Уведомления в фоне, оптимизация FPS чата, release notes, read receipts паритет с Android

RosettaNotificationService/NotificationService.swift

@@ -0,0 +1,54 @@
+import UserNotifications
+
+/// Notification Service Extension — runs as a separate process even when the main app
+/// is terminated. Intercepts push notifications with `mutable-content: 1` and:
+/// 1. Adds `.default` sound for vibration (server payload has no sound)
+/// 2. Increments the app icon badge from shared App Group storage
+final class NotificationService: UNNotificationServiceExtension {
+
+    private static let appGroupID = "group.com.rosetta.dev"
+    private static let badgeKey = "app_badge_count"
+
+    private var contentHandler: ((UNNotificationContent) -> Void)?
+    private var bestAttemptContent: UNMutableNotificationContent?
+
+    override func didReceive(
+        _ request: UNNotificationRequest,
+        withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void
+    ) {
+        self.contentHandler = contentHandler
+        bestAttemptContent = request.content.mutableCopy() as? UNMutableNotificationContent
+
+        guard let content = bestAttemptContent else {
+            contentHandler(request.content)
+            return
+        }
+
+        // 1. Add sound for vibration — server APNs payload has no sound field.
+        content.sound = .default
+
+        // 2. Increment badge count from shared App Group storage.
+        if let shared = UserDefaults(suiteName: Self.appGroupID) {
+            let current = shared.integer(forKey: Self.badgeKey)
+            let newBadge = current + 1
+            shared.set(newBadge, forKey: Self.badgeKey)
+            content.badge = NSNumber(value: newBadge)
+        }
+
+        // 3. Ensure notification category for CarPlay parity.
+        if content.categoryIdentifier.isEmpty {
+            content.categoryIdentifier = "message"
+        }
+
+        contentHandler(content)
+    }
+
+    /// Called if the extension takes too long (30s limit).
+    /// Deliver the best attempt content with at least the sound set.
+    override func serviceExtensionTimeWillExpire() {
+        if let handler = contentHandler, let content = bestAttemptContent {
+            content.sound = .default
+            handler(content)
+        }
+    }
+}