fix: show actual currency symbol in set rate confirmation

processRateInput was passing empty string to CurrencySymbol, causing
it to default to '$' instead of the user's configured currency.

internal/handler/settings.go

@@ -562,8 +562,13 @@ func (h *Handler) processRateInput(ctx context.Context, msg *models.Message, use
 	}
 	h.saveRate(ctx, msg.Chat.ID, user, rate)
 	backKB := settingsBackKeyboard()
+	st, _ := h.Repo.GetOrCreateSettings(user.ID)
+	sym := "$"
+	if st != nil && st.Currency != "" {
+		sym = domain.CurrencySymbol(st.Currency)
+	}
 	h.editText(ctx, msg.Chat.ID, pi.MsgID,
-		fmt.Sprintf("Hourly rate set to %s%.2f", domain.CurrencySymbol(""), rate), &backKB)
+		fmt.Sprintf("Hourly rate set to %s%.2f", sym, rate), &backKB)
 }
 
 func (h *Handler) processCurrencyInput(ctx context.Context, msg *models.Message, user *domain.User, pi *PendingInput, text string) {