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/firesApp.dart

@@ -20,7 +20,7 @@ import 'theme.dart';
 import 'themeDev.dart';
 
 class FiresApp extends StatefulWidget {
-  FiresApp(this.store);
+  const FiresApp(this.store, {super.key});
 
   final Store<AppState> store;
 
@@ -29,48 +29,48 @@ class FiresApp extends StatefulWidget {
 }
 
 class _FiresAppState extends State<FiresApp> {
+
+  // globals.getIt.registerSingleton
+  _FiresAppState(this.store);
   final GlobalKey<NavigatorState> navigatorKey =
-      new GlobalKey<NavigatorState>();
-  static final WidgetBuilder introWidget = (context) => new IntroPage();
-  static final WidgetBuilder continueWidget = (context) => new HomePage();
+      GlobalKey<NavigatorState>();
+  static Widget introWidget(BuildContext context) => IntroPage();
+  static Widget continueWidget(BuildContext context) => const HomePage();
 
   final Map<String, WidgetBuilder> routes = <String, WidgetBuilder>{
     IntroPage.routeName: introWidget,
     HomePage.routeName: continueWidget,
-    PrivacyPage.routeName: (BuildContext context) => new PrivacyPage(context),
-    ActiveFiresPage.routeName: (BuildContext context) => new ActiveFiresPage(),
-    Sandbox.routeName: (BuildContext context) => new Sandbox(),
-    FireAlert.routeName: (BuildContext context) => new FireAlert(),
-    SupportPage.routeName: (BuildContext context) => new SupportPage(),
+    PrivacyPage.routeName: (BuildContext context) => PrivacyPage(context),
+    ActiveFiresPage.routeName: (BuildContext context) => const ActiveFiresPage(),
+    Sandbox.routeName: (BuildContext context) => const Sandbox(),
+    FireAlert.routeName: (BuildContext context) => const FireAlert(),
+    SupportPage.routeName: (BuildContext context) => const SupportPage(),
     FireNotificationList.routeName: (BuildContext context) =>
-        new FireNotificationList(),
+        const FireNotificationList(),
     MonitoredAreasPage.routeName: (BuildContext context) =>
-        new MonitoredAreasPage()
+        const MonitoredAreasPage()
   };
 
   final Store<AppState> store;
 
-  // globals.getIt.registerSingleton
-  _FiresAppState(this.store);
-
   @override
   Widget build(BuildContext context) {
-    StatefulWidget home = new MaterialAppWithIntroHome(
+    final StatefulWidget home = MaterialAppWithIntroHome(
         introWidget, continueWidget, 'showInitialWizard-2018-06-27-01');
-    return new StoreProvider<AppState>(
-        store: this.store,
-        child: new MaterialApp(
+    return StoreProvider<AppState>(
+        store: store,
+        child: MaterialApp(
             navigatorKey: navigatorKey,
-            localizationsDelegates: [
+            localizationsDelegates: <LocalizationsDelegate<dynamic>> [
               S.delegate,
               GlobalMaterialLocalizations.delegate,
               GlobalWidgetsLocalizations.delegate,
             ],
             supportedLocales: S.delegate.supportedLocales,
             localeResolutionCallback:
-                S.delegate.resolution(fallback: new Locale("en", "")),
+                S.delegate.resolution(fallback: const Locale('en', '')),
             home: home,
-            onGenerateTitle: (context) {
+            onGenerateTitle: (BuildContext context) {
               print('MaterialApp onGenerateTitle');
               return S.of(context).appName;
             },