add oled theme support

apps/weblibre/lib/features/user/data/models/general_settings.dart

@@ -145,6 +145,10 @@ class GeneralSettings with FastEquatable {
   /// accept and complete an inline search suggestion. Defaults to false.
   final bool acceptSuggestionOnSubmit;
 
+  /// Whether dark mode should use pure-black ("OLED"/high-contrast) surfaces.
+  /// Only takes effect when the effective brightness is dark. Defaults to false.
+  final bool pureBlack;
+
   GeneralSettings({
     required this.themeMode,
     required this.uiScaleFactor,
@@ -203,6 +207,7 @@ class GeneralSettings with FastEquatable {
     required this.enableLocalSearchIndex,
     required this.indexPrivateTabs,
     required this.acceptSuggestionOnSubmit,
+    required this.pureBlack,
   });
 
   GeneralSettings.withDefaults({
@@ -263,6 +268,7 @@ class GeneralSettings with FastEquatable {
     bool? enableLocalSearchIndex,
     bool? indexPrivateTabs,
     bool? acceptSuggestionOnSubmit,
+    bool? pureBlack,
   }) : themeMode = themeMode ?? ThemeMode.dark,
        uiScaleFactor = uiScaleFactor ?? defaultUiScaleFactor,
        disableAnimations = disableAnimations ?? false,
@@ -331,7 +337,8 @@ class GeneralSettings with FastEquatable {
        externalAppIntentPolicies = externalAppIntentPolicies ?? const {},
        enableLocalSearchIndex = enableLocalSearchIndex ?? true,
        indexPrivateTabs = indexPrivateTabs ?? false,
-       acceptSuggestionOnSubmit = acceptSuggestionOnSubmit ?? false;
+       acceptSuggestionOnSubmit = acceptSuggestionOnSubmit ?? false,
+       pureBlack = pureBlack ?? false;
 
   factory GeneralSettings.fromJson(Map<String, dynamic> json) {
     // Migrate legacy `newTabPosition` setting to direction settings.
@@ -442,5 +449,6 @@ class GeneralSettings with FastEquatable {
     enableLocalSearchIndex,
     indexPrivateTabs,
     acceptSuggestionOnSubmit,
+    pureBlack,
   ];
 }

apps/weblibre/lib/features/user/data/models/general_settings.g.dart

@@ -143,6 +143,8 @@ abstract class _$GeneralSettingsCWProxy {
 
   GeneralSettings acceptSuggestionOnSubmit(bool acceptSuggestionOnSubmit);
 
+  GeneralSettings pureBlack(bool pureBlack);
+
   /// Creates a new instance with the provided field values.
   /// Passing `null` to a nullable field nullifies it, while `null` for a non-nullable field is ignored. To update a single field use `GeneralSettings(...).copyWith.fieldName(value)`.
   ///
@@ -208,6 +210,7 @@ abstract class _$GeneralSettingsCWProxy {
     bool enableLocalSearchIndex,
     bool indexPrivateTabs,
     bool acceptSuggestionOnSubmit,
+    bool pureBlack,
   });
 }
 
@@ -461,6 +464,9 @@ class _$GeneralSettingsCWProxyImpl implements _$GeneralSettingsCWProxy {
   GeneralSettings acceptSuggestionOnSubmit(bool acceptSuggestionOnSubmit) =>
       call(acceptSuggestionOnSubmit: acceptSuggestionOnSubmit);
 
+  @override
+  GeneralSettings pureBlack(bool pureBlack) => call(pureBlack: pureBlack);
+
   @override
   /// Creates a new instance with the provided field values.
   /// Passing `null` to a nullable field nullifies it, while `null` for a non-nullable field is ignored. To update a single field use `GeneralSettings(...).copyWith.fieldName(value)`.
@@ -528,6 +534,7 @@ class _$GeneralSettingsCWProxyImpl implements _$GeneralSettingsCWProxy {
     Object? enableLocalSearchIndex = const $CopyWithPlaceholder(),
     Object? indexPrivateTabs = const $CopyWithPlaceholder(),
     Object? acceptSuggestionOnSubmit = const $CopyWithPlaceholder(),
+    Object? pureBlack = const $CopyWithPlaceholder(),
   }) {
     return GeneralSettings(
       themeMode: themeMode == const $CopyWithPlaceholder() || themeMode == null
@@ -866,6 +873,10 @@ class _$GeneralSettingsCWProxyImpl implements _$GeneralSettingsCWProxy {
           ? _value.acceptSuggestionOnSubmit
           // ignore: cast_nullable_to_non_nullable
           : acceptSuggestionOnSubmit as bool,
+      pureBlack: pureBlack == const $CopyWithPlaceholder() || pureBlack == null
+          ? _value.pureBlack
+          // ignore: cast_nullable_to_non_nullable
+          : pureBlack as bool,
     );
   }
 }
@@ -992,6 +1003,7 @@ GeneralSettings _$GeneralSettingsFromJson(
   enableLocalSearchIndex: json['enableLocalSearchIndex'] as bool?,
   indexPrivateTabs: json['indexPrivateTabs'] as bool?,
   acceptSuggestionOnSubmit: json['acceptSuggestionOnSubmit'] as bool?,
+  pureBlack: json['pureBlack'] as bool?,
 );
 
 Map<String, dynamic> _$GeneralSettingsToJson(
@@ -1067,6 +1079,7 @@ Map<String, dynamic> _$GeneralSettingsToJson(
   'enableLocalSearchIndex': instance.enableLocalSearchIndex,
   'indexPrivateTabs': instance.indexPrivateTabs,
   'acceptSuggestionOnSubmit': instance.acceptSuggestionOnSubmit,
+  'pureBlack': instance.pureBlack,
 };
 
 const _$ThemeModeEnumMap = {