Refactor code

src/actions/users/deleteUser.ts

@@ -4,13 +4,15 @@ import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
 import { headers } from "next/headers";
 import { z } from "zod/v4";
+import type { SessionWithRole } from "@/types/auth";
 
+// Deletes a user account with safety checks (admin-only, cannot delete self or last admin).
 export async function deleteUser(id: string) {
   const userId = z.string().min(1).parse(id);
 
   const session = await auth.api.getSession({ headers: await headers() });
-  const role = (session as any)?.user?.role as string | undefined;
-  const currentUserId = (session as any)?.user?.id as string | undefined;
+  const role = (session as SessionWithRole)?.user?.role;
+  const currentUserId = (session as SessionWithRole)?.user?.id;
 
   if (!session || role !== "admin") throw new Error("Forbidden");
   if (!currentUserId) throw new Error("Session missing user id");
@@ -40,5 +42,5 @@ async function await_attachTarget(userId: string) {
     select: { id: true, role: true },
   });
   if (!target) throw new Error("User not found.");
-  return target as { id: string; role: "admin" | "user" };
+  return target;
 }