fix(ai): 平台套图改走商品主图参考 image_edit · 模特上身图锁商品+模特双图

- 平台套图(cover)以前纯文生图,不参考真实商品主图 → 出图与商品对不上;
  现以商品主图为参考图1走 image_edit,锁包装一致性,有模特则参考图2=模特
- 新增 build_platform_cover_prompt_refs;model_url 解析对 cover 模式同样生效
- 补回归测试:cover 传商品主图、model 传商品主图+模特图、无主图回落文生图

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/frontend/src/routes/ai-tools.tsx

@@ -779,22 +779,6 @@ export function ImageWorkbenchPage({
 
   const hasResults = batches.length > 0;
 
-  /* 按商品分组(行34):各商品各自一个导航头,避免多商品批次被并到同一个头里。
-     保持首次出现顺序;productId 缺失的旧批次归到当前商品组。 */
-  const batchGroups = (() => {
-    const order: string[] = [];
-    const map = new Map<string, { key: string; title: string; items: GenBatch[] }>();
-    for (const b of batches) {
-      const key = b.productId || product?.id || "—";
-      if (!map.has(key)) {
-        order.push(key);
-        map.set(key, { key, title: b.productTitle || product?.title || "未选择", items: [] });
-      }
-      map.get(key)!.items.push(b);
-    }
-    return order.map((k) => map.get(k)!);
-  })();
-
   /* ── 单个批次的结果网格(行30:生成中转圈 icon;行32:单图 hover「更多」气泡菜单)── */
   function renderBatchGrid(batch: GenBatch) {
     const generating = batch.status === "generating";
@@ -854,7 +838,15 @@ export function ImageWorkbenchPage({
     );
   }
 
-  /* ── 批次列表(行31/32/33):每个批次一行卡片,底部一组操作 + 底部「更多」气泡 ── */
+  /* 批次所属商品名:优先生成时记下的 productTitle;旧批次缺失则用 productId 或成图的 asset.product
+     (后端已解析归属商品)反查 products——绝不回退到「当前选中商品」(那正是会显示错名的根因)。 */
+  function batchProductTitle(batch: GenBatch): string {
+    if (batch.productTitle) return batch.productTitle;
+    const pid = batch.productId || batch.results.find((a) => a.product)?.product || "";
+    return products.find((p) => p.id === pid)?.title || "未选择";
+  }
+
+  /* ── 批次列表(行31/32/33):每批各一个商品导航头 + 一张卡片 + 底部操作/气泡 ── */
   function renderBatchCards(list: GenBatch[]) {
     return (
       <>
@@ -862,7 +854,32 @@ export function ImageWorkbenchPage({
           const generating = batch.status === "generating";
           const failed = batch.status === "failed";
           return (
-            <div className="gen-card gen-batch-card" key={batch.id}>
+            <Fragment key={batch.id}>
+              {/* 行34:每批一个独立导航头——显示该批所属商品(多商品/多批不再合并到一个头) */}
+              <div className="iw-pv-h">
+                <Quote className="quote-icon" />
+                <div className="pv-meta">
+                  <b>1 批</b>
+                  {mode === "model" ? ` · ${batch.ratio}` : ""}
+                </div>
+                <div className="pv-line">
+                  <span className="k">商品</span>
+                  <span className="v">{batchProductTitle(batch)}</span>
+                </div>
+                {mode === "cover" && (
+                  <div className="pv-line">
+                    <span className="k">平台</span>
+                    <span className="v">
+                      {pickedIds.length
+                        ? PLATFORM_OPTIONS.filter((p) => pickedIds.includes(p.id))
+                            .map((p) => p.name)
+                            .join("、")
+                        : "未选择"}
+                    </span>
+                  </div>
+                )}
+              </div>
+            <div className="gen-card gen-batch-card">
               <div className="gen-batch-h">
                 <span className="b-pic">{batch.count}×</span>
                 <div className="b-meta">
@@ -902,6 +919,7 @@ export function ImageWorkbenchPage({
                 </div>
               </div>
             </div>
+            </Fragment>
           );
         })}
       </>
@@ -1343,35 +1361,8 @@ export function ImageWorkbenchPage({
               ) : (
                 <>
                   <MediaLightbox open={!!preview} src={preview?.src || ""} kind="image" name={preview?.name} close={() => setPreview(null)} />
-                  {/* 行34:按商品分组——每个商品一个独立导航头 + 自己的批次列表 */}
-                  {batchGroups.map((group) => (
-                    <Fragment key={group.key}>
-                      <div className="iw-pv-h">
-                        <Quote className="quote-icon" />
-                        <div className="pv-meta">
-                          <b>{group.items.length} 批</b>
-                          {mode === "model" ? ` · ${ratio}` : ""}
-                        </div>
-                        <div className="pv-line">
-                          <span className="k">商品</span>
-                          <span className="v">{group.title}</span>
-                        </div>
-                        {mode === "cover" && (
-                          <div className="pv-line">
-                            <span className="k">平台</span>
-                            <span className="v">
-                              {pickedIds.length
-                                ? PLATFORM_OPTIONS.filter((p) => pickedIds.includes(p.id))
-                                    .map((p) => p.name)
-                                    .join("、")
-                                : "未选择"}
-                            </span>
-                          </div>
-                        )}
-                      </div>
-                      {renderBatchCards(group.items)}
-                    </Fragment>
-                  ))}
+                  {/* 行34:每批各自一个导航头(含所属商品)——见 renderBatchCards */}
+                  {renderBatchCards(batches)}
                 </>
               )}
             </div>