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/placesAutocompleteUtils.dart

@@ -1,8 +1,9 @@
 import 'dart:async';
 
-import 'package:fires_flutter/models/yourLocation.dart';
 import 'package:flutter/material.dart';
 
+import 'models/yourLocation.dart';
+
 
 /// Open a places dialog for selecting a location.
 /// Currently returns a default location as the google_places_autocomplete package
@@ -10,9 +11,9 @@ import 'package:flutter/material.dart';
 /// TODO: Implement with a modern null-safe places API integration
 Future<YourLocation> openPlacesDialog(GlobalKey<ScaffoldState> sc) async {
   // Show a snackbar informing the user that this feature is not yet available
-  final messenger = ScaffoldMessenger.of(sc.currentContext!);
+  final ScaffoldMessengerState messenger = ScaffoldMessenger.of(sc.currentContext!);
   messenger.showSnackBar(
-    SnackBar(
+    const SnackBar(
       content: Text(
           'Place selection is currently unavailable. Please use manual location entry.'),
     ),