fix: Check account change

[SystemKeeper]

• Regression from Swift migration 2026 #2362

Compare to

talk-ios/NextcloudTalk/Rooms/NCRoomsManager.m

Lines 306 to 317 in 9dd660b

	- (void)checkForAccountChange:(NSString *)accountId
	{
	// Change account if notification is from another account
	if (accountId && ![[[NCDatabaseManager sharedInstance] activeAccount].accountId isEqualToString:accountId]) {
	// Leave chat before changing accounts
	if ([[NCRoomsManager sharedInstance] chatViewController]) {
	[[[NCRoomsManager sharedInstance] chatViewController] leaveChat];
	}
	// Set notification account active
	[[NCSettingsController sharedInstance] setActiveAccountWithAccountId:accountId];
	}
	}

We now left the chat for every push notification, which is not intended to do.