fix: improve diagnostics logging and log copy

LiamWorkflowDiagnostics/MainWindow.xaml

@@ -479,6 +479,8 @@
                 </Grid.RowDefinitions>
                 <TextBlock x:Name="StatusTextBlock" Grid.Row="0" Margin="0,0,0,6" Foreground="Gray"/>
                 <ListBox x:Name="LogListBox" Grid.Row="1"
+                         SelectionMode="Extended"
+                         KeyDown="LogListBox_KeyDown"
                          ScrollViewer.VerticalScrollBarVisibility="Auto"
                          ScrollViewer.HorizontalScrollBarVisibility="Auto"
                          ScrollViewer.CanContentScroll="True"/>

LiamWorkflowDiagnostics/MainWindow.xaml.cs

@@ -7,6 +7,7 @@ using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Input;
 using System.IO;
 using C4IT.LIAM;
 using C4IT.Logging;
@@ -33,6 +34,7 @@ namespace LiamWorkflowDiagnostics
         private readonly ObservableCollection<string> _logEntries = new ObservableCollection<string>();
         private ProviderTestSession _session;
         private bool _isInitializingUi;
+        private dynamic _diagnosticsLogger;
         private readonly string _settingsPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "LiamWorkflowDiagnostics.settings.json");
 
         public MainWindow()
@@ -65,7 +67,7 @@ namespace LiamWorkflowDiagnostics
                 var logDirectory = Path.Combine(baseDir, "logs");
                 Directory.CreateDirectory(logDirectory);
                 var logPath = Path.Combine(logDirectory, "LiamWorkflowDiagnostics.log");
-                cLogManagerFile.CreateInstance(logPath);
+                _diagnosticsLogger = cLogManagerFile.CreateInstance(logPath);
                 cLogManager.Instance.Level = LogLevels.Debug;
                 AppendLog($"Logdatei: {logPath} (Level: Debug)");
             }
@@ -137,7 +139,8 @@ namespace LiamWorkflowDiagnostics
 
             try
             {
-                cLogManager.DefaultLogger?.LogEntry(level, message);
+                if (_diagnosticsLogger != null)
+                    _diagnosticsLogger.LogEntry(level, message);
             }
             catch { /* ignore */ }
         }
@@ -227,6 +230,35 @@ namespace LiamWorkflowDiagnostics
             AppendLog("Log gelöscht.", LogLevels.Debug);
         }
 
+        private void LogListBox_KeyDown(object sender, KeyEventArgs e)
+        {
+            if ((Keyboard.Modifiers & ModifierKeys.Control) != ModifierKeys.Control)
+                return;
+
+            if (e.Key == Key.A)
+            {
+                LogListBox.SelectAll();
+                e.Handled = true;
+                return;
+            }
+
+            if (e.Key != Key.C)
+                return;
+
+            var selectedLines = LogListBox.SelectedItems
+                .Cast<object>()
+                .Select(i => i?.ToString() ?? string.Empty)
+                .Where(i => !string.IsNullOrWhiteSpace(i))
+                .ToList();
+
+            if (selectedLines.Count == 0)
+                return;
+
+            Clipboard.SetText(string.Join(Environment.NewLine, selectedLines));
+            AppendLog($"Logzeilen in Zwischenablage kopiert: {selectedLines.Count}", LogLevels.Debug);
+            e.Handled = true;
+        }
+
         private void LoadSettings()
         {
             ToolSettings settings = null;