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/appState.dart

@@ -1,8 +1,6 @@
 import 'dart:async';
 
 import 'package:comunes_flutter/comunes_flutter.dart';
-import 'package:fires_flutter/models/fireNotification.dart';
-import 'package:fires_flutter/models/yourLocation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_map/flutter_map.dart';
 import 'package:json_annotation/json_annotation.dart';
@@ -10,7 +8,9 @@ import 'package:latlong2/latlong.dart';
 import 'package:meta/meta.dart';
 
 import 'fireMapState.dart';
+import 'fireNotification.dart';
 import 'user.dart';
+import 'yourLocation.dart';
 
 export 'fireMapState.dart';
 
@@ -19,6 +19,25 @@ part 'appState.g.dart';
 @immutable
 @JsonSerializable(nullable: false)
 class AppState {
+
+  const AppState(
+      {this.yourLocations = const <YourLocation>[],
+      this.fireNotifications = const <FireNotification>[],
+      this.fireNotificationsUnread = 0,
+      this.user = const User.initial(),
+      this.isLoading = false,
+      this.isLoaded = false,
+      this.error = '',
+      this.gmapKey = '',
+      this.firesApiKey = '',
+      this.firesApiUrl = '',
+      this.serverUrl = '',
+      this.monitoredAreas = const <Polyline>[],
+      this.fireMapState = const FireMapState.initial()});
+
+  @JsonKey(ignore: true)
+  factory AppState.fromJson(Map<String, dynamic> json) =>
+      _$AppStateFromJson(json);
   @JsonKey(ignore: true)
   final bool isLoading;
   @JsonKey(ignore: true)
@@ -44,25 +63,6 @@ class AppState {
   @JsonKey(ignore: true)
   final FireMapState fireMapState;
 
-  @JsonKey(ignore: true)
-  factory AppState.fromJson(Map<String, dynamic> json) =>
-      _$AppStateFromJson(json);
-
-  AppState(
-      {this.yourLocations = const <YourLocation>[],
-      this.fireNotifications = const <FireNotification>[],
-      this.fireNotificationsUnread = 0,
-      this.user = const User.initial(),
-      this.isLoading = false,
-      this.isLoaded = false,
-      this.error = '',
-      this.gmapKey = '',
-      this.firesApiKey = '',
-      this.firesApiUrl = '',
-      this.serverUrl = '',
-      this.monitoredAreas = const <Polyline>[],
-      this.fireMapState = const FireMapState.initial()});
-
   AppState copyWith(
       {bool? isLoading,
       bool? isLoaded,
@@ -77,7 +77,7 @@ class AppState {
       int? fireNotificationsUnread,
       FireMapState? fireMapState,
       List<Polyline>? monitoredAreas}) {
-    return new AppState(
+    return AppState(
         isLoading: isLoading ?? this.isLoading,
         isLoaded: isLoaded ?? this.isLoaded,
         user: user ?? this.user,
@@ -100,24 +100,24 @@ class AppState {
   }
 }
 
-typedef void AddYourLocationFunction(YourLocation loc);
-typedef void DeleteYourLocationFunction(YourLocation loc);
-typedef void OnRefreshYourLocationsFunction(Completer<Null> callback);
-typedef void ToggleSubscriptionFunction(YourLocation loc);
-typedef void OnLocationTapFunction(YourLocation loc);
-typedef void OnSubscribeFunction(YourLocation loc);
-typedef void OnSubscribeDistanceChangeFunction(YourLocation loc);
-typedef void OnUnSubscribeFunction(YourLocation loc);
-typedef void OnSubscribeConfirmedFunction(YourLocation loc);
-typedef void OnLocationEdit(YourLocation loc);
-typedef void OnLocationEditing(YourLocation loc);
-typedef void OnLocationEditConfirm(YourLocation loc);
-typedef void OnLocationEditCancel(YourLocation loc);
-typedef void TapFireNotificationFunction(FireNotification notif);
-typedef void OnFirePressedInMap(LatLng latLng, DateTime when, String source);
+typedef AddYourLocationFunction = void Function(YourLocation loc);
+typedef DeleteYourLocationFunction = void Function(YourLocation loc);
+typedef OnRefreshYourLocationsFunction = void Function(Completer<void> callback);
+typedef ToggleSubscriptionFunction = void Function(YourLocation loc);
+typedef OnLocationTapFunction = void Function(YourLocation loc);
+typedef OnSubscribeFunction = void Function(YourLocation loc);
+typedef OnSubscribeDistanceChangeFunction = void Function(YourLocation loc);
+typedef OnUnSubscribeFunction = void Function(YourLocation loc);
+typedef OnSubscribeConfirmedFunction = void Function(YourLocation loc);
+typedef OnLocationEdit = void Function(YourLocation loc);
+typedef OnLocationEditing = void Function(YourLocation loc);
+typedef OnLocationEditConfirm = void Function(YourLocation loc);
+typedef OnLocationEditCancel = void Function(YourLocation loc);
+typedef TapFireNotificationFunction = void Function(FireNotification notif);
+typedef OnFirePressedInMap = void Function(LatLng latLng, DateTime when, String source);
 // typedef void OnReceivedFireNotificationFunction(FireNotification notif);
-typedef void DeleteFireNotificationFunction(FireNotification notif);
-typedef void DeleteAllFireNotificationFunction();
+typedef DeleteFireNotificationFunction = void Function(FireNotification notif);
+typedef DeleteAllFireNotificationFunction = void Function();
 
 // unused
 // typedef void UpdateYourLocationFunction(ObjectId id, YourLocation loc);