Support visionOS in TDLib.

td/telegram/NotificationSound.cpp

@@ -256,7 +256,7 @@ unique_ptr<NotificationSound> get_notification_sound(telegram_api::peerNotifySet
   telegram_api::NotificationSound *sound =
 #if TD_ANDROID
       for_stories ? settings->stories_android_sound_.get() : settings->android_sound_.get();
-#elif TD_DARWIN_IOS || TD_DARWIN_TV_OS || TD_DARWIN_WATCH_OS
+#elif TD_DARWIN_IOS || TD_DARWIN_TV_OS || TD_DARWIN_VISION_OS || TD_DARWIN_WATCH_OS || TD_DARWIN_UNKNOWN
       for_stories ? settings->stories_ios_sound_.get() : settings->ios_sound_.get();
 #else
       for_stories ? settings->stories_other_sound_.get() : settings->other_sound_.get();

td/telegram/SecretChatsManager.cpp

@@ -168,7 +168,7 @@ void SecretChatsManager::on_update_chat(tl_object_ptr<telegram_api::updateEncryp
   PendingChatUpdate pending_update;
   pending_update.online_process_time_ = Timestamp::now();
   if (update->chat_->get_id() == telegram_api::encryptedChatRequested::ID) {
-#if TD_ANDROID || TD_DARWIN_IOS || TD_DARWIN_WATCH_OS || TD_TIZEN
+#if TD_ANDROID || TD_DARWIN_IOS
     pending_update.offline_process_time_ = Timestamp::in(1.0);
 #else
     pending_update.online_process_time_ = Timestamp::in(2.0);

td/telegram/net/ConnectionCreator.h

@@ -119,7 +119,7 @@ class ConnectionCreator final : public NetQueryCallback {
 
   struct ClientInfo {
     class Backoff {
-#if TD_ANDROID || TD_DARWIN_IOS || TD_DARWIN_WATCH_OS || TD_TIZEN
+#if TD_ANDROID || TD_DARWIN_IOS || TD_DARWIN_VISION_OS || TD_DARWIN_WATCH_OS || TD_TIZEN
       static constexpr int32 MAX_BACKOFF = 300;
 #else
       static constexpr int32 MAX_BACKOFF = 16;

tdutils/td/utils/port/platform.h

@@ -25,6 +25,8 @@
       #define TD_DARWIN_IOS 1
     #elif TARGET_OS_TV
       #define TD_DARWIN_TV_OS 1
+    #elif TARGET_OS_VISION
+      #define TD_DARWIN_VISION_OS 1
     #elif TARGET_OS_WATCH
       #define TD_DARWIN_WATCH_OS 1
     #else

tdutils/td/utils/port/uname.cpp

@@ -81,6 +81,8 @@ Slice get_operating_system_version() {
     return "iOS" + os_version;
 #elif TD_DARWIN_TV_OS
     return "tvOS" + os_version;
+#elif TD_DARWIN_VISIOM_OS
+    return "visionOS" + os_version;
 #elif TD_DARWIN_WATCH_OS
     return "watchOS" + os_version;
 #elif TD_DARWIN_MAC