Implement complete e-commerce functionality with shipping and order management

Features Added:
- Standard e-commerce properties (Price, Weight, shipping fields)
- Order management with Create/Edit views and shipping information
- ShippingRates system for weight-based shipping calculations
- Comprehensive test coverage with JWT authentication tests
- Sample data seeder with 5 orders demonstrating full workflow
- Photo upload functionality for products
- Multi-cryptocurrency payment support (BTC, XMR, USDT, etc.)

Database Changes:
- Added ShippingRates table
- Added shipping fields to Orders (Name, Address, City, PostCode, Country)
- Renamed properties to standard names (BasePrice to Price, ProductWeight to Weight)
- Added UpdatedAt timestamps to models

UI Improvements:
- Added Create/Edit views for Orders
- Added ShippingRates management UI
- Updated navigation menu with Shipping option
- Enhanced Order Details view with shipping information

Sample Data:
- 3 Categories (Electronics, Clothing, Books)
- 5 Products with various prices
- 5 Shipping rates (Royal Mail options)
- 5 Orders in different statuses (Pending to Delivered)
- 3 Crypto payments demonstrating payment flow

Security:
- All API endpoints secured with JWT authentication
- No public endpoints - client apps must authenticate
- Privacy-focused design with minimal data collection

Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop/Models/Order.cs

@@ -0,0 +1,62 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using LittleShop.Enums;
+
+namespace LittleShop.Models;
+
+public class Order
+{
+    [Key]
+    public Guid Id { get; set; }
+    
+    [Required]
+    [StringLength(100)]
+    public string IdentityReference { get; set; } = string.Empty;
+    
+    public OrderStatus Status { get; set; } = OrderStatus.PendingPayment;
+    
+    [Column(TypeName = "decimal(18,2)")]
+    public decimal TotalAmount { get; set; }
+    
+    [StringLength(10)]
+    public string Currency { get; set; } = "GBP";
+    
+    // Shipping Information
+    [Required]
+    [StringLength(200)]
+    public string ShippingName { get; set; } = string.Empty;
+    
+    [Required]
+    [StringLength(500)]
+    public string ShippingAddress { get; set; } = string.Empty;
+    
+    [Required]
+    [StringLength(100)]
+    public string ShippingCity { get; set; } = string.Empty;
+    
+    [Required]
+    [StringLength(20)]
+    public string ShippingPostCode { get; set; } = string.Empty;
+    
+    [Required]
+    [StringLength(100)]
+    public string ShippingCountry { get; set; } = "United Kingdom";
+    
+    [StringLength(500)]
+    public string? Notes { get; set; }
+    
+    [StringLength(100)]
+    public string? TrackingNumber { get; set; }
+    
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+    
+    public DateTime? PaidAt { get; set; }
+    
+    public DateTime? ShippedAt { get; set; }
+    
+    // Navigation properties
+    public virtual ICollection<OrderItem> Items { get; set; } = new List<OrderItem>();
+    public virtual ICollection<CryptoPayment> Payments { get; set; } = new List<CryptoPayment>();
+}