updated ui added new features

lib/models/app_settings.dart

@@ -1,4 +1,6 @@
 class AppSettings {
+  static const Object _unset = Object();
+
   final bool clearPathOnMaxRetry;
   final bool mapShowRepeaters;
   final bool mapShowChatNodes;
@@ -7,8 +9,12 @@ class AppSettings {
   final bool mapKeyPrefixEnabled;
   final String mapKeyPrefix;
   final bool mapShowMarkers;
+  final Map<String, double>? mapCacheBounds;
+  final int mapCacheMinZoom;
+  final int mapCacheMaxZoom;
   final bool notificationsEnabled;
   final bool notifyOnNewMessage;
+  final bool notifyOnNewChannelMessage;
   final bool notifyOnNewAdvert;
   final bool autoRouteRotationEnabled;
   final String themeMode;
@@ -23,8 +29,12 @@ class AppSettings {
     this.mapKeyPrefixEnabled = false,
     this.mapKeyPrefix = '',
     this.mapShowMarkers = true,
+    this.mapCacheBounds,
+    this.mapCacheMinZoom = 10,
+    this.mapCacheMaxZoom = 15,
     this.notificationsEnabled = true,
     this.notifyOnNewMessage = true,
+    this.notifyOnNewChannelMessage = true,
     this.notifyOnNewAdvert = true,
     this.autoRouteRotationEnabled = false,
     this.themeMode = 'system',
@@ -41,8 +51,12 @@ class AppSettings {
       'map_key_prefix_enabled': mapKeyPrefixEnabled,
       'map_key_prefix': mapKeyPrefix,
       'map_show_markers': mapShowMarkers,
+      'map_cache_bounds': mapCacheBounds,
+      'map_cache_min_zoom': mapCacheMinZoom,
+      'map_cache_max_zoom': mapCacheMaxZoom,
       'notifications_enabled': notificationsEnabled,
       'notify_on_new_message': notifyOnNewMessage,
+      'notify_on_new_channel_message': notifyOnNewChannelMessage,
       'notify_on_new_advert': notifyOnNewAdvert,
       'auto_route_rotation_enabled': autoRouteRotationEnabled,
       'theme_mode': themeMode,
@@ -60,8 +74,15 @@ class AppSettings {
       mapKeyPrefixEnabled: json['map_key_prefix_enabled'] as bool? ?? false,
       mapKeyPrefix: json['map_key_prefix'] as String? ?? '',
       mapShowMarkers: json['map_show_markers'] as bool? ?? true,
+      mapCacheBounds: (json['map_cache_bounds'] as Map?)?.map(
+            (key, value) => MapEntry(key.toString(), (value as num).toDouble()),
+          ),
+      mapCacheMinZoom: json['map_cache_min_zoom'] as int? ?? 10,
+      mapCacheMaxZoom: json['map_cache_max_zoom'] as int? ?? 15,
       notificationsEnabled: json['notifications_enabled'] as bool? ?? true,
       notifyOnNewMessage: json['notify_on_new_message'] as bool? ?? true,
+      notifyOnNewChannelMessage:
+          json['notify_on_new_channel_message'] as bool? ?? true,
       notifyOnNewAdvert: json['notify_on_new_advert'] as bool? ?? true,
       autoRouteRotationEnabled: json['auto_route_rotation_enabled'] as bool? ?? false,
       themeMode: json['theme_mode'] as String? ?? 'system',
@@ -81,8 +102,12 @@ class AppSettings {
     bool? mapKeyPrefixEnabled,
     String? mapKeyPrefix,
     bool? mapShowMarkers,
+    Object? mapCacheBounds = _unset,
+    int? mapCacheMinZoom,
+    int? mapCacheMaxZoom,
     bool? notificationsEnabled,
     bool? notifyOnNewMessage,
+    bool? notifyOnNewChannelMessage,
     bool? notifyOnNewAdvert,
     bool? autoRouteRotationEnabled,
     String? themeMode,
@@ -97,8 +122,14 @@ class AppSettings {
       mapKeyPrefixEnabled: mapKeyPrefixEnabled ?? this.mapKeyPrefixEnabled,
       mapKeyPrefix: mapKeyPrefix ?? this.mapKeyPrefix,
       mapShowMarkers: mapShowMarkers ?? this.mapShowMarkers,
+      mapCacheBounds:
+          mapCacheBounds == _unset ? this.mapCacheBounds : mapCacheBounds as Map<String, double>?,
+      mapCacheMinZoom: mapCacheMinZoom ?? this.mapCacheMinZoom,
+      mapCacheMaxZoom: mapCacheMaxZoom ?? this.mapCacheMaxZoom,
       notificationsEnabled: notificationsEnabled ?? this.notificationsEnabled,
       notifyOnNewMessage: notifyOnNewMessage ?? this.notifyOnNewMessage,
+      notifyOnNewChannelMessage:
+          notifyOnNewChannelMessage ?? this.notifyOnNewChannelMessage,
       notifyOnNewAdvert: notifyOnNewAdvert ?? this.notifyOnNewAdvert,
       autoRouteRotationEnabled: autoRouteRotationEnabled ?? this.autoRouteRotationEnabled,
       themeMode: themeMode ?? this.themeMode,