feat: add platform access sync action

src/lib/platforms.ts

@@ -269,6 +269,18 @@ export async function assignInstructorPlatform(
   return response.json() as Promise<InstructorPlatformsResponse>;
 }
 
+export async function syncInstructorPlatformAccess(accessToken: string): Promise<{ ok: boolean; assignmentCount: number; syncedAt: string }> {
+  const response = await fetch(`${LMS_API_BASE_URL}/instructor/platforms/access-sync`, {
+    method: 'POST',
+    headers: { Authorization: `Bearer ${accessToken}` },
+  });
+
+  if (!response.ok) {
+    throw new Error(await platformErrorMessage(response, '플랫폼 접근 설정을 동기화하지 못했습니다.'));
+  }
+  return response.json() as Promise<{ ok: boolean; assignmentCount: number; syncedAt: string }>;
+}
+
 async function platformErrorMessage(response: Response, fallback: string) {
   const payload = await response.json().catch((): null => null);
   return platformErrorMessageFromPayload(response, payload, fallback);