chore(test): 清理测试用例与类型导入

backend/internal/pkg/geminicli/oauth_test.go

@@ -377,7 +377,7 @@ func TestBuildAuthorizationURL_EmptyRedirectURI(t *testing.T) {
 		OAuthConfig{},
 		"test-state",
 		"test-challenge",
-		"",       // 空 redirectURI
+		"", // 空 redirectURI
 		"",
 		"code_assist",
 	)

backend/internal/util/logredact/redact_test.go

@@ -28,9 +28,9 @@ func TestRedactText_QueryLike(t *testing.T) {
 }
 
 func TestRedactText_GOCSPX(t *testing.T) {
-	in := "client_secret=GOCSPX-abcdefghijklmnopqrstuvwxyz_0123456789"
+	in := "client_secret=GOCSPX-your-client-secret"
 	out := RedactText(in)
-	if strings.Contains(out, "abcdefghijklmnopqrstuvwxyz") {
+	if strings.Contains(out, "your-client-secret") {
 		t.Fatalf("expected secret redacted, got %q", out)
 	}
 	if !strings.Contains(out, "client_secret=***") {