[codex] Add Freebuff live usage dashboard

freebuff/web/src/app/api/live/route.ts

@@ -0,0 +1,15 @@
+import { NextResponse } from 'next/server'
+
+import { getFreebuffLiveStats } from '@/server/live-stats'
+
+export const dynamic = 'force-dynamic'
+export const revalidate = 0
+
+export async function GET() {
+  const stats = await getFreebuffLiveStats()
+  return NextResponse.json(stats, {
+    headers: {
+      'Cache-Control': 'no-store, max-age=0',
+    },
+  })
+}