feat: Add role-based email limit exemption for emperors

app/hooks/use-user-role.ts

@@ -0,0 +1,21 @@
+"use client"
+
+import { useSession } from "next-auth/react"
+import { Role } from "@/lib/permissions"
+import { useEffect, useState } from "react"
+
+export function useUserRole() {
+  const { data: session } = useSession()
+  const [role, setRole] = useState<Role | null>(null)
+
+  useEffect(() => {
+    if (session?.user?.roles?.[0]?.name) {
+      setRole(session.user.roles[0].name as Role)
+    }
+  }, [session])
+
+  return {
+    role,
+    loading: !session
+  }
+}