fix: store the uncasefolded account name correctly

irc/accounts.go

@@ -578,18 +578,10 @@ type rawClientAccount struct {
 
 // LoginToAccount logs the client into the given account.
 func (client *Client) LoginToAccount(account string) {
-	casefoldedAccount, err := CasefoldName(account)
-	if err != nil {
-		return
-	}
-
-	if client.Account() == casefoldedAccount {
-		// already logged into this acct, no changing necessary
-		return
+	changed := client.SetAccountName(account)
+	if changed {
+		client.nickTimer.Touch()
 	}
-
-	client.SetAccountName(casefoldedAccount)
-	client.nickTimer.Touch()
 }
 
 // LogoutOfAccount logs the client out of their current account.

irc/getters.go

@@ -125,15 +125,21 @@ func (client *Client) AccountName() string {
 	return client.accountName
 }
 
-func (client *Client) SetAccountName(account string) {
+func (client *Client) SetAccountName(account string) (changed bool) {
 	var casefoldedAccount string
+	var err error
 	if account != "" {
-		casefoldedAccount, _ = CasefoldName(account)
+		if casefoldedAccount, err = CasefoldName(account); err != nil {
+			return
+		}
 	}
+
 	client.stateMutex.Lock()
 	defer client.stateMutex.Unlock()
+	changed = client.account != casefoldedAccount
 	client.account = casefoldedAccount
 	client.accountName = account
+	return
 }
 
 func (client *Client) HasMode(mode modes.Mode) bool {