修复图片改造尺寸保持

保持图片改造提交与画布回填的原图尺寸
在 VectorEngine 边界对齐非 16 倍数参考图并恢复目标尺寸
补充前后端回归测试与编辑器尺寸契约文档

src/components/image-editor/ImageCanvasGenerationSubmissionModel.ts

@@ -41,11 +41,8 @@ import {
   DEFAULT_VIDEO_WEB_SEARCH_ENABLED,
   ICON_DESCRIPTION_LIMIT,
   IMAGE_MODEL_GPT_IMAGE_2,
-  inferEditorImageAspectRatio,
-  inferEditorImageSizeLabel,
   normalizeEditorImageModel,
   resolveCharacterAnimationSourceImageSrc,
-  resolveEditorImageGenerationPixelSize,
   SEEDANCE_VIDEO_REFERENCE_LIMITS,
   SPEC_GENERATION_ASPECT_RATIO,
   SPEC_GENERATION_IMAGE_SIZE,
@@ -260,29 +257,12 @@ export function buildImageGenerationSubmissionPlan({
     const basePrompt = dialog.prompt.trim() || '快速编辑图片';
     const normalizedQuickEditPrompt = basePrompt;
     const imageModel = IMAGE_MODEL_GPT_IMAGE_2;
-    const aspectRatio =
-      dialog.aspectRatio ??
-      inferEditorImageAspectRatio(
-        sourceLayer.originalWidth,
-        sourceLayer.originalHeight,
-      );
-    const imageSize =
-      dialog.imageSize ??
-      inferEditorImageSizeLabel(
-        sourceLayer.originalWidth,
-        sourceLayer.originalHeight,
-      );
-    const outputSize = resolveEditorImageGenerationPixelSize({
-      model: imageModel,
-      aspectRatio,
-      imageSize,
-    });
     return {
       kind: 'quick-edit',
       normalizedPrompt: normalizedQuickEditPrompt,
       sourceLayer,
       editInput: {
-        size: `${outputSize.width}x${outputSize.height}`,
+        size: `${sourceLayer.originalWidth}x${sourceLayer.originalHeight}`,
         model: imageModel,
       },
       result: {