Fase 3: Implementación de Listings (Avisos) - Entidades, Repositorio, API y Frontend Wizard integración

src/SIGCM.Domain/Entities/Listing.cs

@@ -0,0 +1,17 @@
+namespace SIGCM.Domain.Entities;
+
+public class Listing
+{
+    public int Id { get; set; }
+    public int CategoryId { get; set; }
+    public int OperationId { get; set; }
+    public required string Title { get; set; }
+    public string? Description { get; set; }
+    public decimal Price { get; set; }
+    public string Currency { get; set; } = "ARS"; // ARS, USD
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    public string Status { get; set; } = "Draft"; // Draft, Published, Sold, Paused
+    public int? UserId { get; set; }
+    
+    // Navigation properties logic will be handled manually via repositories in Dapper
+}