[chore:] code cleanup by IDE

MainWindow.axaml.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.IO;
 using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
@@ -13,10 +14,10 @@ public partial class MainWindow : Window
 {
     public static MainWindow _instance;
 
-        private WikiService _wikiService;
-
     private Country _selectedCountry;
     private bool _suppressCountryRefresh;
+
+    private WikiService _wikiService;
     public Uri filePath;
 
     public MainWindow()
@@ -49,15 +50,21 @@ public partial class MainWindow : Window
                 if (!string.IsNullOrWhiteSpace(Global._instance.wiki_storage_path))
                     TbWikiPath.Text = Global._instance.wiki_storage_path;
             }
-            catch { }
+            catch
+            {
+            }
 
             try
             {
-                BtnWikiChoose.Click += BtnWikiChoose_Click;
+                BtnWikiPath.Click += BtnWikiPath_Click;
             }
-            catch { }
+            catch
+            {
+            }
+        }
+        catch
+        {
         }
-        catch { }
 
         //Thread.Sleep(3000);
         //Show();
@@ -234,6 +241,7 @@ public partial class MainWindow : Window
                 PreviewPanel.Children.Clear();
                 PreviewPanel.Children.Add(new TextBlock { Text = text ?? string.Empty });
             }
+
             EditButton.IsEnabled = true;
         }
     }
@@ -250,38 +258,36 @@ public partial class MainWindow : Window
     {
         var node = new TreeViewItem { Header = item.Name, Tag = item };
         if (item.IsFolder)
-        {
             foreach (var c in item.Children)
-            {
                 node.Items.Add(BuildNode(c));
-            }
-        }
 
         return node;
     }
 
     private void OpenFolderButton_Click(object? sender, RoutedEventArgs e)
     {
-        var path = _wikiService.WikiRootFullPath;
+        var path = Global._instance.wiki_storage_path;
-        if (!System.IO.Directory.Exists(path)) return;
+        if (!Directory.Exists(path)) return;
 
         try
         {
-            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo
+            Process.Start(new ProcessStartInfo
             {
                 FileName = path,
                 UseShellExecute = true
             });
         }
-        catch { }
+        catch
+        {
+        }
     }
 
-    private async void BtnWikiChoose_Click(object? sender, RoutedEventArgs e)
+    private async void BtnWikiPath_Click(object? sender, RoutedEventArgs e)
     {
         var top = GetTopLevel(this);
-        var folder = await top.StorageProvider.OpenFolderPickerAsync(new Avalonia.Platform.Storage.FolderPickerOpenOptions
+        var folder = await top.StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions
         {
-            Title = "Choose wiki folder",
+            Title = "Wiki Pfad wählen",
             AllowMultiple = false
         });
 
@@ -406,6 +412,7 @@ public partial class MainWindow : Window
     {
         await MessageBox.Show(this, "Edit feature is currently disabled.", "Edit Disabled");
     }
+
     public void RefreshCustomerItems(int index = 0)
     {
         if (LstCustomers.Items.Count > 0)