Add guessed node location map keys and translations

Adds map_showGuessedLocations and map_guessedLocation to app_en.arb and translates them across all 14 supported locales. Regenerates dart localizations.

lib/models/app_settings.dart

@@ -22,6 +22,7 @@ class AppSettings {
   final bool mapKeyPrefixEnabled;
   final String mapKeyPrefix;
   final bool mapShowMarkers;
+  final bool mapShowGuessedLocations;
   final bool enableMessageTracing;
   final Map<String, double>? mapCacheBounds;
   final int mapCacheMinZoom;
@@ -48,6 +49,7 @@ class AppSettings {
     this.mapKeyPrefixEnabled = false,
     this.mapKeyPrefix = '',
     this.mapShowMarkers = true,
+    this.mapShowGuessedLocations = true,
     this.enableMessageTracing = false,
     this.mapCacheBounds,
     this.mapCacheMinZoom = 10,
@@ -78,6 +80,7 @@ class AppSettings {
       'map_key_prefix_enabled': mapKeyPrefixEnabled,
       'map_key_prefix': mapKeyPrefix,
       'map_show_markers': mapShowMarkers,
+      'map_show_guessed_locations': mapShowGuessedLocations,
       'enable_message_tracing': enableMessageTracing,
       'map_cache_bounds': mapCacheBounds,
       'map_cache_min_zoom': mapCacheMinZoom,
@@ -115,6 +118,8 @@ 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,
+      mapShowGuessedLocations:
+          json['map_show_guessed_locations'] as bool? ?? true,
       enableMessageTracing: json['enable_message_tracing'] as bool? ?? false,
       mapCacheBounds: (json['map_cache_bounds'] as Map?)?.map(
         (key, value) => MapEntry(key.toString(), (value as num).toDouble()),
@@ -159,6 +164,7 @@ class AppSettings {
     bool? mapKeyPrefixEnabled,
     String? mapKeyPrefix,
     bool? mapShowMarkers,
+    bool? mapShowGuessedLocations,
     bool? enableMessageTracing,
     Object? mapCacheBounds = _unset,
     int? mapCacheMinZoom,
@@ -185,6 +191,8 @@ class AppSettings {
       mapKeyPrefixEnabled: mapKeyPrefixEnabled ?? this.mapKeyPrefixEnabled,
       mapKeyPrefix: mapKeyPrefix ?? this.mapKeyPrefix,
       mapShowMarkers: mapShowMarkers ?? this.mapShowMarkers,
+      mapShowGuessedLocations:
+          mapShowGuessedLocations ?? this.mapShowGuessedLocations,
       enableMessageTracing: enableMessageTracing ?? this.enableMessageTracing,
       mapCacheBounds: mapCacheBounds == _unset
           ? this.mapCacheBounds