feat(goals): 总览新增目标管理(增/删/改),同步通知 planner 并复活任务

- 总览页新增「目标管理」卡片,支持人工查看/新增/修改/删除目标
- 新增/修改:通知 planner(新增了目标/由 old 变为 new)并复活任务
- 删除:硬删除 goal 节点(级联删边/锚点),通知 planner,不复活任务
- 无 schema 变更:目标仍存 exploration_nodes(kind='goal'),仅加查询方法

server/dto.go

@@ -173,6 +173,41 @@ func taskNodeDTO(n *db.Node) TaskNodeDTO {
 	return d
 }
 
+// GoalDTO is a goal node with its payload unpacked into text/vulnclass — the shape
+// the 总览「目标管理」UI works with (vs TaskNodeDTO which carries raw payload JSON).
+type GoalDTO struct {
+	ID        string `json:"id"`
+	Text      string `json:"text"`
+	VulnClass string `json:"vulnclass,omitempty"`
+	State     string `json:"state"`
+	Origin    string `json:"origin,omitempty"`
+	TS        string `json:"ts"`
+}
+
+func goalDTO(n *db.Node) GoalDTO {
+	var p struct {
+		Text      string `json:"text"`
+		VulnClass string `json:"vulnclass"`
+	}
+	_ = json.Unmarshal(n.Payload, &p)
+	return GoalDTO{
+		ID:        i64s(n.ID),
+		Text:      p.Text,
+		VulnClass: p.VulnClass,
+		State:     n.State,
+		Origin:    n.Origin,
+		TS:        rfc3339(n.CreatedAt),
+	}
+}
+
+func goalDTOs(in []*db.Node) []GoalDTO {
+	out := make([]GoalDTO, 0, len(in))
+	for _, n := range in {
+		out = append(out, goalDTO(n))
+	}
+	return out
+}
+
 func taskNodeDTOs(in []*db.Node) []TaskNodeDTO {
 	out := make([]TaskNodeDTO, 0, len(in))
 	for _, n := range in {