Remove info-level lint issues: avoid_dynamic_calls, use_build_context_synchronously, avoid_print, non_constant_identifier_names

- Type dynamic map accesses properly (avoid_dynamic_calls in genericMap, globalFiresBottomStats)
- Capture context before async gaps (use_build_context_synchronously in genericMap, genericMapBottom, globalFiresBottomStats)
- Replace print() with debugPrint() (avoid_print in firesApi.dart)
- Rename fireMarker function and _LayerSelectorButton to camelCase
- Rename variable FireNotifications to fireNotifications
- Fix no_default_cases in switch statements (add missing subscriptionConfirm case)
- Make FireNotification fields final, remove @immutable from YourLocation (mutable)
- Make monitoredAreas field final in _ViewModel
- Update subscribeViaApi to use copyWith instead of direct field assignment

lib/globalFiresBottomStats.dart

@@ -30,13 +30,18 @@ class _GlobalFiresBottomStatsState extends State<GlobalFiresBottomStats> {
         .then((String result) {
       try {
         final Moment now = Moment.now();
-        final DateTime last =
-            DateTime.parse(json.decode(result)['value'] as String);
+        final dynamic decodedResult = json.decode(result);
+        final Map<String, dynamic> resultMap =
+            decodedResult as Map<String, dynamic>;
+        final DateTime last = DateTime.parse(resultMap['value'] as String);
         http
             .read(Uri.parse('${firesApiUrl}status/active-fires-count'))
             .then((String result) {
           try {
-            final int count = (json.decode(result)['total'] as num).toInt();
+            final dynamic decodedCountResult = json.decode(result);
+            final Map<String, dynamic> countMap =
+                decodedCountResult as Map<String, dynamic>;
+            final int count = (countMap['total'] as num).toInt();
             setState(() {
               lastCheck = now.from(context, last);
               activeFires = count;