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/mainProd.dart

@@ -1,25 +1,27 @@
 import 'package:comunes_flutter/comunes_flutter.dart';
+import 'package:redux/src/store.dart';
 import 'package:sentry_flutter/sentry_flutter.dart';
 
 import 'globals.dart' as globals;
 import 'mainCommon.dart';
+import 'models/appState.dart';
 
 Future<void> main() async {
   globals.isDevelopment = false;
 
   // Load secrets to get Sentry DSN
-  final secrets = await loadSecrets();
+  final Map<String, dynamic> secrets = await loadSecrets();
 
   await SentryFlutter.init(
-    (options) {
+    (SentryFlutterOptions options) {
       options.dsn = secrets['sentryDSN'] as String?;
     },
-    appRunner: () => mainCommon([]),
+    appRunner: () => mainCommon(<Middleware<AppState>>[]),
   );
 }
 
 Future<Map<String, dynamic>> loadSecrets() async {
-  return await SecretLoader(
+  return SecretLoader(
           secretPath: globals.isDevelopment
               ? 'assets/private-settings-dev.json'
               : 'assets/private-settings.json')