refactor: Switch to flutter_lints

lib/utils/background_push.dart

@@ -97,7 +97,9 @@ class BackgroundPush {
       {final void Function(String errorMsg, {Uri link}) onFcmError}) {
     final instance = BackgroundPush.clientOnly(_client);
     instance.context = _context;
+    // ignore: prefer_initializing_formals
     instance.router = router;
+    // ignore: prefer_initializing_formals
     instance.onFcmError = onFcmError;
     instance.fullInit();
     return instance;
@@ -301,7 +303,7 @@ class BackgroundPush {
     }
 
     // initialise the plugin. app_icon needs to be a added as a drawable resource to the Android head project
-    final initializationSettingsAndroid =
+    const initializationSettingsAndroid =
         AndroidInitializationSettings('notifications_icon');
     final initializationSettingsIOS =
         IOSInitializationSettings(onDidReceiveLocalNotification: (i, a, b, c) {
@@ -596,11 +598,6 @@ class BackgroundPush {
     // load the locale
     await loadLocale();
 
-    // Count all unread events
-    var unreadEvents = 0;
-    client.rooms
-        .forEach((Room room) => unreadEvents += room.notificationCount ?? 0);
-
     // Calculate title
     final title = l10n.unreadMessages(room.notificationCount ?? 0);
 
@@ -645,7 +642,7 @@ class BackgroundPush {
       ),
       ticker: l10n.newMessageInFluffyChat,
     );
-    final iOSPlatformChannelSpecifics = IOSNotificationDetails();
+    const iOSPlatformChannelSpecifics = IOSNotificationDetails();
     final platformChannelSpecifics = NotificationDetails(
       android: androidPlatformChannelSpecifics,
       iOS: iOSPlatformChannelSpecifics,
@@ -681,7 +678,7 @@ class BackgroundPush {
 
       // Display notification
       final androidPlatformChannelSpecifics = _getAndroidNotificationDetails();
-      final iOSPlatformChannelSpecifics = IOSNotificationDetails();
+      const iOSPlatformChannelSpecifics = IOSNotificationDetails();
       final platformChannelSpecifics = NotificationDetails(
         android: androidPlatformChannelSpecifics,
         iOS: iOSPlatformChannelSpecifics,
@@ -702,7 +699,7 @@ class BackgroundPush {
   AndroidNotificationDetails _getAndroidNotificationDetails(
       {MessagingStyleInformation styleInformation, String ticker}) {
     final color = (context != null ? Theme.of(context).primaryColor : null) ??
-        Color(0xFF5625BA);
+        const Color(0xFF5625BA);
 
     return AndroidNotificationDetails(
       AppConfig.pushNotificationsChannelId,

lib/utils/date_time_extension.dart

@@ -22,7 +22,7 @@ extension DateTimeExtension on DateTime {
   /// Two message events can belong to the same environment. That means that they
   /// don't need to display the time they were sent because they are close
   /// enaugh.
-  static final minutesBetweenEnvironments = 5;
+  static const minutesBetweenEnvironments = 5;
 
   /// Checks if two DateTimes are close enough to belong to the same
   /// environment.

lib/utils/famedlysdk_store.dart

@@ -31,7 +31,7 @@ class Store {
   static final _mutex = AsyncMutex();
 
   Store()
-      : secureStorage = PlatformInfos.isMobile ? FlutterSecureStorage() : null;
+      : secureStorage = PlatformInfos.isMobile ? const FlutterSecureStorage() : null;
 
   Future<void> _setupLocalStorage() async {
     if (storage == null) {

lib/utils/matrix_sdk_extensions.dart/flutter_matrix_hive_database.dart

@@ -55,7 +55,7 @@ class FlutterMatrixHiveStore extends FamedlySdkHiveDatabase {
       // Workaround for secure storage is calling Platform.operatingSystem on web
       if (kIsWeb) throw MissingPluginException();
 
-      final secureStorage = const FlutterSecureStorage();
+      const secureStorage = FlutterSecureStorage();
       final containsEncryptionKey =
           await secureStorage.containsKey(key: _hiveCipherStorageKey);
       if (!containsEncryptionKey) {

lib/utils/platform_infos.dart

@@ -53,11 +53,11 @@ abstract class PlatformInfos {
         ),
         OutlinedButton(
           onPressed: () => launch(AppConfig.emojiFontUrl),
-          child: Text(AppConfig.emojiFontName),
+          child: const Text(AppConfig.emojiFontName),
         ),
         OutlinedButton(
           onPressed: () => VRouter.of(context).to('logs'),
-          child: Text('Logs'),
+          child: const Text('Logs'),
         ),
         SentrySwitchListTile(label: L10n.of(context).sendBugReports),
       ],