refactor: continue lint cleanup - 96 more issues fixed

- Add @immutable to classes with ==/hashCode (homePage, basicLocation, fireNotification, yourLocation, monitoredAreas)
- Fix camel_case_types (genericMap → GenericMap)
- Fix avoid_dynamic_calls (firesApi - typed responses)
- Fix use_build_context_synchronously (locationUtils)
- Fix always_put_control_body_on_new_line (4 reducers)
- Fix always_specify_types (placesAutocompleteUtils, reducers)
- Fix eol_at_end_of_file (4 files)
- Fix prefer_function_declarations_over_variables (introPage)
- Fix flutter_style_todos (fireMapReducer)

Build: APK generated, 0 errors, 0 warnings

lib/placesAutocompleteUtils.dart

@@ -31,7 +31,7 @@ class _PlaceSelectionDialog extends StatefulWidget {
 
 class _PlaceSelectionDialogState extends State<_PlaceSelectionDialog> {
   final TextEditingController _searchController = TextEditingController();
-  List<Location> _searchResults = [];
+  List<Location> _searchResults = <Location>[];
   bool _isSearching = false;
   String? _errorMessage;
 
@@ -44,7 +44,7 @@ class _PlaceSelectionDialogState extends State<_PlaceSelectionDialog> {
   Future<void> _searchPlaces(String query) async {
     if (query.isEmpty) {
       setState(() {
-        _searchResults = [];
+        _searchResults = <Location>[];
         _errorMessage = null;
       });
       return;
@@ -66,7 +66,7 @@ class _PlaceSelectionDialogState extends State<_PlaceSelectionDialog> {
     } catch (e) {
       setState(() {
         _errorMessage = 'Search error: ${e.toString()}';
-        _searchResults = [];
+        _searchResults = <Location>[];
       });
     } finally {
       setState(() {
@@ -147,7 +147,7 @@ class _PlaceSelectionDialogState extends State<_PlaceSelectionDialog> {
                     _searchPlaces(value);
                   } else {
                     setState(() {
-                      _searchResults = [];
+                      _searchResults = <Location>[];
                       _errorMessage = null;
                     });
                   }