코드 검토 및 문서 반영

app/(admin)/maestros/[maestroId]/ExtensionRequestsSection.tsx

@@ -5,6 +5,7 @@ import { useRouter } from "next/navigation";
 import { Plus } from "lucide-react";
 
 import { Button } from "@/components/ui/button";
+import { PAID_ACCOUNT_TYPE_VALUES } from "@/lib/constants";
 import { formatDateTime, getAccountTypeLabel, getRequestStatusLabel } from "@/lib/utils";
 import type { MaestroDetail } from "@/lib/maestros";
 
@@ -26,6 +27,7 @@ export function ExtensionRequestsSection({
   const [isCreating, setIsCreating] = useState(false);
   const [errorMessage, setErrorMessage] = useState("");
 
+  const isPaidAccount = (PAID_ACCOUNT_TYPE_VALUES as readonly number[]).includes(accountType);
   const isDisabled = isCreating || isPending;
 
   async function handleCreate() {
@@ -37,11 +39,7 @@ export function ExtensionRequestsSection({
     try {
       const response = await fetch(
         `/api/maestros/${maestroID}/extension-requests`,
-        {
-          method: "POST",
-          headers: { "Content-Type": "application/json" },
-          body: JSON.stringify({ accountType }),
-        }
+        { method: "POST" }
       );
 
       const body = (await response.json().catch(() => null)) as {
@@ -75,7 +73,7 @@ export function ExtensionRequestsSection({
         </div>
         <div className="flex flex-col items-end gap-1">
           <Button
-            disabled={isDisabled}
+            disabled={isDisabled || !isPaidAccount}
             onClick={() => void handleCreate()}
             size="sm"
             type="button"