fix(ai): 图片创作重跑三连修——丢参考图/裂新批次/提示词矛盾

① 重跑丢参考图:「重跑这张/重跑整批」原来不带 refs → 后端收不到
reference_image_ids 落到纯文生图,出图与上传素材无关。现 GenBatch.refs
存 assetId(上传后回写;恢复批次由 tasks 接口新带的 id 还原),重跑原样带回。

② 重跑裂新聊天记录:enqueue 每次新铸 batch_id,后端没有「补进原批次」
概念,刷新/切对话后重跑图裂成新卡、原卡失败格还挂着。现生成接口收/回
batch_id(UUID 校验,非法兜底新铸),重跑沿用原批次并打 batch_append 标记;
前端批次卡存 backendBatchId(提交回调即落,整批全失败也不丢),重跑带回。
恢复分组时 rerun 任务不计入「应出张数」→ 补图成功后失败格自然收掉;
批次状态改按「有任务在跑」判定,已有好图+补图在途也能接续轮询。

③ 同批换装一半不换:带参考图模板「严格保留款式/不要换款」与用户要求
(如"生成现代服装的穿着")直接矛盾,模型每张随机听一边。改为只锁主体身份
(人物五官/发型/体型,商品品类/外形/Logo),用户明确要求改变的以用户要求
为最高优先级,未提及的才默认与参考图一致。

测试:apps 全量 214 过(需 --settings=airshelf.settings.test);
新增 test_rerun_with_batch_id_reuses_batch_and_marks_append。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

core/backend/apps/ai/views.py

@@ -41,6 +41,8 @@ class GenerateImageView(APIView):
         # 平台套图:前端传规范化平台 id(taobao/douyin/…),用于后端注入平台版式块(优化版)
         platform_id = str(request.data.get("platform_id") or "").strip() or None
         conversation_id = str(request.data.get("conversation_id") or "").strip() or None
+        # 重跑/补图:前端带原批次 batch_id → enqueue 沿用(UUID 校验),记录归回原批次不裂新卡
+        batch_id = str(request.data.get("batch_id") or "").strip() or None
         # 用户在图片创作里上传的参考图(已先传成 Asset),按 id 列表带入 → 生成时作多图参考(image_edit)
         raw_refs = request.data.get("reference_image_ids") or []
         if isinstance(raw_refs, str):
@@ -60,13 +62,18 @@ class GenerateImageView(APIView):
                 title=(prompt[:24] or "默认创作"),
             )
         try:
-            tasks = enqueue_standalone_images(team=team, user=request.user, prompt=prompt, mode=mode, count=count, product_id=product_id, reference_product=reference_product, model_id=model_id, model_entity_id=model_entity_id, ratio=ratio, image_model=image_model, conversation=conversation, reference_image_ids=reference_image_ids, platform_id=platform_id)
+            tasks = enqueue_standalone_images(team=team, user=request.user, prompt=prompt, mode=mode, count=count, product_id=product_id, reference_product=reference_product, model_id=model_id, model_entity_id=model_entity_id, ratio=ratio, image_model=image_model, conversation=conversation, reference_image_ids=reference_image_ids, platform_id=platform_id, batch_id=batch_id)
         except ValueError as exc:  # 无可用模型 / 余额不足等,立即反馈
             return Response({"detail": str(exc)}, status=status.HTTP_400_BAD_REQUEST)
         # 本次提交即刷新对话活跃时间,左栏「最近」据此置顶
         ImageConversation.objects.filter(id=conversation.id).update(last_active_at=timezone.now())
+        # batch_id 回传给前端存进批次卡:后续「重跑这张 / 重跑整批」带它回来即可归回原批次
         return Response(
-            {"conversation_id": str(conversation.id), "tasks": [{"id": str(t.id), "status": t.status} for t in tasks]},
+            {
+                "conversation_id": str(conversation.id),
+                "batch_id": (tasks[0].request_payload or {}).get("batch_id") if tasks else None,
+                "tasks": [{"id": str(t.id), "status": t.status} for t in tasks],
+            },
             status=status.HTTP_202_ACCEPTED,
         )
 
@@ -177,6 +184,8 @@ class AITaskViewSet(TeamScopedViewSetMixin, ReadOnlyModelViewSet):
                 rp_platform_id=KeyTextTransform("platform_id", "request_payload"),
                 rp_model_id=KeyTextTransform("model_id", "request_payload"),
                 rp_model_entity_id=KeyTextTransform("model_entity_id", "request_payload"),
+                # 只在重跑任务里落此键(值恒为 True);键不存在 → NULL → 假值,存在 → "true"/"1" → 真值
+                rp_batch_append=KeyTextTransform("batch_append", "request_payload"),
             )
             .filter(request_payload__mode=mode)  # 路径查找,不能用 rp_mode 注解比较(MySQL 3141,见 _unread_base)
         )
@@ -197,6 +206,7 @@ class AITaskViewSet(TeamScopedViewSetMixin, ReadOnlyModelViewSet):
                 "model_id": t.rp_model_id or "",
                 "model_entity_id": t.rp_model_entity_id or "",
                 "platform_id": t.rp_platform_id or "",
+                "rerun": bool(t.rp_batch_append),
                 "created_at": t.created_at,
                 # 软删的图不再出现在工作台记录里(R109:删除资产库图片 → 任务记录联动)
                 "assets": AssetSerializer(
@@ -271,7 +281,8 @@ class ImageConversationViewSet(TeamScopedViewSetMixin, ModelViewSet):
                 rid = str(rid)
                 if rid not in ref_cache:
                     a = Asset.objects.filter(id=rid).prefetch_related("files").first()
-                    ref_cache[rid] = {"name": a.name, "url": _asset_preview(a)} if a else None
+                    # 带上 id:前端重跑时凭它原样复用参考图(否则刷新恢复的批次只有 {name,url},重跑丢参考)
+                    ref_cache[rid] = {"id": rid, "name": a.name, "url": _asset_preview(a)} if a else None
                 if ref_cache[rid]:
                     out.append(ref_cache[rid])
             return out
@@ -284,6 +295,8 @@ class ImageConversationViewSet(TeamScopedViewSetMixin, ModelViewSet):
                 "prompt": (t.request_payload or {}).get("prompt", ""),
                 "batch_id": (t.request_payload or {}).get("batch_id", ""),
                 "ratio": (t.request_payload or {}).get("ratio") or "",
+                # 重跑/补图任务:不计入批次「应出张数」,前端据此正确渲染失败格数量
+                "rerun": bool((t.request_payload or {}).get("batch_append")),
                 "reference_images": resolve_refs((t.request_payload or {}).get("reference_image_ids")),
                 "created_at": t.created_at,
                 "assets": AssetSerializer(