快速编辑直接覆盖原图

将图片快速编辑提交切到 /api/editor/images/edits，并用结果回写源图层

保留重绘作为右侧新结果图层，角色重绘继续走 character 生成契约

更新快速编辑文档和定向回归测试

src/components/image-editor/ImageCanvasGenerationLayerModel.test.ts

@@ -5,6 +5,7 @@ import type {
   CanvasLayer,
 } from './ImageCanvasEditorTypes';
 import {
+  applyImageEditResultToSourceLayer,
   createAudioResultLayer,
   createCharacterAnimationResultLayer,
   createGeneratedResultLayer,
@@ -282,6 +283,46 @@ describe('ImageCanvasGenerationLayerModel', () => {
     });
   });
 
+  it('applies quick edits to the source layer in place', () => {
+    const sourceLayer = createSourceLayer({
+      width: 320,
+      height: 240,
+      originalWidth: 1024,
+      originalHeight: 768,
+    });
+    const layer = applyImageEditResultToSourceLayer({
+      generated: createGenerated({
+        imageSrc: 'data:image/png;base64,edited',
+        width: 1536,
+        height: 1024,
+        resource: {
+          resourceId: 'resource-edited',
+          objectKey: 'generated/edited.png',
+          assetObjectId: 'asset-object-edited',
+          width: 1536,
+          height: 1024,
+          sourceType: 'generated',
+          generationInputs: createGenerationInputs(),
+        },
+      }),
+      sourceLayer,
+      generationInputs: createGenerationInputs(),
+    });
+
+    expect(layer).toMatchObject({
+      id: 'layer-source',
+      title: '源图',
+      src: 'data:image/png;base64,edited',
+      width: 1536,
+      height: 1024,
+      originalWidth: 1536,
+      originalHeight: 1024,
+      resourceId: 'resource-edited',
+      sourceResourceId: 'resource-source',
+      objectKey: 'generated/edited.png',
+    });
+  });
+
   it('creates wrapped icon layers with icon metadata', () => {
     const layers = createIconSpritesheetResultLayers({
       generated: {