feat: 只看审核按俱乐部隔离，商品管理支持俱乐部视图

未绑店出货开关按 club_id 配置；后台商品列表可在具体小程序下管理并切换审核展示。

Co-authored-by: Cursor <cursoragent@cursor.com>

shop/migrations/0004_shenhe_shezhi_club_id.py

@@ -0,0 +1,44 @@
+from django.db import migrations, models
+
+
+def forwards_fill_club_id(apps, schema_editor):
+    Model = apps.get_model('shop', 'DianpuShangpinShenheShezhi')
+    # 历史全局单例 → 归到星阙 xq；若已有多行则只保留一条
+    rows = list(Model.objects.all().order_by('id'))
+    if not rows:
+        return
+    keep = rows[0]
+    keep.club_id = keep.club_id or 'xq'
+    keep.save(update_fields=['club_id'])
+    for extra in rows[1:]:
+        extra.delete()
+
+
+def noop_reverse(apps, schema_editor):
+    pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shop', '0003_zhi_kan_shenhe'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='dianpushangpinshenheshezhi',
+            name='club_id',
+            field=models.CharField(
+                db_index=True, default='xq', max_length=16, verbose_name='所属俱乐部',
+            ),
+        ),
+        migrations.RunPython(forwards_fill_club_id, noop_reverse),
+        migrations.AlterField(
+            model_name='dianpushangpinshenheshezhi',
+            name='club_id',
+            field=models.CharField(
+                db_index=True, default='xq', max_length=16, unique=True,
+                verbose_name='所属俱乐部',
+            ),
+        ),
+    ]