fix: validate tunnel probe target before cleanup

go-backend/internal/http/handler/tunnel_probe_target_api_test.go

@@ -99,6 +99,42 @@ func TestTunnelCreateRejectsInvalidProbeTarget(t *testing.T) {
 	}
 }
 
+func TestTunnelUpdateInvalidProbeTargetDoesNotCleanFederationBindings(t *testing.T) {
+	h := setupProbeTargetTunnelHandler(t)
+	seedProbeTargetTunnel(t, h, 88, "existing", "old.example.com", 9443)
+	seedProbeTargetFederationBinding(t, h, 88)
+	body := bytes.NewReader([]byte(`{
+		"id":88,
+		"name":"existing",
+		"type":1,
+		"flow":1,
+		"trafficRatio":1,
+		"status":1,
+		"inNodeId":[{"nodeId":10,"protocol":"tls"}],
+		"probeTargetHost":"https://example.com",
+		"probeTargetPort":443
+	}`))
+
+	res := httptest.NewRecorder()
+	h.tunnelUpdate(res, httptest.NewRequest(http.MethodPost, "/api/v1/tunnel/update", body))
+	var payload struct {
+		Code int    `json:"code"`
+		Msg  string `json:"msg"`
+	}
+	decodeProbeTargetResponse(t, res, &payload)
+	if payload.Code == 0 || payload.Msg == "" {
+		t.Fatalf("expected validation failure, got %+v", payload)
+	}
+
+	bindings, err := h.repo.ListActiveFederationTunnelBindingsByTunnel(88)
+	if err != nil {
+		t.Fatalf("list federation bindings: %v", err)
+	}
+	if len(bindings) != 1 {
+		t.Fatalf("expected federation binding to remain after invalid update, got %d", len(bindings))
+	}
+}
+
 func setupProbeTargetTunnelHandler(t *testing.T) *Handler {
 	t.Helper()
 	r, err := repo.Open(filepath.Join(t.TempDir(), "panel.db"))
@@ -134,6 +170,17 @@ func seedProbeTargetTunnel(t *testing.T, h *Handler, id int64, name string, host
 	}
 }
 
+func seedProbeTargetFederationBinding(t *testing.T, h *Handler, tunnelID int64) {
+	t.Helper()
+	now := time.Now().UnixMilli()
+	if err := h.repo.DB().Exec(`
+		INSERT INTO federation_tunnel_binding(tunnel_id, node_id, chain_type, hop_inx, remote_url, resource_key, remote_binding_id, allocated_port, status, created_time, updated_time)
+		VALUES(?, 10, 1, 0, 'http://peer.example', ?, 'remote-binding', 30001, 1, ?, ?)
+	`, tunnelID, "probe-target-test-binding", now, now).Error; err != nil {
+		t.Fatalf("insert federation binding: %v", err)
+	}
+}
+
 func assertProbeTargetSuccess(t *testing.T, res *httptest.ResponseRecorder) {
 	t.Helper()
 	var payload struct {