second commit

GreenshotMac/Core/Configuration.swift

@@ -110,7 +110,8 @@ final class Configuration {
             Keys.editorHighlightColor: "#FFFF00",
             Keys.editorDropShadow: false,
             Keys.showMagnifier: true,
-            Keys.showSelectionSize: true
+            Keys.showSelectionSize: true,
+            Keys.appearanceMode: AppearanceMode.system.rawValue
         ])
     }
 
@@ -138,6 +139,7 @@ final class Configuration {
         static let editorDropShadow = "EditorDropShadow"
         static let showMagnifier = "ShowMagnifier"
         static let showSelectionSize = "ShowSelectionSize"
+        static let appearanceMode = "AppearanceMode"
         static let hotkeyRegion = "HotkeyRegion"
         static let hotkeyFullscreen = "HotkeyFullscreen"
         static let hotkeyWindow = "HotkeyWindow"
@@ -208,6 +210,11 @@ final class Configuration {
         set { defaults.set(newValue, forKey: Keys.showSelectionSize) }
     }
 
+    var appearanceMode: AppearanceMode {
+        get { AppearanceMode(rawValue: defaults.string(forKey: Keys.appearanceMode) ?? "system") ?? .system }
+        set { defaults.set(newValue.rawValue, forKey: Keys.appearanceMode) }
+    }
+
     // MARK: - Destinations
 
     var defaultDestination: DestinationID {