diff --git a/docs/technical/【前端架构】图片画布编辑器MVP接入方案-2026-06-11.md b/docs/technical/【前端架构】图片画布编辑器MVP接入方案-2026-06-11.md
index 606389082..561cd54e3 100644
--- a/docs/technical/【前端架构】图片画布编辑器MVP接入方案-2026-06-11.md
+++ b/docs/technical/【前端架构】图片画布编辑器MVP接入方案-2026-06-11.md
@@ -160,7 +160,7 @@
 - 快速编辑 / 重绘站内 public 示例图、历史 generated 图或 OSS generated 图时，优先复用当前图层已有 `objectKey` / `resourceId` / `sourceAssetId`；尚未登记且没有稳定引用的浏览器本地图片或普通 public 图片路径都必须先上传并取得 objectKey。前端不得再把正式对象下载成 `data:image/*;base64,...` 后提交，也不得把 Data URL / Blob URL 写入外部生成持久任务 JSON；后端收到引用后统一做 owner 归属校验并签名读取。
 - 快速编辑不保留额外参考图入口；点击修改时只把原图或红框序号标注图作为 `/api/editor/images/edits` 的 `sourceImageSrc` 提交给后端。
 - 素材文件夹可以新建、折叠、重命名和删除；删除普通文件夹后，其素材移动到“项目素材”。普通上传默认落入“上传素材”文件夹；素材库缺少该文件夹时，前端在首次普通上传前创建一次并复用，拖到指定文件夹或点击指定文件夹上传时仍进入目标文件夹。
-- 上传按钮和拖拽上传都支持多文件；底部工具栏的上传入口选择文件后直接进入“上传素材”并在当前画布视口中心创建画布图层，素材栏文件夹内的上传入口只写入对应素材文件夹、不自动入画布；拖到文件夹或该文件夹内素材时进入目标文件夹；拖到画布时进入“上传素材”并在投放点创建画布图层。上传图片必须在创建占位素材、画布图层和账号级素材记录前先读取原图 Resolution，图层宽高、`originalWidth/originalHeight` 和素材库 `width/height` 都使用图片本身尺寸；上传视频同样在创建素材和图层前读取视频 metadata 宽高，保证单层下载或 ZIP 导出的真实视频文件重新导入后仍按文件自身尺寸入画布；仅在无法解析尺寸时才使用对应媒体兜底尺寸。
+- 上传按钮和拖拽上传都支持多文件；底部工具栏的上传入口选择文件后直接进入“上传素材”并在当前画布视口中心创建画布图层，素材栏文件夹内的上传入口只写入对应素材文件夹、不自动入画布；拖到文件夹或该文件夹内素材时进入目标文件夹；拖到画布时进入“上传素材”并在投放点创建画布图层。上传图片必须在创建占位素材、画布图层和账号级素材记录前先读取原图 Resolution，图层宽高、`originalWidth/originalHeight` 和素材库 `width/height` 都使用图片本身尺寸；上传视频同样在创建素材和图层前读取视频 metadata 宽高，保证单层下载或 ZIP 导出的真实视频文件重新导入后仍按文件自身尺寸入画布；仅在无法解析尺寸时才使用对应媒体兜底尺寸。OSS 直传确认成功后，即时占位素材、即时画布图层和补充图片尺寸探测必须使用本次换签得到的 signed URL，不得把私有对象的裸 `/generated-*` 兼容路径交给浏览器读取；账号素材持久化仍只写 `legacyPublicPath`、`objectKey` 和 `assetObjectId`，禁止把会过期的 signed URL 写入资源或素材记录。
 - 音频 / 视频素材卡和画布媒体图层必须提供稳定的非文字视觉预览：优先使用 `thumbnailSrc` / 视频 `poster`，没有真实首帧或音频封面时使用由媒体类型、素材名和地址派生的确定性视觉底图。视频图层使用原生 `<video controls preload="metadata" playsInline>` 播放，外层图层仍承接选择和拖拽语义；音频图层播放前继续通过 `/api/assets/read-url` 换签。画布素材导出按 `mediaType` 保留真实媒体格式：图片进入 `images/`，音频 / 视频进入 `media/`，文件扩展名从响应 MIME、`objectKey` 或源 URL 推断，不得把音频 / 视频导出成 PNG。
 - 画布素材 ZIP 的 `metadata.json` 只保存前端信息弹窗和导出文件列表可见的展示快照：项目标题、导出时间、图层标题、文件路径、类型、生成输入、模型显示名、Task 短 ID、Object 显示值、Resolution / 时长和导出错误。导出的生成输入只保留用户实际填写或选择的内容；系统默认兜底提示词、固定工作流提示词、内置图标描述、UI 提取素材固定提示词等内置提示词即使存在于历史 `generationInputs`，也不得写入导出元数据。不得把 `projectId`、`layerId`、`resourceId`、`sourceAssetId`、`sourceResourceId`、原始 `prompt` / `actualPrompt` / `provider` 或画布坐标、锁定、隐藏等布局状态写入导出元数据；Object 字段仅沿用信息弹窗当前可见值。
 - `生成角色动作` 的完成结果按序列帧素材处理：图层主 `src` 使用 `frames[0].imageSrc`，`mediaType` 固定为 `image-sequence`，`assetKind` 固定为 `character-animation`，完整帧列表写入 `imageSequenceFrames`；`previewVideoPath` 只保留为上游预览视频来源，不作为画布主媒体。下载和 ZIP 导出必须因此得到序列帧 ZIP / frames 目录，不能回退为预览视频或首帧 PNG；后端抽帧后逐帧保存带绿幕源图，上传时消费并释放原帧字节，再用该对象的 600 秒 OSS URL 完成透明化并落盘透明帧素材。
diff --git a/src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx b/src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx
index 30e2b669c..b37bf2181 100644
--- a/src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx
+++ b/src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx
@@ -8,7 +8,7 @@ import {
   waitFor,
 } from '@testing-library/react';
 import { useRef, useState } from 'react';
-import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 
 import { ApiClientError } from '../../services/apiClient';
 import type {
@@ -195,7 +195,7 @@ function UploadWorkflowHarness({
         {assets
           .map(
             (asset) =>
-              `${asset.id}:${asset.label}:${asset.folderId}:${asset.uploadStatus ?? 'ready'}:${asset.uploadMessage ?? '-'}:${asset.width}x${asset.height}`,
+              `${asset.id}:${asset.label}:${asset.folderId}:${asset.uploadStatus ?? 'ready'}:${asset.uploadMessage ?? '-'}:${asset.width}x${asset.height}:${asset.src}`,
           )
           .join('|')}
       </span>
@@ -211,7 +211,7 @@ function UploadWorkflowHarness({
         {layers
           .map(
             (layer) =>
-              `${layer.id}:${layer.title}:${layer.sourceAssetId}:${layer.x}:${layer.y}:${layer.width}x${layer.height}:${layer.objectKey ?? '-'}`,
+              `${layer.id}:${layer.title}:${layer.sourceAssetId}:${layer.x}:${layer.y}:${layer.width}x${layer.height}:${layer.objectKey ?? '-'}:${layer.src}`,
           )
           .join('|')}
       </span>
@@ -380,6 +380,10 @@ function UploadWorkflowHarness({
 }
 
