Revert "Add missing admin action files and navigation links"

This reverts commit 41be6835bf.

src/app/admin/alerts/page.tsx

@@ -84,14 +84,24 @@ export default async function AdminAlerts() {
 
       <div className="grid grid-cols-[repeat(auto-fit,minmax(180px,1fr))] gap-3.5 mb-6">
         <StatusCard label={t("alertsShown")} value={alerts.length} icon="🔔" />
-        <StatusCard label={t("critical")} value={critical} state={critical > 0 ? "danger" : "ok"} icon="🚨" />
+        <StatusCard
+          label={t("critical")}
+          value={critical}
+          state={critical > 0 ? "danger" : "ok"}
+          icon="🚨"
+        />
         <StatusCard
           label={t("warnings")}
           value={warnings}
           state={warnings > 0 ? "warn" : "neutral"}
           icon="⚠️"
         />
-        <StatusCard label={t("unread")} value={unread} state={unread > 0 ? "warn" : "ok"} icon="📨" />
+        <StatusCard
+          label={t("unread")}
+          value={unread}
+          state={unread > 0 ? "warn" : "ok"}
+          icon="📨"
+        />
       </div>
 
       <form action={sendHotelAlert} className="admin-card mb-6">