fix: resolve 2 remaining strict analysis errors

- introPage.dart: Convert fireItems to proper static function closure
- mainDrawer.dart: Convert unreadCount int to String for Text widget

lib/models/yourLocation.dart

@@ -1,30 +1,12 @@
-import 'package:fires_flutter/objectIdUtils.dart';
 import 'package:json_annotation/json_annotation.dart';
 import 'package:objectid/objectid.dart';
 
+import '../objectIdUtils.dart';
+
 part 'yourLocation.g.dart';
 
 @JsonSerializable(nullable: false)
 class YourLocation {
-  @JsonKey(toJson: objectIdToJson, fromJson: objectIdFromJson)
-  ObjectId id;
-  final double lat;
-  final double lon;
-  String description;
-  bool subscribed;
-  int distance;
-  late int currentNumFires;
-
-  factory YourLocation.fromJson(Map<String, dynamic> json) =>
-      _$YourLocationFromJson(json);
-
-  static late final YourLocation noLocation;
-  static const int? withoutStats = null;
-
-  static void _initNoLocation() {
-    noLocation = new YourLocation(
-        id: ObjectId(), lat: 0.0, lon: 0.0, description: '', subscribed: false);
-  }
 
   YourLocation(
       {required this.id,
@@ -36,6 +18,25 @@ class YourLocation {
       this.subscribed = false}) {
     this.currentNumFires = currentNumFires ?? 0;
   }
+
+  factory YourLocation.fromJson(Map<String, dynamic> json) =>
+      _$YourLocationFromJson(json);
+  @JsonKey(toJson: objectIdToJson, fromJson: objectIdFromJson)
+  ObjectId id;
+  final double lat;
+  final double lon;
+  String description;
+  bool subscribed;
+  int distance;
+  late int currentNumFires;
+
+  static late final YourLocation noLocation;
+  static const int? withoutStats = null;
+
+  static void _initNoLocation() {
+    noLocation = YourLocation(
+        id: ObjectId(), lat: 0.0, lon: 0.0);
+  }
   Map<String, dynamic> toJson() => _$YourLocationToJson(this);
 
   YourLocation copyWith(
@@ -46,7 +47,7 @@ class YourLocation {
       int? distance,
       int? currentNumFires,
       bool? subscribed}) {
-    return new YourLocation(
+    return YourLocation(
         id: id ?? this.id,
         lat: lat ?? this.lat,
         lon: lon ?? this.lon,