Move missing font detection to ConfigManager

Author: AndisGrossteins

src/LogExpert.UI/Controls/LogWindow/LogWindow.cs

@@ -7179,20 +7179,7 @@ public void PreferencesChanged (string fontName, float fontSize, bool setLastCol
     {
         if ((flags & SettingsFlags.GuiOrColors) == SettingsFlags.GuiOrColors)
         {
-            Font NormalFont;
-
-            try
-            {
-                NormalFont = new Font(new FontFamily(fontName), fontSize);
-            }
-            catch (ArgumentException ex)
-            {
-                _logger.Warn($"Specified font '{fontName}' not found. Falling back to default. {ex.Message}");
-                // NOTE: Checking for invalid font name and falling back to default font might belong in LogExpert.Config.ConfigManager
-                NormalFont = new Font(FontFamily.GenericMonospace, fontSize);
-                Preferences.FontName = NormalFont.Name;
-            }
-            
+            NormalFont = new Font(new FontFamily(fontName), fontSize);
             BoldFont = new Font(NormalFont, FontStyle.Bold);
             MonospacedFont = new Font("Courier New", Preferences.FontSize, FontStyle.Bold);
 

src/LogExpert/Config/ConfigManager.cs

@@ -204,6 +204,17 @@ private Settings LoadOrCreateNew (FileInfo fileInfo)
 
             settings.FileColors ??= [];
 
+            try
+            {
+                var fontFamily = new FontFamily(settings.Preferences.FontName);
+                settings.Preferences.FontName = fontFamily.Name;
+            }
+            catch (ArgumentException ex)
+            {
+                _logger.Warn($"Specified font '{settings.Preferences.FontName}' not found. Falling back to default: '{FontFamily.GenericMonospace.Name}'. {ex.Message}");
+                settings.Preferences.FontName = FontFamily.GenericMonospace.Name;
+            }
+
             if (settings.Preferences.ShowTailColor == Color.Empty)
             {
                 settings.Preferences.ShowTailColor = Color.FromKnownColor(KnownColor.Blue);