 describe('useImageCanvasUploadWorkflow', () => {
+  afterEach(() => {
+    vi.unstubAllGlobals();
+  });
+
   beforeEach(() => {
     vi.clearAllMocks();
     createEditorAssetMock.mockImplementation(async (input) => ({
@@ -531,6 +535,19 @@ describe('useImageCanvasUploadWorkflow', () => {
   });
 
   it('creates an uploading asset card, adds a canvas layer, keeps the sidebar, and patches the layer with the persisted asset id', async () => {
+    const measuredImageSources: string[] = [];
+    vi.stubGlobal(
+      'Image',
+      class {
+        naturalWidth = 0;
+        naturalHeight = 0;
+        onload: (() => void) | null = null;
+
+        set src(value: string) {
+          measuredImageSources.push(value);
+        }
+      },
+    );
     const deferredAsset = createDeferred<{
       assetId: string;
       folderId: string;
@@ -549,10 +566,10 @@ describe('useImageCanvasUploadWorkflow', () => {
 
     await waitFor(() => {
       expect(screen.getByTestId('assets').textContent).toContain(
-        'upload-1:画布素材.png:folder-uploaded:uploading:上传中',
+        'upload-1:画布素材.png:folder-uploaded:uploading:上传中:420x315:https://signed.example.com/editor/image/画布素材.png',
       );
       expect(screen.getByTestId('layers').textContent).toContain(
-        'layer-upload-1:画布素材.png:upload-1:-160:-107.5:420x315:generated-character-drafts/editor/asset-library/image/画布素材.png',
+        'layer-upload-1:画布素材.png:upload-1:-160:-107.5:420x315:generated-character-drafts/editor/asset-library/image/画布素材.png:https://signed.example.com/editor/image/画布素材.png',
       );
     });
     expect(uploadEditorMediaAssetFileMock).toHaveBeenCalledWith(
@@ -568,6 +585,12 @@ describe('useImageCanvasUploadWorkflow', () => {
         assetObjectId: 'assetobj-editor-image',
       }),
     );
+    expect(measuredImageSources).toContain(
+      'https://signed.example.com/editor/image/画布素材.png',
+    );
+    expect(measuredImageSources).not.toContain(
+      '/generated-character-drafts/editor/asset-library/image/画布素材.png',
+    );
     expect(screen.getByTestId('sidebar').textContent).toBe('assets');
     expect(screen.getByTestId('selected-layer').textContent).toBe(
       'layer-upload-1',
@@ -577,7 +600,8 @@ describe('useImageCanvasUploadWorkflow', () => {
       assetId: 'asset-persisted-canvas',
       folderId: 'folder-uploaded',
       label: '画布素材.png',
-      imageSrc: 'data:image/png;base64,Y2FudmFz',
+      imageSrc:
+        '/generated-character-drafts/editor/asset-library/image/画布素材.png',
       width: 420,
       height: 315,
       sourceType: 'uploaded',
@@ -587,10 +611,10 @@ describe('useImageCanvasUploadWorkflow', () => {
 
