Harden CMS security and theme contrast

src/actions/admin-applications.ts

@@ -3,18 +3,12 @@
 import { revalidatePath } from "next/cache";
 import { requireStaff } from "@/lib/admin/guard";
 import { prisma } from "@/lib/prisma";
+import { formPositiveBigInt } from "@/lib/form-data";
 
 export async function dismissApplication(formData: FormData): Promise<void> {
   await requireStaff();
-  const raw = String(formData.get("id") ?? "").trim();
-  if (!raw) return;
-
-  let id: bigint;
-  try {
-    id = BigInt(raw);
-  } catch {
-    return;
-  }
+  const id = formPositiveBigInt(formData, "id");
+  if (!id) return;
 
   try {
     await prisma.websiteStaffApplications.delete({ where: { id } });