移植 Axolotl 的拖拽式实例分组界面到 Starlight,接入阶段1的规范化分组后端: - 新增 helpers/analytics.ts(trackEvent 遥测桩) - 补全 helpers/instance-groups.ts(6 个 invoke 包装) - 新增 composables/useInstanceGroups.ts(分组状态 + 事件监听) - 升级 composables/useGridGrouping.ts(排序方向 isSortAscending/toggleSortDirection) - helpers/events.js 补 instance_groups_listener(对接 instance_groups_changed 事件) - 新增 components/ui/library/DraggableInstanceCard.vue - 新增 components/ui/library/InstanceGroup.vue(并补 group-drag-handle 修复组拖拽重排) - 新增 components/ui/modal/InstanceGroupModal.vue - GridDisplay.vue 替换为 Axolotl 拖拽版(DragDropProvider + vuedraggable) - 补 en-US/zh-CN i18n 键各 39 条