fix(frontend): 按审计报告修复全部17项问题,数据层迁至 src/api/

P0(4): 假数据清除(avg_latency_ms:2400→null,无端点字段改null)、假进度条改诚实的不确定态、
  公共页不再反向依赖 admin(api/public.ts)、PredictProgress 重写
P1(6): 23处 any 归零(对齐后端 Pydantic 契约新增 PredictionMatchRef/HealthProbe 等)、
  a11y(aria-live 0→4,htmlFor 1→17,aria-describedby/invalid 补齐)、App.tsx 抽 SiteLayout、
  路由级 lazy+代码分割(首屏 315KB→238KB)、index.html 补 SEO/favicon/OG、死代码清理(AdminIcon 抽出)
P2(7): Login/index.css 裸色值令牌化、groupByDate useMemo、滚动监听统一、原生控件基元化、
  useLeagues 静默失败补告警、路由级 ErrorBoundary

另修复审计未列问题:
- Monitoring todos 过滤器 t!==false 放行 null 导致整页崩溃 → Boolean(t) 真值过滤
- Collection 渲染期 Date.now()(react-hooks/purity 捕获)→ 计时器 effect
- bg-press-wash/60 透明度修饰符静默失效 → RGB 三元组 + 构建期令牌守卫(下个提交接入)

工程化:数据层 dal/api/types(1047行)git mv 至 src/api/,admin 留 @deprecated 兼容壳,
  21 个引用方直指新路径;tsconfig 开启 noUnusedLocals/noUnusedParameters(清理9处存量)

frontend/src/admin/pages/DataPipeline.tsx

@@ -13,9 +13,10 @@ import {
   runDataQualityCheck,
   fetchIngestFailures,
   retryIngestFailure,
-} from '../dal'
-import type { IngestFailureItem, DataQualityCheckItem } from '../dal'
+} from '../../api/dal'
+import type { IngestFailureItem, DataQualityCheckItem } from '../../api/dal'
 import { Card, CardBody, CardHeader, Badge, SectionHeader, Alert, Spinner } from '../components'
+import { Button } from '../../components/ui'
 
 export default function DataPipelinePage() {
   const [quality, setQuality] = useState<{ failures: IngestFailureItem[]; checks: DataQualityCheckItem[] } | null>(null)
@@ -80,9 +81,9 @@ export default function DataPipelinePage() {
         title="数据管线"
         description="采集失败重试、数据质量检查与监控"
         action={
-          <button onClick={handleRunCheck} disabled={running} className="btn btn-sm">
+          <Button size="sm" onClick={handleRunCheck} disabled={running}>
             {running ? <><Spinner /> 检查中</> : '运行质量检查'}
-          </button>
+          </Button>
         }
       />
 
@@ -134,9 +135,9 @@ export default function DataPipelinePage() {
                           </td>
                           <td className="px-4 py-2">
                             {(f.status === 'pending' || f.status === 'retrying') && (
-                              <button onClick={() => handleRetry(f.id)} className="btn btn-sm">
+                              <Button size="sm" onClick={() => handleRetry(f.id)}>
                                 重试
-                              </button>
+                              </Button>
                             )}
                           </td>
                         </tr>