     await waitFor(() => {
       expect(screen.getByTestId('assets').textContent).toContain(
-        'asset-persisted-canvas:画布素材.png:folder-uploaded:ready:-',
+        'asset-persisted-canvas:画布素材.png:folder-uploaded:ready:-:420x315:https://signed.example.com/editor/image/画布素材.png',
       );
       expect(screen.getByTestId('layers').textContent).toContain(
-        'layer-upload-1:画布素材.png:asset-persisted-canvas:-160:-107.5',
+        'layer-upload-1:画布素材.png:asset-persisted-canvas:-160:-107.5:420x315:object-key-canvas:https://signed.example.com/editor/image/画布素材.png',
       );
     });
   });
diff --git a/src/components/image-editor/useImageCanvasUploadWorkflow.ts b/src/components/image-editor/useImageCanvasUploadWorkflow.ts
index d73d0fecc..10a4e5389 100644
--- a/src/components/image-editor/useImageCanvasUploadWorkflow.ts
+++ b/src/components/image-editor/useImageCanvasUploadWorkflow.ts
@@ -976,7 +976,8 @@ export function useImageCanvasUploadWorkflow({
         }),
       );
 
-      let imageSrc = '';
+      let previewSrc = '';
+      let persistedImageSrc = '';
       let objectKey: string | null = null;
       let assetObjectId: string | null = null;
       let durationSeconds: number | undefined;
@@ -989,14 +990,15 @@ export function useImageCanvasUploadWorkflow({
             ));
         }
         const uploadedMedia = await uploadEditorMediaAssetFile(file, mediaType);
-        imageSrc = uploadedMedia.legacyPublicPath;
+        previewSrc = uploadedMedia.src;
+        persistedImageSrc = uploadedMedia.legacyPublicPath;
         objectKey = uploadedMedia.objectKey;
         assetObjectId = uploadedMedia.assetObjectId;
         setAssets((currentAssets) =>
           applyUploadAssetReadSuccess({
             assets: currentAssets,
             uploadAssetId: uploadedAsset.id,
-            imageSrc,
+            imageSrc: previewSrc,
           }),
         );
       } catch {
@@ -1012,7 +1014,7 @@ export function useImageCanvasUploadWorkflow({
       const nextLayer = createUploadCanvasLayer({
         uploadIndex,
         fileName: file.name,
-        imageSrc,
+        imageSrc: previewSrc,
         objectKey,
         assetObjectId,
         mediaType,
@@ -1038,7 +1040,7 @@ export function useImageCanvasUploadWorkflow({
       createEditorAsset({
         folderId: uploadFolderId,
         label: uploadedAsset.label,
-        imageSrc,
+        imageSrc: persistedImageSrc,
         ...(objectKey ? { objectKey } : {}),
         ...(assetObjectId ? { assetObjectId } : {}),
         width: uploadedAsset.width,
@@ -1047,11 +1049,15 @@ export function useImageCanvasUploadWorkflow({
         ...(durationSeconds ? { durationSeconds } : {}),
       })
         .then((asset) => {
+          const persistedAssetWithPreview = {
+            ...asset,
+            imageSrc: previewSrc,
+          };
           setAssets((currentAssets) =>
             applyPersistedUploadAsset({
               assets: currentAssets,
               uploadAssetId: uploadedAsset.id,
-              persistedAsset: asset,
+              persistedAsset: persistedAssetWithPreview,
             }),
           );
           if (options.addToCanvas) {
@@ -1059,7 +1065,7 @@ export function useImageCanvasUploadWorkflow({
               bindUploadLayerToPersistedAsset({
                 layers: currentLayers,
                 layerId: nextLayer.id,
-                persistedAsset: asset,
+                persistedAsset: persistedAssetWithPreview,
               }),
             );
           }
@@ -1078,7 +1084,7 @@ export function useImageCanvasUploadWorkflow({
           );
         });
 
-      if (mediaType === 'image' && imageSrc) {
+      if (mediaType === 'image' && previewSrc) {
         const uploadedImage = new Image();
         uploadedImage.onload = () => {
           const originalWidth =
@@ -1110,7 +1116,7 @@ export function useImageCanvasUploadWorkflow({
             }),
           );
         };
-        uploadedImage.src = imageSrc;
+        uploadedImage.src = previewSrc;
       }
     },
     [