“单设备登录（同端互斥）”功能和后台全局用户配置

video-gen-api/app/api/v1/admin.py

@@ -399,6 +399,45 @@ async def update_user_admin_status(
     return {"message": "ok"}
 
 
+@router.put("/users/{user_id}/single-device-login-override")
+async def update_single_device_login_override(
+    user_id: str,
+    body: dict,
+    admin: User = Depends(get_admin_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """设置用户级单设备登录覆盖。
+
+    body.override: True=强制启用, False=强制禁用, None=跟随全局
+    """
+    override = body.get("override")
+    if override is not None:
+        override = bool(override)
+    # None 表示跟随全局
+    await db.execute(
+        update(User).where(User.id == user_id).values(single_device_login_override=override)
+    )
+    await db.flush()
+    label = "跟随全局" if override is None else ("强制启用" if override else "强制禁用")
+    await log_operation(
+        db,
+        admin.id,
+        admin.username,
+        f"单设备登录设置: {label}",
+        "PUT",
+        f"/admin/users/{user_id}/single-device-login-override",
+        detail=json.dumps(
+            {
+                "user_id": user_id,
+                "override": override,
+            },
+            ensure_ascii=False,
+        ),
+    )
+    await db.commit()
+    return {"message": "ok"}
+
+
 @router.put("/users/{user_id}/frontend-kind", response_model=AdminUserOut)
 async def update_user_frontend_kind(
     user_id: str,