Remove info-level lint issues: avoid_dynamic_calls, use_build_context_synchronously, avoid_print, non_constant_identifier_names

- Type dynamic map accesses properly (avoid_dynamic_calls in genericMap, globalFiresBottomStats)
- Capture context before async gaps (use_build_context_synchronously in genericMap, genericMapBottom, globalFiresBottomStats)
- Replace print() with debugPrint() (avoid_print in firesApi.dart)
- Rename fireMarker function and _LayerSelectorButton to camelCase
- Rename variable FireNotifications to fireNotifications
- Fix no_default_cases in switch statements (add missing subscriptionConfirm case)
- Make FireNotification fields final, remove @immutable from YourLocation (mutable)
- Make monitoredAreas field final in _ViewModel
- Update subscribeViaApi to use copyWith instead of direct field assignment

lib/models/yourLocation.dart

@@ -6,7 +6,6 @@ import '../objectIdUtils.dart';
 
 part 'yourLocation.g.dart';
 
-@immutable
 @JsonSerializable()
 class YourLocation {
   YourLocation(
@@ -16,20 +15,19 @@ class YourLocation {
       this.description = '',
       this.distance = 10,
       int? currentNumFires,
-      this.subscribed = false}) {
-    this.currentNumFires = currentNumFires ?? 0;
-  }
+      this.subscribed = false})
+      : currentNumFires = currentNumFires ?? 0;
 
   factory YourLocation.fromJson(Map<String, dynamic> json) =>
       _$YourLocationFromJson(json);
   @JsonKey(toJson: objectIdToJson, fromJson: objectIdFromJson)
-  ObjectId id;
+  final ObjectId id;
   final double lat;
   final double lon;
   String description;
   bool subscribed;
   int distance;
-  late int currentNumFires;
+  int currentNumFires;
 
   static YourLocation get noLocation {
     _noLocation ??= YourLocation(id: ObjectId(), lat: 0.0, lon: 0.0);