core, iOS: hidden and muted user profiles (#2025)

* core, ios: profile privacy design

* migration

* core: user profile privacy

* update nix dependencies

* update simplexmq

* import stateTVar

* update core library

* update UI

* update hide/show user profile

* update API, UI, fix test

* update api, UI, test

* update api call

* fix api

* update UI for hidden profiles

* filter notifications on hidden/muted profiles when inactive, alerts

* updates

* update schema, test, icon

apps/ios/Shared/Model/ChatModel.swift

@@ -67,6 +67,31 @@ final class ChatModel: ObservableObject {
 
     static var ok: Bool { ChatModel.shared.chatDbStatus == .ok }
 
+    func getUser(_ userId: Int64) -> User? {
+        currentUser?.userId == userId
+        ? currentUser
+        : users.first { $0.user.userId == userId }?.user
+    }
+
+    func getUserIndex(_ user: User) -> Int? {
+        users.firstIndex { $0.user.userId == user.userId }
+    }
+
+    func updateUser(_ user: User) {
+        if let i = getUserIndex(user) {
+            users[i].user = user
+        }
+        if currentUser?.userId == user.userId {
+            currentUser = user
+        }
+    }
+
+    func removeUser(_ user: User) {
+        if let i = getUserIndex(user), users[i].user.userId != currentUser?.userId {
+            users.remove(at: i)
+        }
+    }
+
     func hasChat(_ id: String) -> Bool {
         chats.first(where: { $0.id == id }) != nil
     }