feat: sync login email verification support

internal/rpc/errors_test.go

@@ -0,0 +1,15 @@
+package rpc
+
+import (
+	"testing"
+
+	"github.com/gotd/td/tgerr"
+
+	"telesrv/internal/domain"
+)
+
+func TestPasswordErrMapsOccupiedLoginEmailToNotAllowed(t *testing.T) {
+	if err := passwordErr(domain.ErrEmailOccupied); !tgerr.Is(err, "EMAIL_NOT_ALLOWED") {
+		t.Fatalf("passwordErr(ErrEmailOccupied) = %v, want EMAIL_NOT_ALLOWED", err)
+	}
+}