feat: 实例分组增强阶段1（后端 JSON 存储与命令）

packages/app-lib/src/state/instances/commands/get_instance.rs

@@ -3,6 +3,7 @@ use crate::state::instances::{
     LoaderComponent,
     adapters::sqlite::{instance_rows, loader_component_rows},
 };
+use crate::state::instance_groups;
 use serde::{Deserialize, Serialize};
 use sqlx::SqlitePool;
 
@@ -91,11 +92,12 @@ impl InstanceMetadata {
         record: instance_rows::InstanceMetadataRecord,
         loader_components: Vec<LoaderComponent>,
     ) -> Self {
+        let groups = instance_groups::group_ids_for(&record.instance.id);
         Self {
             instance: record.instance,
             applied_content_set: record.applied_content_set,
             link: record.link,
-            groups: record.groups,
+            groups,
             launch_overrides: record.launch_overrides,
             loader_components,
             synced_options: Default::default(),