fix(ecommerce): show generated images in all tool previews

The set/detail preview areas were using static placeholder images
instead of the API-generated results. Fix:

- Add productSetResultImages state for set tool results
- Add detailResultUrl state for detail tool results
- Create setPreviewCards (like clonePreviewCards) that overlays
  generated URLs onto static card templates
- Replace setPreview JSX references from productSetPreviewCards
  to setPreviewCards so generated URLs are displayed
- Replace detailPreview longPage image with detailResultUrl fallback
- Update handleSetGenerate setResultFn to save URLs via
  setProductSetResultImages
- Update handleDetailGenerate setResultFn to save URL via
  setDetailResultUrl

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/features/ecommerce/EcommercePage.tsx

@@ -773,6 +773,7 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
   const [productSetRequirement, setProductSetRequirement] = useState("");
   const [productSetOutput, setProductSetOutput] = useState<ProductSetOutputKey>("video");
   const [productSetStatus, setProductSetStatus] = useState<ProductSetStatus>("idle");
+  const [productSetResultImages, setProductSetResultImages] = useState<string[]>([]);
   const [isSetUploadDragging, setIsSetUploadDragging] = useState(false);
   const [selectedProductSetPreview, setSelectedProductSetPreview] = useState<{ src: string; label: string } | null>(null);
   const [showHostingModal, setShowHostingModal] = useState(false);
@@ -843,6 +844,7 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
   const [detailRequirement, setDetailRequirement] = useState("");
   const [selectedDetailModules, setSelectedDetailModules] = useState<string[]>(defaultDetailModuleIds);
   const [detailStatus, setDetailStatus] = useState<DetailStatus>("idle");
+  const [detailResultUrl, setDetailResultUrl] = useState<string | null>(null);
   const productSetRatioOptions = getPlatformRatioOptions(productSetPlatform, productSetOutput);
   const hotUploadedRatioOption = cloneOutput === "hot" ? formatUploadedImageRatio(cloneReferenceImages[0]) : null;
   const baseCloneRatioOptions = getPlatformRatioOptions(platform, cloneOutput);
@@ -1705,7 +1707,7 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
       "set", setImages, productSetRequirement,
       productSetPlatform, productSetRatio, productSetLanguage, productSetMarket,
       (s) => setProductSetStatus(s as ProductSetStatus),
-      (res) => { setProductSetStatus("done"); },
+      (res) => setProductSetResultImages(res.map((r) => r.src).filter(Boolean)),
     );
   };
 
@@ -1726,7 +1728,7 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
       "detail", detailProductImages, detailRequirement,
       detailPlatform, getPlatformDefaultRatio(detailPlatform), detailLanguage, detailMarket,
       (s) => setDetailStatus(s as DetailStatus),
-      (res) => { setDetailStatus("done"); },
+      (res) => setDetailResultUrl(res[0]?.src ?? null),
     );
   };
 
@@ -1795,6 +1797,10 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
     detailProductImages.length === 0 ? "请上传产品图" : detailStatus === "generating" ? "生成中..." : "生成A+详情页";
   const clonePrimaryLabel =
     productImages.length === 0 ? "请先上传商品原图" : status === "generating" ? "生成中..." : `生成${selectedCloneOutput.label}`;
+  const setPreviewCards = productSetPreviewCards.map((card, index) => ({
+    ...card,
+    src: productSetResultImages[index] ?? card.src,
+  }));
   const clonePreviewCards = productSetPreviewCards.map((card, index) => ({
     ...card,
     src: results[index]?.src ?? card.src,
@@ -2717,14 +2723,14 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
           <button
             type="button"
             className="product-set-main-card"
-            onClick={() => openProductSetPreview(productSetPreviewCards[0])}
+            onClick={() => openProductSetPreview(setPreviewCards[0])}
           >
-            <img src={productSetPreviewCards[0].src} alt="01 主图" />
+            <img src={setPreviewCards[0].src} alt="01 主图" />
-            <span>{productSetPreviewCards[0].label}</span>
+            <span>{setPreviewCards[0].label}</span>
           </button>
           <div className="product-set-flow-arrow" aria-hidden="true" />
           <div className="product-set-card-grid result-reveal">
-            {productSetPreviewCards.slice(1).map((card) => (
+            {setPreviewCards.slice(1).map((card) => (
               <button key={card.id} type="button" onClick={() => openProductSetPreview(card)}>
                 <img src={card.src} alt={card.label} />
                 <span>{card.label}</span>
@@ -2854,7 +2860,7 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
         </div>
         <div className="product-detail-flow-arrow" aria-hidden="true" />
         <div className="product-detail-long-result">
-          <img src={detailAssets.longPage} alt="生成电商长图" />
+          <img src={detailResultUrl ?? detailAssets.longPage} alt="生成电商长图" />
           <span>{detailStatus === "done" ? "已生成电商长图" : "生成电商长图"}</span>
         </div>
         <div className="product-detail-grid-result">