fix: improve endgame clock and gameplay stability

internal/sdkserver/before_verify_test.go

@@ -0,0 +1,22 @@
+package sdkserver
+
+import (
+	"encoding/json"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestBeforeVerifyReturnsDataObject(t *testing.T) {
+	w := httptest.NewRecorder()
+	beforeVerifyReply(w)
+	var body struct {
+		Retcode int            `json:"retcode"`
+		Data    map[string]any `json:"data"`
+	}
+	if err := json.Unmarshal(w.Body.Bytes(), &body); err != nil {
+		t.Fatal(err)
+	}
+	if w.Code != 200 || body.Retcode != 0 || body.Data == nil {
+		t.Fatalf("beforeVerify response cannot initialize SDK data: %s", w.Body.String())
+	}
+}