fix: accept legacy login payload

backend/internal/http/handler/auth_handler.go

@@ -53,10 +53,24 @@ func (h *Handler) Login(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if req.Username == "" {
+		req.Username = req.Identificador
+	}
+	if req.Username == "" {
+		req.Username = req.Email
+	}
+	if req.Password == "" {
+		req.Password = req.Senha
+	}
+
 	if req.Username == "" {
 		writeError(w, http.StatusBadRequest, errors.New("username is required"))
 		return
 	}
+	if req.Password == "" {
+		writeError(w, http.StatusBadRequest, errors.New("password is required"))
+		return
+	}
 
 	token, exp, err := h.svc.Login(r.Context(), req.Username, req.Password)
 	if err != nil {

backend/internal/http/handler/dto.go

@@ -55,7 +55,9 @@ type registerCompanyTarget struct {
 type loginRequest struct {
 	Username      string `json:"username,omitempty"`
 	Email         string `json:"email,omitempty"`
-	Password string `json:"password"`
+	Password      string `json:"password,omitempty"`
+	Identificador string `json:"identificador,omitempty"`
+	Senha         string `json:"senha,omitempty"`
 }
 
 type forgotPasswordRequest struct {