refactor: 前端架构重构 — hook拆分、组件拆分、类型筛选器动态化、Meta API

- 后端新增 GET /api/meta 端点（checkerRegistry.supportedTypes）及 MetaResponse 类型
- 前端 hook 拆分为 use-queries.ts（全局查询+useMeta）和 use-target-detail.ts（Drawer状态）
- TargetDetailDrawer 拆分为 OverviewTab + HistoryTab + history-table-columns + stats.ts
- 类型筛选器由 meta API 动态驱动，删除 target-type-display 静态映射
- 列定义改为工厂函数 createTargetTableColumns(checkerTypes)，TargetGroup 新增 columns prop
- 修复 StatusDonut key、StatusBar maxSlots prop、TrendChart 移除 loading prop
- 补充 utils/time、utils/stats、动态列工厂测试，删除旧 mapping 测试
- 同步 delta specs 到主 specs，归档 frontend-architecture-refactor change

src/web/components/TargetGroup.tsx

@@ -1,17 +1,19 @@
+import type { PrimaryTableCol } from "tdesign-react";
+
 import { PrimaryTable } from "tdesign-react";
 
 import type { TargetStatus } from "../../shared/api";
 
-import { TARGET_TABLE_COLUMNS } from "../constants/target-table-columns";
 import { GroupHeader } from "./GroupHeader";
 
 interface TargetGroupProps {
+  columns: Array<PrimaryTableCol<TargetStatus>>;
   name: string;
   onTargetClick: (target: TargetStatus) => void;
   targets: TargetStatus[];
 }
 
-export function TargetGroup({ name, onTargetClick, targets }: TargetGroupProps) {
+export function TargetGroup({ columns, name, onTargetClick, targets }: TargetGroupProps) {
   const up = targets.filter((t) => t.latestCheck?.matched).length;
   const down = targets.length - up;
 
@@ -21,7 +23,7 @@ export function TargetGroup({ name, onTargetClick, targets }: TargetGroupProps)
       <PrimaryTable
         bordered
         className="clickable-table"
-        columns={TARGET_TABLE_COLUMNS}
+        columns={columns}
         data={targets}
         defaultSort={[{ descending: true, sortBy: "latestCheck.matched" }]}
         hover