added theme setting; fixed light theme issues

app/lib/features/settings/data/models/settings.dart

@@ -1,6 +1,7 @@
 import 'package:bang_navigator/features/content_block/data/models/host.dart';
 import 'package:copy_with_extension/copy_with_extension.dart';
 import 'package:fast_equatable/fast_equatable.dart';
+import 'package:flutter/material.dart';
 
 part 'settings.g.dart';
 
@@ -13,6 +14,7 @@ class Settings with FastEquatable {
   final bool launchUrlExternal;
   final bool enableContentBlocking;
   final Set<HostSource> enableHostList;
+  final ThemeMode themeMode;
 
   Settings({
     required this.kagiSession,
@@ -22,6 +24,7 @@ class Settings with FastEquatable {
     required this.launchUrlExternal,
     required this.enableContentBlocking,
     required this.enableHostList,
+    required this.themeMode,
   });
 
   Settings.withDefaults({
@@ -32,12 +35,14 @@ class Settings with FastEquatable {
     bool? launchUrlExternal,
     bool? enableContentBlocking,
     Set<HostSource>? enableHostList,
+    ThemeMode? themeMode,
   })  : showEarlyAccessFeatures = showEarlyAccessFeatures ?? true,
         incognitoMode = incognitoMode ?? true,
         enableJavascript = enableJavascript ?? true,
         launchUrlExternal = launchUrlExternal ?? false,
         enableContentBlocking = enableContentBlocking ?? true,
-        enableHostList = enableHostList ?? {HostSource.stevenBlackUnified};
+        enableHostList = enableHostList ?? {HostSource.stevenBlackUnified},
+        themeMode = themeMode ?? ThemeMode.dark;
 
   @override
   bool get cacheHash => true;
@@ -51,5 +56,6 @@ class Settings with FastEquatable {
         launchUrlExternal,
         enableContentBlocking,
         enableHostList,
+        themeMode,
       ];
 }