simplified code across the app and consolidated duplicated helpers

lib/push/push_renderer.dart

@@ -203,16 +203,10 @@ class PushRenderer {
       messages: styleMessages,
     );
 
-    final androidDetails = AndroidNotificationDetails(
-      talkChannelId,
-      talkChannelName,
-      importance: Importance.high,
-      priority: Priority.high,
-      category: AndroidNotificationCategory.message,
-      color: _accentColor,
+    final androidDetails = _talkAndroidDetails(
       tag: tag,
+      style: messagingStyle,
       silent: !alert,
-      styleInformation: messagingStyle,
       actions: _talkActions,
     );
 
@@ -247,17 +241,11 @@ class PushRenderer {
       title: senderName,
       body: messageText,
       notificationDetails: NotificationDetails(
-        android: AndroidNotificationDetails(
-          talkChannelId,
-          talkChannelName,
-          importance: Importance.high,
-          priority: Priority.high,
-          category: AndroidNotificationCategory.message,
-          color: _accentColor,
+        android: _talkAndroidDetails(
           tag: tag,
           // Single sender ⇒ no conversationTitle (1:1 convention): the sender
           // Person is the header, a title would repeat the name per line.
-          styleInformation: MessagingStyleInformation(
+          style: MessagingStyleInformation(
             const Person(key: 'self', name: 'Ich'),
             groupConversation: false,
             messages: [
@@ -271,6 +259,25 @@ class PushRenderer {
     );
   }
 
+  static AndroidNotificationDetails _talkAndroidDetails({
+    required String tag,
+    required StyleInformation style,
+    AndroidNotificationCategory? category = AndroidNotificationCategory.message,
+    bool silent = false,
+    List<AndroidNotificationAction>? actions,
+  }) => AndroidNotificationDetails(
+    talkChannelId,
+    talkChannelName,
+    importance: Importance.high,
+    priority: Priority.high,
+    category: category,
+    color: _accentColor,
+    tag: tag,
+    silent: silent,
+    styleInformation: style,
+    actions: actions,
+  );
+
   // Both actions keep cancelNotification: true (the default): the plugin's
   // Java receiver then removes the card NATIVELY the moment the action fires.
   // The reply action must not rely on our Dart-side cancel instead — MIUI/
@@ -306,14 +313,10 @@ class PushRenderer {
       title: title,
       body: body,
       notificationDetails: NotificationDetails(
-        android: AndroidNotificationDetails(
-          talkChannelId,
-          talkChannelName,
-          importance: Importance.high,
-          priority: Priority.high,
-          color: _accentColor,
+        android: _talkAndroidDetails(
           tag: 'talk_error_$chatToken',
-          styleInformation: BigTextStyleInformation(body),
+          style: BigTextStyleInformation(body),
+          category: null,
         ),
         iOS: const DarwinNotificationDetails(),
       ),