DB integration added, multiple images for equipment

Models/Property.cs

@@ -1,5 +1,4 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 using System.Text.Json.Serialization;
@@ -12,17 +11,29 @@ public class Property
     [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
     [JsonIgnore]
     public int Id { get; set; }
-    [JsonIgnore]
-    public int ParentId { get; set; }
+    
     [Required]
     public string Name { get; set; } = string.Empty;
     public string Value { get; set; } = string.Empty;
-    // EF stuff
+    
+    // For self-referencing hierarchy (Property of a Property)
+    [JsonIgnore]
+    public int? ParentPropertyId { get; set; }
     [JsonIgnore]
     public Property? Parent { get; set; }
-    public List<Property> Properties{ get; set; } = [];
+
+    // For a Property of a Point
     [JsonIgnore]
-    public List<Point> Points { get; set; } = [];
+    public int? PointId { get; set; }
     [JsonIgnore]
-    public List<Equipment> Equipment { get; } = [];
+    public Point? Point { get; set; }
+
+    // For a Property of an Equipment
+    [JsonIgnore]
+    public int? EquipmentId { get; set; }
+    [JsonIgnore]
+    public Equipment? Equipment { get; set; }
+
+    // Child properties in the hierarchy
+    public List<Property> Properties { get; set; } = [];
 }