feat: confirmar despesas recorrentes cria transação manual

Botão CONFIRMAR para despesas pendentes, igual ao fluxo de receitas.
Backend remove guard income-only no ConfirmIncome.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

apps/api/internal/service/recurring.go

@@ -110,21 +110,22 @@ func (s *RecurringService) MonthlyStatus(ctx context.Context, month string) ([]m
 	return result, nil
 }
 
-// ConfirmIncome creates an income transaction confirming receipt of this recurring income.
+// ConfirmIncome creates a transaction (income or expense) confirming this recurring item for the month.
 func (s *RecurringService) ConfirmIncome(ctx context.Context, id int, month string) error {
 	re, err := s.repo.GetByID(ctx, id)
 	if err != nil {
 		return err
 	}
-	if re.Type != "income" {
-		return ErrRecurringNotIncome
+	txType := re.Type
+	if txType == "" {
+		txType = "expense"
 	}
 	today := time.Now().Format("2006-01-02")
 	tx := model.Transaction{
 		Date:        today,
 		Amount:      re.ExpectedAmount,
 		Description: re.Name,
-		Type:        "income",
+		Type:        txType,
 		CategoryID:  re.CategoryID,
 	}
 	_, err = s.txRepo.Create(ctx, tx)