Who could've guessed that saving the device info in the ndjsons with absolute paths would be a bad idea

.idea/.idea.NetworkDiagram/.idea/vcs.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

NetworkDiagram/MainWindow.xaml

@@ -52,8 +52,8 @@
                 
                 <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
                     <ComboBox x:Name="LangCombo" VerticalAlignment="Center" Width="80" SelectionChanged="LangCombo_SelectionChanged" Margin="10,0,0,0">
-                        <ComboBoxItem Tag="en">EN</ComboBoxItem>
+                        <ComboBoxItem Tag="en" IsSelected="True">EN</ComboBoxItem>
-                        <ComboBoxItem Tag="cs" IsSelected="True">CZ</ComboBoxItem>
+                        <ComboBoxItem Tag="cs">CZ</ComboBoxItem>
                     </ComboBox>
                 </StackPanel>
             </DockPanel>

NetworkDiagram/MainWindow.xaml.cs

@@ -100,7 +100,7 @@ namespace NetworkDiagram
 
         private void AddDeviceToCanvas(DeviceTemplate template, double x, double y)
         {
-            var placed = new PlacedDevice { Name = template.Name, IconPath = template.IconPath, X = x, Y = y };
+            var placed = new PlacedDevice { Name = template.Name, TemplateName = template.Name, IconPath = template.IconPath, X = x, Y = y };
             _currentDiagram.Devices.Add(placed);
             RenderDevice(placed);
         }
@@ -445,6 +445,13 @@ namespace NetworkDiagram
                 var model = JsonSerializer.Deserialize<DiagramSaveModel>(json);
                 if (model == null) return;
                 _currentDiagram = new Diagram { Devices = model.Devices };
+
+                foreach (var device in _currentDiagram.Devices)
+                {
+                    var template = _deviceTemplates.FirstOrDefault(t => t.Name == device.TemplateName);
+                    if (template != null) device.IconPath = template.IconPath;
+                }
+
                 DiagramCanvas.Children.Clear();
                 _connectionLines.Clear();
                 _deviceElements.Clear();

NetworkDiagram/Models/DiagramModels.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Runtime.CompilerServices;
+using System.Text.Json.Serialization;
 
 namespace NetworkDiagram.Models
 {
@@ -30,6 +31,9 @@ namespace NetworkDiagram.Models
             set { _name = value; OnPropertyChanged(); } 
         }
 
+        public string TemplateName { get; set; } = string.Empty;
+
+        [JsonIgnore]
         public string IconPath { get; set; } = string.Empty;
 
         public double X