feat: add group filter to send logs view

- Add groupId query param to GET /api/logs endpoint
- Add group filter dropdown in SendLogs component
- Pass groups list and filter state from admin.vue
- Update useLogs.ts to accept optional groupId parameter
- Add groupId to SendRecord type
- Add i18n keys and CSS for filter UI

admin/composables/useI18n.ts

@@ -151,6 +151,8 @@ const en: Dict = {
   "logs.no": "Failed",
   "logs.error": "Error",
   "logs.detail": "Extra Info",
+  "logs.filterGroup": "Group",
+  "logs.allGroups": "All groups",
   "toast.routesSaved": "Routes saved",
   "toast.routeDeleted": "Route deleted",
   "toast.groupSaved": "Groups saved",
@@ -311,6 +313,8 @@ const zh: Dict = {
   "logs.no": "失败",
   "logs.error": "错误信息",
   "logs.detail": "附加信息",
+  "logs.filterGroup": "分组",
+  "logs.allGroups": "全部分组",
   "toast.routesSaved": "路由已保存",
   "toast.routeDeleted": "路由已删除",
   "toast.groupSaved": "分组已保存",