refactor: remove unused admin user update function and update related components to use new API

src/modules/dashboard/dashboard-analytics-panel.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import Link from "next/link";
-import { useCallback, useEffect, useMemo, useState, type ReactElement } from "react";
+import { useCallback, useEffect, useMemo, useState, type ReactElement, type ReactNode } from "react";
 import { format, subDays } from "date-fns";
 import { useTranslation } from "react-i18next";
 import { BarChart3, Gift, TrendingUp, Wallet } from "lucide-react";
@@ -77,7 +77,7 @@ export function DashboardAnalyticsPanel({
 }: {
   enabled: boolean;
   playOptions: { code: string; label: string }[];
-}): ReactElement {
+}): ReactNode {
   const { t } = useTranslation(["dashboard", "common"]);
   const playLabel = useAdminPlayCodeLabel();
 
@@ -240,7 +240,7 @@ export function DashboardAnalyticsPanel({
               <Label className="text-xs text-muted-foreground">{t("analytics.playLabel")}</Label>
               <Select
                 value={playCode === "" ? "__all__" : playCode}
-                onValueChange={(v) => setPlayCode(v === "__all__" ? "" : v)}
+                onValueChange={(v) => setPlayCode(!v || v === "__all__" ? "" : v)}
               >
                 <SelectTrigger className="w-full min-w-[160px]">
                   <SelectValue>{playFilterLabel}</SelectValue>