c298b23b35
Add API endpoints for the POS module: - GET/POST /api/products/categories - List and create product categories - GET/POST /api/products - List products with filters and create new products - GET/PUT/DELETE /api/products/[id] - CRUD operations for individual products - POST /api/products/[id]/stock - Adjust product stock with validation Features include: - Zod validation for all inputs - Organization-scoped access control - Low stock indicator (stock < minStock) - Soft delete for products (isActive = false) - Stock adjustment with reason tracking Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>