chore: disable username resolving

tgdb requires subscription
usinfobot requires `/start`

README-RU.md

@@ -159,4 +159,4 @@ Flatpak: https://github.com/0FL01/AyuGramDesktop-flatpak
 
 ### Боты
 
-- [TelegramDB](https://t.me/tgdatabase) для получения юзернейма по ID
+- [TelegramDB](https://t.me/tgdatabase) для получения юзернейма по ID (до закрытия бесплатной версии 2 апреля 2026)

README.md

@@ -161,4 +161,4 @@ Enjoy using **AyuGram**? Consider sending us a tip!
 
 ### Bots
 
-- [TelegramDB](https://t.me/tgdatabase) for username lookup by ID
+- [TelegramDB](https://t.me/tgdatabase) for username lookup by ID (until closing free inline mode at 2 April 2026)

Telegram/SourceFiles/ayu/utils/telegram_helpers.cpp

@@ -877,7 +877,8 @@ void searchPeerInner(const QString &peerId, Main::Session *session, const Userna
 }
 
 void searchPeer(const QString &peerId, Main::Session *session, const UsernameResolverCallback &callback) {
-	if (!session) {
+	callback(QString(), nullptr);
+	/*if (!session) {
 		callback(QString(), nullptr);
 		return;
 	}
@@ -893,7 +894,7 @@ void searchPeer(const QString &peerId, Main::Session *session, const UsernameRes
 			{
 				searchPeerInner(peerId, session, callback);
 			});
-	}
+	}*/
 }
 
 void searchUserById(ID userId, Main::Session *session, const UsernameResolverCallback &callback) {