feat(web): unify Semi UI workspace states

vehicle-data-platform/apps/web/src/v2/pages/StatisticsPage.tsx

@@ -7,7 +7,7 @@ import { api } from '../../api/client';
 import type { DailyMileageRow, MileageStatistics, Page, VehicleRow } from '../../api/types';
 import { createMileageExportStream, type MileageExportStream } from '../domain/mileageExport';
 import { formatZhNumber } from '../domain/formatters';
-import { InlineError } from '../shared/AsyncState';
+import { InlineError, PanelEmpty, PanelLoading } from '../shared/AsyncState';
 import { MonitorReturnBar } from '../shared/MonitorReturnBar';
 import { MobileFilterToggle } from '../shared/MobileFilterToggle';
 import { TablePagination } from '../shared/TablePagination';
@@ -512,8 +512,8 @@ export default function StatisticsPage() {
         <span><strong>{exportProgress.label}</strong><small>{exportPercent == null ? '处理中' : `${exportPercent}%`}</small></span>
         <i className={exportPercent == null ? 'is-indeterminate' : ''}><b style={exportPercent == null ? undefined : { width: `${exportPercent}%` }} /></i>
       </div> : null}
-      {resultsLoading ? <div className="v2-mileage-loading" role="status" aria-live="polite"><Spin size="middle" tip="正在查询里程" /><small>新筛选范围返回前不会展示上一范围的数据</small></div> : displayVehicles.length ? <MileageTable rows={matrixRows} dates={dates} scrollRef={tableScrollRef} /> : null}
-      {!resultsLoading && !displayVehicles.length ? <Empty className="v2-mileage-empty" title="当前没有可展示的车辆" description="选择车牌或调整车辆授权范围后重试。" /> : null}
+      {resultsLoading ? <PanelLoading className="v2-mileage-loading" title="正在查询里程" description="新筛选范围返回前不会展示上一范围的数据。" /> : displayVehicles.length ? <MileageTable rows={matrixRows} dates={dates} scrollRef={tableScrollRef} /> : null}
+      {!resultsLoading && !displayVehicles.length ? <PanelEmpty className="v2-mileage-empty" title="当前没有可展示的车辆" description="选择车牌或调整车辆授权范围后重试。" /> : null}
       <footer>{!hasVehicles && totalVehicles ? <TablePagination page={page} totalPages={totalPages} info={`共 ${totalVehicles.toLocaleString('zh-CN')} 辆 · 每页 ${PAGE_SIZE} 辆${exportFeedback ? ` · ${exportFeedback}` : ''}`} disabled={fleetVehicles.isFetching} onPageChange={setPage} /> : <span className="v2-table-pagination-info">已选择 {totalVehicles.toLocaleString('zh-CN')} 辆车辆{exportFeedback ? ` · ${exportFeedback}` : ''}</span>}</footer>
     </Card>
     <footer className="v2-mileage-evidence"><span>数据更新时间：{statistics.data?.asOf || '—'}</span><span>来源优先级：{criteria.sources.filter((source) => source.enabled).map((source) => source.protocol).join(' ＞ ')}</span><span>当前筛选复用 1 分钟 · 离开后释放明细</span></footer>