fix(admin): 将系统管理菜单排到侧栏最后

系统管理应位于业务菜单之后，调整种子排序并在启动时同步已有库数据。

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

server/tests/test_rbac.py

@@ -704,6 +704,16 @@ def test_seed_superuser_is_idempotent(client: TestClient):
         assert directory is not None
         assert directory.path == "/system"
         assert directory.icon == "ri:settings-3-line"
+        assert directory.sort == 99
+        other_top = db.scalars(
+            select(AdminResource).where(
+                AdminResource.parent_id.is_(None),
+                AdminResource.name != "System",
+                AdminResource.status == "active",
+            )
+        ).all()
+        assert other_top
+        assert directory.sort > max(item.sort for item in other_top)
         page = db.scalar(select(AdminResource).where(AdminResource.parent_id == directory.id, AdminResource.name == "User"))
         assert page is not None
         assert page.component == "/system/user"