/CF/Aero, fix PETG/PC)
- Implement cascading filters on public site: material restricts finish, finish restricts color
- Add AdminSidebar component across all admin pages
- Redirect /upadaj to /dashboard when already authenticated
- Update color hex mappings and tests to match official Bambu Lab names
- Add customers table (021) and sales/sale_items tables (022) migrations
- Add customer CRUD, sale CRUD (transactional with auto inventory decrement/restore),
and analytics API endpoints (overview, top sellers, revenue chart, inventory alerts)
- Add sales page with NewSaleModal (customer autocomplete, multi-item form,
color-based pricing, stock validation) and SaleDetailModal
- Add customers page with search, inline editing, and purchase history
- Add analytics dashboard with recharts (revenue line chart, top sellers bar,
refill vs spulna pie chart, inventory alerts table with stockout estimates)
- Add customerService, saleService, analyticsService to frontend API layer
- Update sidebar navigation on all admin pages
