feat(assets): add dimension analysis and authorized user previews

Refactor asset drilldowns with combined dimension filters, parent summaries and progressive loading. Add the hidden /who read-only permission preview with scoped authorization, identity mapping and audit logging. Refine inventory counts and AI问数 presentation.

src/modules/assets/components/analysis/ProgressiveRowsStatus.tsx

@@ -0,0 +1,18 @@
+import type { RefCallback } from 'react';
+import './progressive-rows.css';
+
+interface Props {
+  visibleCount: number;
+  total: number;
+  hasMore: boolean;
+  loadMore: () => void;
+  sentinelRef: RefCallback<HTMLDivElement>;
+  unit?: string;
+}
+
+export function ProgressiveRowsStatus({ visibleCount, total, hasMore, loadMore, sentinelRef, unit = '条' }: Props) {
+  return <div ref={sentinelRef} className="analysis-progressive-status">
+    <span role="status" aria-live="polite">已加载 {visibleCount.toLocaleString('zh-CN')} / {total.toLocaleString('zh-CN')} {unit}</span>
+    {hasMore ? <><span className="analysis-progressive-hint">下滚继续加载</span><button type="button" onClick={loadMore}>加载更多</button></> : <span className="analysis-progressive-hint">已显示全部</span>}
+  </div>;
+}