Preserve typing events in iOS FFI

apps/ios/TeleTuiIOS/Sources/TeleTuiIOSCore/Models.swift

@@ -173,6 +173,7 @@ public enum SessionEvent: Equatable, Sendable {
     case reactionChanged(Int64, Int64, [Reaction])
     case incomingNotificationCandidate(ChatSummary, Message, String)
     case networkChanged(NetworkState)
+    case typingChanged(TypingState)
     case draftChanged(Draft)
     case profileLoaded(Profile)
     case mediaDownloadProgress(fileId: Int32, downloadedSize: Int64, totalSize: Int64)
@@ -185,3 +186,8 @@ public enum NetworkState: Equatable, Sendable {
     case updating
     case ready
 }
+
+public enum TypingState: Equatable, Sendable {
+    case idle
+    case typing(chatId: Int64, userId: Int64, text: String)
+}

apps/ios/TeleTuiIOS/Sources/TeleTuiIOSCore/UniFfiSessionBridge.swift

@@ -155,6 +155,15 @@ public actor UniFfiSessionBridge: SessionBridge {
         }
     }
 
+    private static func mapTypingState(_ state: IosTypingState) -> TypingState {
+        switch state {
+        case .idle:
+            .idle
+        case let .typing(chatId, userId, text):
+            .typing(chatId: chatId, userId: userId, text: text)
+        }
+    }
+
     private static func mapFolder(_ folder: IosFolder) -> Folder {
         Folder(id: folder.id, name: folder.name)
     }
@@ -236,6 +245,8 @@ public actor UniFfiSessionBridge: SessionBridge {
             )
         case let .networkChanged(state):
             .networkChanged(mapNetworkState(state))
+        case let .typingChanged(state):
+            .typingChanged(mapTypingState(state))
         case let .draftChanged(draft):
             .draftChanged(mapDraft(draft))
         case let .profileLoaded(profile):

apps/ios/TeleTuiIOS/Sources/TeleTuiIOSCore/ViewModels.swift

@@ -6,6 +6,7 @@ public final class SessionStore: ObservableObject {
     @Published public private(set) var account: Account
     @Published public private(set) var authState: AuthState = .waitTdlibParameters
     @Published public private(set) var networkState: NetworkState = .ready
+    @Published public private(set) var typingState: TypingState = .idle
     @Published public private(set) var errorMessage: String?
 
     public let bridge: SessionBridge
@@ -40,6 +41,8 @@ public final class SessionStore: ObservableObject {
                 authState = state
             case let .networkChanged(state):
                 networkState = state
+            case let .typingChanged(state):
+                typingState = state
             default:
                 break
             }