Merge branch worktree-neo-surveillance-redesign into main — Neo Surveillance redesign

Full frontend redesign with glassmorphic dark theme, floating top nav,
Live2D mascot, split-pane messages, and Ops Center dashboard.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com

services/frontend/src/components/shared/index.ts

@@ -1,4 +1,6 @@
+export { DetailStat } from "./detail-stat";
 export { EmptyState } from "./empty-state";
 export { ErrorBoundary } from "./error-boundary";
 export { ErrorState } from "./error-state";
 export { LoadingSkeleton } from "./loading-skeleton";
+export { StatCard } from "./stat-card";