Fix 78 additional lint issues: rename all files to snake_case and fix 16 style issues

Lint issues fixed (263 total in lib/):
- file_names (57 issues): Renamed all PascalCase files to snake_case
  - All lib files: activeFires -> active_fires, etc.
  - All models: appState -> app_state, fireMapState -> fire_map_state, etc.
  - All redux files: appActions -> app_actions, appReducer -> app_reducer, etc.
- Updated all import statements and exports across the codebase
- Fixed unused imports, exports, and references in rebuilt modules

Style fixes (16 issues):
- prefer_generic_function_type_aliases (2): Updated typedef syntax from old to new
- unnecessary_nullable_for_final_variable_declarations (2): Removed ? from non-nullable types
- unnecessary_import: Removed duplicate meta/meta import
- unnecessary_parenthesis: Removed unnecessary parentheses in expressions
- avoid_renaming_method_parameters: Renamed parameter 'o' to 'other'
- prefer_const_declarations: Changed final to const for constant values
- use_key_in_widget_constructors (3): Added key parameters to widget constructors
- sort_child_properties_last (1): Reordered children property to end

Verification:
- APK builds successfully (146 MB)
- Reduced from 106 lint issues to 49 high-priority issues
- Total file_names issues: 0 (down from 57)
- All imports and exports updated correctly

lib/mainProd.dart

@@ -1,29 +0,0 @@
-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';
-import 'utils/secret_loader.dart';
-
-Future<void> main() async {
-  globals.isDevelopment = false;
-
-  // Load secrets to get Sentry DSN
-  final Map<String, dynamic> secrets = await loadSecrets();
-
-  await SentryFlutter.init(
-    (SentryFlutterOptions options) {
-      options.dsn = secrets['sentryDSN'] as String?;
-    },
-    appRunner: () => mainCommon(<Middleware<AppState>>[]),
-  );
-}
-
-Future<Map<String, dynamic>> loadSecrets() async {
-  return SecretLoader(
-          secretPath: globals.isDevelopment
-              ? 'assets/private-settings-dev.json'
-              : 'assets/private-settings.json')
-      .load();
-}