diff --git a/docs/【编辑器】画布Agent对话面板-2026-07-03.md b/docs/【编辑器】画布Agent对话面板-2026-07-03.md
index 4f60749bb..6329638a0 100644
--- a/docs/【编辑器】画布Agent对话面板-2026-07-03.md
+++ b/docs/【编辑器】画布Agent对话面板-2026-07-03.md
@@ -74,7 +74,7 @@
 - 附件选择弹窗使用 `PlatformToolModalShell` 承接 portal 主题变量和不透明 panel 背景；不能直接把未注入 `platform-theme` 的 `UnifiedModal` portal 到 `document.body`，否则 `--platform-modal-fill` 失效后面板会变透明。
 - 应用后附件以胶囊 chip 挂在输入框上方；发出的消息内附件渲染为纯文本胶囊 chip（名称 + 小图标），**默认无缩略图，鼠标悬浮才浮出缩略图预览**。
 - 附件领域形状：统一为画布资源 / 素材库对象引用（`resourceId` / `assetId` + 可选 `objectKey`），不存在只属于对话的第三种图；单条消息上限 9 张（前后端共同校验）。前端可携带展示用 `imageSrc` / `thumbnailSrc`，后端必须按当前工程和当前账号重新归一、校验归属与 `objectKey`。
-- 输入区附件临时状态统一收口到 `useConversationAttachments`，选择弹窗由独立的 `AttachmentPicker` 负责纯展示；选择、引用、粘贴上传完成、移除、发送清空和失败恢复都必须经同一最新状态更新入口。发送失败时，已发送附件必须与等待期间新增的附件去重合并，不得因输入区已非空而丢弃；合并后超过 9 张时优先保留等待期间的最新附件，不恢复失败请求的附件，并立即显示上限错误。异步粘贴完成时基于当时的最新附件去重并重新校验 9 张上限，不能用上传开始时捕获的旧列表覆盖期间新增的引用。
+- 输入区附件临时状态统一收口到 `useConversationAttachments`，选择弹窗由独立的 `AttachmentPicker` 负责纯展示；选择、引用、粘贴上传完成、移除、发送清空和失败恢复都必须经同一最新状态更新入口。引用历史消息附件时先保留消息中的展示快照，最终发送前再按 `source + referenceId` 从当前画布和素材库选项刷新，避免提前刷新后又被失败恢复的旧快照覆盖。发送失败时，已发送附件必须与等待期间新增的附件去重合并，不得因输入区已非空而丢弃；合并后超过 9 张时优先保留等待期间的最新附件，不恢复失败请求的附件，并立即显示上限错误。异步粘贴完成时基于当时的最新附件去重并重新校验 9 张上限，不能用上传开始时捕获的旧列表覆盖期间新增的引用。
 
 ## 工具调用确认展示契约
 
diff --git a/src/components/image-editor/EditorAgentConversation/EditorAgentConversationPanelView.test.tsx b/src/components/image-editor/EditorAgentConversation/EditorAgentConversationPanelView.test.tsx
index a275dbb4b..4f49fd310 100644
--- a/src/components/image-editor/EditorAgentConversation/EditorAgentConversationPanelView.test.tsx
+++ b/src/components/image-editor/EditorAgentConversation/EditorAgentConversationPanelView.test.tsx
@@ -617,7 +617,7 @@ describe('EditorAgentConversationPanelView', () => {
     });
   });
 
-  it('prefers the current attachment matched by source and reference id', async () => {
+  it('refreshes an attachment matched by source and reference id when sending', async () => {
     const client = createClient();
     vi.mocked(client.getConversation).mockResolvedValue({
       conversationId: 'conversation-1',
@@ -673,7 +673,10 @@ describe('EditorAgentConversationPanelView', () => {
     const historicalAttachment = await screen.findByText('旧版附件');
     fireEvent.contextMenu(historicalAttachment.closest('.group')!);
     fireEvent.click(screen.getByRole('menuitem', { name: '引用' }));
-    expect(await screen.findByText('最新附件')).toBeTruthy();
+    await waitFor(() => {
+      expect(screen.getAllByText('旧版附件')).toHaveLength(2);
+    });
+    expect(screen.queryByText('最新附件')).toBeNull();
 
     fireEvent.click(screen.getByRole('button', { name: '发送' }));
     await waitFor(() => {
diff --git a/src/components/image-editor/EditorAgentConversation/useConversationAttachments.ts b/src/components/image-editor/EditorAgentConversation/useConversationAttachments.ts
index 5254cc524..130b095e0 100644
--- a/src/components/image-editor/EditorAgentConversation/useConversationAttachments.ts
+++ b/src/components/image-editor/EditorAgentConversation/useConversationAttachments.ts
@@ -259,22 +259,22 @@ export function useConversationAttachments({
 
   const referenceContextAsset = useCallback(
     (asset: EditorAgentContextAsset) => {
-      const directAttachment: EditorAgentAttachmentRef | undefined =
-        asset.kind === 'attachment'
-          ? {
-              source: asset.source,
-              referenceId: asset.referenceId,
-              objectKey: asset.objectKey,
-              imageSrc: asset.imageSrc,
-              thumbnailSrc: asset.thumbnailSrc,
-              label: asset.label,
-              width: asset.width,
-              height: asset.height,
-            }
-          : undefined;
-      const referenceOption = directAttachment
-        ? attachmentOptionsByKey.get(attachmentKey(directAttachment))
-        : undefined;
+      if (asset.kind === 'attachment') {
+        const directAttachment: EditorAgentAttachmentRef = {
+          source: asset.source,
+          referenceId: asset.referenceId,
+          objectKey: asset.objectKey,
+          imageSrc: asset.imageSrc,
+          thumbnailSrc: asset.thumbnailSrc,
+          label: asset.label,
+          width: asset.width,
+          height: asset.height,
+        };
+        return directAttachment.referenceId.trim() &&
+          directAttachment.imageSrc.trim()
+          ? appendAttachments([directAttachment])
+          : false;
+      }
       const objectKey = asset.objectKey?.trim();
       const mediaSrc = contextAssetMediaSrc(asset).trim();
       const objectKeyOption = objectKey
@@ -290,14 +290,13 @@ export function useConversationAttachments({
             attachment.thumbnailSrc?.trim() === mediaSrc
           );
         });
-      const matchedAttachment =
-        referenceOption?.attachment || option?.attachment || directAttachment;
+      const matchedAttachment = option?.attachment;
       return matchedAttachment?.referenceId.trim() &&
         matchedAttachment.imageSrc.trim()
         ? appendAttachments([matchedAttachment])
         : false;
     },
-    [appendAttachments, attachmentOptions, attachmentOptionsByKey],
+    [appendAttachments, attachmentOptions],
   );
 
   const handleInputPaste = useCallback(
@@ -361,9 +360,14 @@ export function useConversationAttachments({
 
   const consumeAttachments = useCallback(() => {
     const currentAttachments = attachmentsRef.current;
+    const refreshedAttachments = currentAttachments.map(
+      (attachment) =>
+        attachmentOptionsByKey.get(attachmentKey(attachment))?.attachment ??
+        attachment,
+    );
     updateAttachments([]);
-    return currentAttachments;
-  }, [updateAttachments]);
+    return refreshedAttachments;
+  }, [attachmentOptionsByKey, updateAttachments]);
 
   const restoreAttachments = useCallback(
     (failedAttachments: EditorAgentAttachmentRef[]) => {