feat: 完善 Agent 标准交互与安全运行时

- 接入 AG-UI 运行投影、Turn 时间线和审批隔离

- 增加 Agent Skill 冻结绑定与运行时消费闭环

- 增加受控工作区、内置工具和私有 Artifact 生命周期

easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/ChatTimelineItem.vue

@@ -1,5 +1,6 @@
 <script setup lang="ts">
 import type {
+  ChatArtifactLoader,
   ChatDocumentLoader,
   ChatImageLoader,
   ChatTimelineItem,
@@ -11,6 +12,7 @@ import type {
 import { computed, ref } from 'vue';
 
 import ChatThinkingBlock from '../chat-thinking/ChatThinkingBlock.vue';
+import ChatArtifactAttachment from './ChatArtifactAttachment.vue';
 import ChatAssistantAvatar from './ChatAssistantAvatar.vue';
 import ChatDocumentAttachments from './ChatDocumentAttachments.vue';
 import ChatErrorNotice from './ChatErrorNotice.vue';
@@ -23,6 +25,7 @@ import ChatToolCard from './ChatToolCard.vue';
 
 const props = defineProps<{
   approvalLoading?: boolean;
+  artifactLoader?: ChatArtifactLoader;
   assistantActionsVisible?: boolean;
   assistantAvatar?: string;
   copyable?: boolean;
@@ -256,6 +259,11 @@ function handleCopyAction() {
       @approve="emit('approve', $event)"
       @reject="emit('reject', $event)"
     />
+    <ChatArtifactAttachment
+      v-else-if="item.type === 'artifact'"
+      :artifact-loader="artifactLoader"
+      :item="item"
+    />
     <ChatKnowledgeCard
       v-else-if="item.type === 'knowledge'"
       :items="item.items"