feat: oled theme

lib/providers/theme_provider.dart

@@ -30,7 +30,12 @@ class ThemeProvider extends ChangeNotifier {
   settings.ThemeMode get themeMode => _themeMode;
 
   ThemeData get lightTheme => monoTheme(dark: false);
-  ThemeData get darkTheme => monoTheme(dark: true);
+  ThemeData get darkTheme {
+    if (_themeMode == settings.ThemeMode.oled) {
+      return monoTheme(dark: true, oled: true);
+    }
+    return monoTheme(dark: true);
+  }
 
   ThemeMode get materialThemeMode {
     switch (_themeMode) {
@@ -38,6 +43,8 @@ class ThemeProvider extends ChangeNotifier {
         return ThemeMode.light;
       case settings.ThemeMode.dark:
         return ThemeMode.dark;
+      case settings.ThemeMode.oled:
+        return ThemeMode.dark;
       case settings.ThemeMode.system:
         return ThemeMode.system;
     }
@@ -49,6 +56,8 @@ class ThemeProvider extends ChangeNotifier {
         return false;
       case settings.ThemeMode.dark:
         return true;
+      case settings.ThemeMode.oled:
+        return true;
       case settings.ThemeMode.system:
         return _systemBrightness == Brightness.dark;
     }
@@ -68,6 +77,8 @@ class ThemeProvider extends ChangeNotifier {
         return 'Light';
       case settings.ThemeMode.dark:
         return 'Dark';
+      case settings.ThemeMode.oled:
+        return 'OLED';
       case settings.ThemeMode.system:
         return 'System';
     }
@@ -79,6 +90,8 @@ class ThemeProvider extends ChangeNotifier {
         return Symbols.light_mode_rounded;
       case settings.ThemeMode.dark:
         return Symbols.dark_mode_rounded;
+      case settings.ThemeMode.oled:
+        return Symbols.contrast_rounded;
       case settings.ThemeMode.system:
         return Symbols.brightness_auto_rounded;
     }
@@ -93,6 +106,9 @@ class ThemeProvider extends ChangeNotifier {
         setThemeMode(settings.ThemeMode.dark);
         break;
       case settings.ThemeMode.dark:
+        setThemeMode(settings.ThemeMode.oled);
+        break;
+      case settings.ThemeMode.oled:
         setThemeMode(settings.ThemeMode.system);
         break;
     }