feat(pipeline): 基础资产页 A三视图手动 + B进故事板拦截 + C采用/未采用 + D删除

- A 三视图改手动:删"打开角色详情自动出三视图"逻辑、角色生成只出立绘(不再链式自动三视图);
  详情弹窗保留「AI 生成三视图」按钮作手动入口(提示文案去掉"自动")
- B 进下一步拦截:「确认资产,进入故事板」按钮挂 guardGen —— 被引用角色/场景缺"已采用"参考图就弹窗拦
- C 采用/未采用:角色/场景卡加 toggle 徽章(已采用绿/未采用灰);默认按"实体名是否在脚本里"派生,
  用户可点击覆盖并持久化(metadata.adopt);后端 set-base-asset-adopt 端点;下游 _storyboard_reference_images
  只取已采用组(商品组永远保留、顺带排除未采用/三视图组的兜底误抓)
- D 删除:角色/场景卡 hover 显删除按钮(二次确认),商品主卡不给删;后端 delete-base-asset(连带三视图组)
- 顺手:提取闸门按钮去掉"不自动花钱"文案

验收:projects/assets/ai 全套(基线既有 7 失败零新增,新增 set-adopt/delete 3 测过);tsc+build 绿;
无头核对(采用 toggle/hover 删除/待审核盾齐活、0 console error)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/backend/apps/projects/views.py

@@ -362,6 +362,38 @@ class ProjectViewSet(TeamScopedViewSetMixin, ModelViewSet):
         promote_base_asset_stage_if_ready(project)
         return Response(BaseAssetGroupSerializer(group).data)
 
+    @action(detail=True, methods=["post"], url_path="set-base-asset-adopt")
+    @transaction.atomic
+    def set_base_asset_adopt(self, request, pk=None):
+        """显性「采用 / 未采用」某角色/场景组(metadata.adopt)。下游只取已采用的;脚本里没有的默认未采用,
+        但用户强制采用随他。默认态(不写 adopt)由前端按是否在脚本里推导,这里只存用户的覆盖。"""
+        project = self.get_object()
+        group = BaseAssetGroup.objects.select_for_update().filter(project=project, id=request.data.get("group_id")).first()
+        if group is None:
+            return Response({"detail": "group not found"}, status=status.HTTP_404_NOT_FOUND)
+        state = request.data.get("state")
+        if state not in ("adopted", "unadopted"):
+            return Response({"detail": "state must be adopted/unadopted"}, status=status.HTTP_400_BAD_REQUEST)
+        meta = dict(group.metadata or {})
+        meta["adopt"] = state
+        group.metadata = meta
+        group.save(update_fields=["metadata", "updated_at"])
+        return Response(BaseAssetGroupSerializer(group).data)
+
+    @action(detail=True, methods=["post"], url_path="delete-base-asset")
+    @transaction.atomic
+    def delete_base_asset(self, request, pk=None):
+        """删除某角色/场景资产组(连同它的三视图配套组一并删)。资产本身留在资产表,只移除项目内的组引用。"""
+        project = self.get_object()
+        group = BaseAssetGroup.objects.filter(project=project, id=request.data.get("group_id")).first()
+        if group is None:
+            return Response({"detail": "group not found"}, status=status.HTTP_404_NOT_FOUND)
+        # 连带删该角色立绘配套的三视图组(triview_of 指向本组采用的立绘)
+        if group.adopted_asset_id:
+            project.base_asset_groups.filter(metadata__triview_of=str(group.adopted_asset_id)).delete()
+        group.delete()
+        return Response({"deleted": True})
+
     @action(detail=True, methods=["post"], url_path="attach-base-asset")
     @transaction.atomic
     def attach_base_asset(self, request, pk=None):