feat: 完善智能体图片聊天与会话恢复

- 增加私有图片上传、绑定、历史回显与生命周期清理

- 支持输入草稿恢复、图片交互和模型图片能力约束

- 修复旧脏会话幂等删除与前端会话恢复

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

@@ -1,16 +1,18 @@
 <script setup lang="ts">
 import type {
   ChatTimelineItem,
+  ChatImageLoader,
   ChatTimelineMessageItem,
   ChatTimelineMessagePart,
   ChatTimelineToolApprovalPayload,
 } from './types';
 
-import {computed} from 'vue';
+import { computed } from 'vue';
 
 import ChatThinkingBlock from '../chat-thinking/ChatThinkingBlock.vue';
 import ChatErrorNotice from './ChatErrorNotice.vue';
 import ChatKnowledgeCard from './ChatKnowledgeCard.vue';
+import ChatImageAttachments from './ChatImageAttachments.vue';
 import ChatMessageToolbar from './ChatMessageToolbar.vue';
 import ChatTextBlock from './ChatTextBlock.vue';
 import ChatTimelineStatusRow from './ChatTimelineStatusRow.vue';
@@ -22,6 +24,7 @@ const props = defineProps<{
   regenerable?: boolean;
   regenerateDisabled?: boolean;
   assistantActionsVisible?: boolean;
+  imageLoader?: ChatImageLoader;
   item: ChatTimelineItem;
   variantLoading?: boolean;
 }>();
@@ -127,6 +130,12 @@ function updateThinkingExpanded(partId: string, expanded: boolean) {
         { 'has-variant-navigator': showVariantNavigator },
       ]"
     >
+      <ChatImageAttachments
+        v-if="messageItem.images?.length"
+        :items="messageItem.images"
+        :image-loader="imageLoader"
+        compact
+      />
       <template v-for="part in getMessageParts(messageItem)" :key="part.id">
         <ChatThinkingBlock
           v-if="part.type === 'thinking'"