Msg Retry fixes, channel message fixes. Notification fixes. Make more desktop friendly. Enhance retry algo. Fix predicted location clustering add retries to reactions and fix the reactions in private DMS centralize and cleanup code in var areas

lib/models/app_settings.dart

@@ -32,6 +32,11 @@ class AppSettings {
   final bool notifyOnNewChannelMessage;
   final bool notifyOnNewAdvert;
   final bool autoRouteRotationEnabled;
+  final double maxRouteWeight;
+  final double initialRouteWeight;
+  final double routeWeightSuccessIncrement;
+  final double routeWeightFailureDecrement;
+  final int maxMessageRetries;
   final String themeMode;
   final String? languageOverride; // null = system default
   final bool appDebugLogEnabled;
@@ -62,6 +67,11 @@ class AppSettings {
     this.notifyOnNewChannelMessage = true,
     this.notifyOnNewAdvert = true,
     this.autoRouteRotationEnabled = false,
+    this.maxRouteWeight = 5.0,
+    this.initialRouteWeight = 3.0,
+    this.routeWeightSuccessIncrement = 0.5,
+    this.routeWeightFailureDecrement = 0.2,
+    this.maxMessageRetries = 5,
     this.themeMode = 'system',
     this.languageOverride,
     this.appDebugLogEnabled = false,
@@ -96,6 +106,11 @@ class AppSettings {
       'notify_on_new_channel_message': notifyOnNewChannelMessage,
       'notify_on_new_advert': notifyOnNewAdvert,
       'auto_route_rotation_enabled': autoRouteRotationEnabled,
+      'max_route_weight': maxRouteWeight,
+      'initial_route_weight': initialRouteWeight,
+      'route_weight_success_increment': routeWeightSuccessIncrement,
+      'route_weight_failure_decrement': routeWeightFailureDecrement,
+      'max_message_retries': maxMessageRetries,
       'theme_mode': themeMode,
       'language_override': languageOverride,
       'app_debug_log_enabled': appDebugLogEnabled,
@@ -142,6 +157,14 @@ class AppSettings {
       notifyOnNewAdvert: json['notify_on_new_advert'] as bool? ?? true,
       autoRouteRotationEnabled:
           json['auto_route_rotation_enabled'] as bool? ?? false,
+      maxRouteWeight: (json['max_route_weight'] as num?)?.toDouble() ?? 5.0,
+      initialRouteWeight:
+          (json['initial_route_weight'] as num?)?.toDouble() ?? 3.0,
+      routeWeightSuccessIncrement:
+          (json['route_weight_success_increment'] as num?)?.toDouble() ?? 0.5,
+      routeWeightFailureDecrement:
+          (json['route_weight_failure_decrement'] as num?)?.toDouble() ?? 0.2,
+      maxMessageRetries: json['max_message_retries'] as int? ?? 5,
       themeMode: json['theme_mode'] as String? ?? 'system',
       languageOverride: json['language_override'] as String?,
       appDebugLogEnabled: json['app_debug_log_enabled'] as bool? ?? false,
@@ -187,6 +210,11 @@ class AppSettings {
     bool? notifyOnNewChannelMessage,
     bool? notifyOnNewAdvert,
     bool? autoRouteRotationEnabled,
+    double? maxRouteWeight,
+    double? initialRouteWeight,
+    double? routeWeightSuccessIncrement,
+    double? routeWeightFailureDecrement,
+    int? maxMessageRetries,
     String? themeMode,
     Object? languageOverride = _unset,
     bool? appDebugLogEnabled,
@@ -222,6 +250,13 @@ class AppSettings {
       notifyOnNewAdvert: notifyOnNewAdvert ?? this.notifyOnNewAdvert,
       autoRouteRotationEnabled:
           autoRouteRotationEnabled ?? this.autoRouteRotationEnabled,
+      maxRouteWeight: maxRouteWeight ?? this.maxRouteWeight,
+      initialRouteWeight: initialRouteWeight ?? this.initialRouteWeight,
+      routeWeightSuccessIncrement:
+          routeWeightSuccessIncrement ?? this.routeWeightSuccessIncrement,
+      routeWeightFailureDecrement:
+          routeWeightFailureDecrement ?? this.routeWeightFailureDecrement,
+      maxMessageRetries: maxMessageRetries ?? this.maxMessageRetries,
       themeMode: themeMode ?? this.themeMode,
       languageOverride: languageOverride == _unset
           ? this.languageOverride