first commit

RS_system/Models/Modulo.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Rs_system.Models;
+
+[Table("modulos")]
+public class Modulo
+{
+    [Key]
+    [Column("id")]
+    public int Id { get; set; }
+
+    [Column("nombre")]
+    [Required]
+    [StringLength(100)]
+    public string Nombre { get; set; } = string.Empty;
+
+    [Column("icono")]
+    [StringLength(50)]
+    public string? Icono { get; set; }
+
+    [Column("orden")]
+    public int Orden { get; set; } = 0;
+
+    [Column("activo")]
+    public bool Activo { get; set; } = true;
+
+    [Column("creado_en")]
+    public DateTime CreadoEn { get; set; } = DateTime.UtcNow;
+
+    [Column("parent_id")]
+    public int? ParentId { get; set; }
+
+    // Navigation properties
+    [ForeignKey("ParentId")]
+    public virtual Modulo? Parent { get; set; }
+    
+    public virtual ICollection<Modulo> SubModulos { get; set; } = new List<Modulo>();
+    
+    public virtual ICollection<Permiso> Permisos { get; set; } = new List<Permiso>();
+}