feat: 实例分组增强阶段1（后端 JSON 存储与命令）

packages/app-lib/src/api/instance/mod.rs

@@ -5,6 +5,7 @@ mod content;
 mod core_components;
 mod export_mrpack;
 mod get;
+mod groups;
 mod home;
 mod install;
 mod lifecycle;
@@ -72,6 +73,11 @@ pub use self::export_mrpack::{
     create_mrpack_json, export_mrpack, get_pack_export_candidates,
 };
 pub use self::get::{get, get_many, list};
+pub use self::groups::{
+    FAVORITES_GROUP_ID, InstanceGroup, InstanceGroupMembershipUpdate,
+    create_group, delete_group, list_groups, rename_group,
+    set_group_memberships, set_group_order,
+};
 pub use self::home::{
     get_daily_playtime, get_daily_playtime_details, set_pinned,
 };