fix: 完善商品—模特库-视频项目-自由创作等删除先进垃圾桶及可恢复等流程

core/backend/apps/projects/models.py

@@ -23,6 +23,8 @@ class Project(TeamOwnedModel):
     budget_limit = models.DecimalField(max_digits=12, decimal_places=2, null=True, blank=True)
     failure_reason = models.TextField(blank=True)
     metadata = models.JSONField(default=dict, blank=True)
+    is_deleted = models.BooleanField(default=False)
+    purged_at = models.DateTimeField(null=True, blank=True)
 
     class Meta:
         indexes = [
@@ -30,6 +32,7 @@ class Project(TeamOwnedModel):
             models.Index(fields=["team", "current_stage"]),
             # 项目列表默认按团队 + 更新时间倒序
             models.Index(fields=["team", "-updated_at"]),
+            models.Index(fields=["team", "is_deleted", "purged_at"]),
         ]
 
     def __str__(self) -> str: