feat(library): 资产库重做为「成品库」— 图片成品三类 + 视频成品按项目素材包

定义:资产 = 平台产出的成品。原料(商品/模特)归各自的库、半成品(角色/三视图/场景/分镜)归项目,
资产库只装成品 —— tab 从 9 个收成 5 个。

- 后端 /api/assets/video-packs/:视频成品按项目素材包(与「导出全部」同源,取 VideoSegment.adopted_version
  真实视频资产,给 TOS 直链 url 供 <video> 播放/取首帧);summary 改只数成品(tryon/kits/creations/others)
- 资产库 _tab_q 加 others(我的上传+未归类兜底);角色/场景/商品图/素材 tab 移除(各回各家)
- 前端 library:tab→模特上身图/平台套图/自由创作/视频成品/其他;视频成品=项目包卡(<video>首帧封面)
  → 点开弹窗看该项目所有片段(可播);图片成品/其他复用原网格
- 单测 VideoPacksTests:按项目分组 + 软删片段排除

验收:后端单测绿(基线 4 失败零新增);tsc+build 绿;无头 0 报错(5 tab + 视频包弹窗 3 段)
注:图片成品「按生成批次成组」待图片趴有真实数据时接线(当前 demo 已清空)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/backend/apps/assets/views.py

@@ -54,6 +54,8 @@ def _tab_q(tab: str) -> Q:
         return Q(category="upload")
     if tab == "materials":  # 素材(期3):视频素材 = 所有视频,排除「最终成片」(final_video 隐藏不列)
         return ~Q(category="final_video") & Q(asset_type="video")
+    if tab == "others":  # 其他(资产库成品化):我的上传 + 未归类非视频(兜底)
+        return Q(category="upload") | (~Q(category__in=_KNOWN_CATS) & ~Q(asset_type="video"))
     if tab == "unclassified":  # 未归类且非视频(也不含最终成片)
         return ~Q(category__in=_KNOWN_CATS) & ~Q(asset_type="video")
     return Q()
@@ -110,9 +112,50 @@ class AssetViewSet(TeamScopedViewSetMixin, ModelViewSet):
     def summary(self, request):
         """资产库 tab 计数(人物/场景/商品图/成片/我的上传/未分类),供 tab 徽标——不必取全量。"""
         base = Asset.objects.filter(team=self.get_team(), is_deleted=False)
-        tabs = ["people", "scenes", "products", "tryon", "kits", "creations", "materials", "uploads", "unclassified"]
+        # 资产库成品化:对外只数成品三类 + 其他(角色/场景/商品图各回各库,视频成品走 video-packs)
+        tabs = ["tryon", "kits", "creations", "others"]
         return Response({t: base.filter(_tab_q(t)).count() for t in tabs})
 
+    @action(detail=False, methods=["get"], url_path="video-packs")
+    def video_packs(self, request):
+        """视频成品按「项目素材包」打包:每个项目的已采用视频片段 = 一个包(与「导出全部」同源:
+        取 VideoSegment.adopted_version 的真实视频资产)。片段给 TOS 直链 url 供 <video> 播放/取首帧。"""
+        from apps.assets.serializers import _asset_preview
+        from apps.projects.models import Project
+
+        team = self.get_team()
+        projects = (
+            Project.objects.filter(team=team)
+            .select_related("product__cover_asset")
+            .prefetch_related("product__cover_asset__files")
+            .order_by("-updated_at")
+        )
+        out = []
+        for proj in projects:
+            segs = (
+                proj.video_segments.filter(adopted_version__isnull=False)
+                .select_related("adopted_version__asset")
+                .prefetch_related("adopted_version__asset__files")
+                .order_by("sort_order")
+            )
+            clips = []
+            for seg in segs:
+                a = getattr(seg.adopted_version, "asset", None)
+                if a is None or a.is_deleted:
+                    continue
+                clips.append({"id": str(a.id), "name": a.name, "url": _asset_preview(a)})
+            if not clips:
+                continue
+            product = proj.product
+            out.append({
+                "project_id": str(proj.id),
+                "project_name": proj.name,
+                "product_cover": _asset_preview(getattr(product, "cover_asset", None)) if product else "",
+                "clips": clips,
+            })
+        out.sort(key=lambda p: len(p["clips"]), reverse=True)
+        return Response(out)
+
     @action(detail=False, methods=["get"])
     def facets(self, request):
         """某 tab 下真实存在的筛选项(来源/类型/指定 metadata 键的取值),供下拉「只列真有的」。