feat(frontend): skeleton loading states, empty-state glow, light-mode polish

- Add shared skeleton building blocks (SkeletonHero, SkeletonMetricRow,
  SkeletonPanel, SkeletonRows) and wire them into every view's initial
  loading branch, replacing bare spinners for a cohesive shimmering shell.
- Polish EmptyState with a glow-ring icon chip instead of a flat icon.
- Harden .light theme: color-scheme, tuned scrollbar + selection for pale
  canvas. Dark/light theme toggle (next-themes) already persisted in TopBar.

services/frontend/src/app/(dashboard)/moderation/view.tsx

@@ -24,9 +24,11 @@ import {
 } from "@/components/primitives";
 import {
   ErrorState,
-  LoadingState,
   MetricTile,
   SectionHeader,
+  SkeletonMetricRow,
+  SkeletonPanel,
+  SkeletonRows,
 } from "@/components/shared";
 import { useModerationActions, useModerationStats } from "@/hooks";
 import { formatNumber, formatRelativeTime } from "@/lib/format";
@@ -92,7 +94,14 @@ export function ModerationView({
   }, [failedRate, ambient]);
 
   if (error && !stats) return <ErrorState error={error} />;
-  if (!stats && isLoading) return <LoadingState label="Reading log" />;
+  if (!stats && isLoading)
+    return (
+      <div className="space-y-5">
+        <SkeletonMetricRow cols={4} />
+        <SkeletonPanel rows={5} />
+        <SkeletonRows rows={6} />
+      </div>
+    );
   if (!stats) return <ErrorState error={error ?? new Error("No data")} />;
 
   const statusOpts: SelectOption[] = [