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);

src/pages/platforms/PlatformsPage.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useMemo, useState, type ReactNode } from 'react';
 import { createPortal } from 'react-dom';
-import { Activity, Battery, Car, CircleAlert, KeyRound, Loader2, Plus, Search, Settings, ShieldAlert, Timer, Trash2, Users, X, type LucideIcon } from 'lucide-react';
+import { Activity, Battery, Car, CircleAlert, KeyRound, Loader2, Plus, RefreshCw, Search, Settings, ShieldAlert, Timer, Trash2, Users, X, type LucideIcon } from 'lucide-react';
 import { ConfirmDialog } from '../../components/ConfirmDialog';
 import { PageHeader } from '../../components/PageHeader';
 import { PaginationBar } from '../../components/PaginationBar';
@@ -12,6 +12,7 @@ import {
   listInstructorPlatformAgents,
   listInstructorPlatforms,
   issueInstructorPlatformRegistration,
+  syncInstructorPlatformAccess,
   PlatformInUseError,
   updateInstructorPlatform,
   type InstructorPlatform,
@@ -95,6 +96,7 @@ export function PlatformsPage({ session }: { session: AuthSession }) {
   const [assignmentGroupsError, setAssignmentGroupsError] = useState<string | null>(null);
   const [selectedAssignmentGroupId, setSelectedAssignmentGroupId] = useState('');
   const [assigningPlatformId, setAssigningPlatformId] = useState<string | null>(null);
+  const [syncingAccess, setSyncingAccess] = useState(false);
   const [forceAssignmentTarget, setForceAssignmentTarget] = useState<{ platform: InstructorPlatform; group: InstructorGroup | null; session: PlatformInUseError['activeSession'] } | null>(null);
 
   const filteredPlatforms = useMemo(() => {
@@ -262,6 +264,22 @@ export function PlatformsPage({ session }: { session: AuthSession }) {
     }
   };
 
+  const handleSyncPlatformAccess = async () => {
+    setSyncingAccess(true);
+    setError(null);
+    try {
+      const result = await syncInstructorPlatformAccess(session.accessToken);
+      showToast({
+        title: '플랫폼 접근 설정을 동기화했습니다.',
+        message: `현재 배정 기준 ${result.assignmentCount}개 플랫폼을 반영했습니다.`,
+      });
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : '플랫폼 접근 설정을 동기화하지 못했습니다.');
+    } finally {
+      setSyncingAccess(false);
+    }
+  };
+
   const handleDeletePlatform = async (platform: InstructorPlatform, force = false) => {
     setDeletingPlatformId(platform.id);
     setError(null);
@@ -378,6 +396,15 @@ export function PlatformsPage({ session }: { session: AuthSession }) {
         route="platforms"
         action={
           <div className="flex items-center gap-2">
+            <button
+              className="inline-flex h-9 items-center gap-2 rounded-md border border-[#d1d9e6] bg-white px-3 text-[13px] font-bold text-[#475569] hover:bg-[#f8fafc] disabled:cursor-not-allowed disabled:opacity-60"
+              type="button"
+              onClick={handleSyncPlatformAccess}
+              disabled={syncingAccess}
+            >
+              {syncingAccess ? <Loader2 className="animate-spin" size={15} aria-hidden="true" /> : <RefreshCw size={15} aria-hidden="true" />}
+              접근 동기화
+            </button>
             <button
               className="inline-flex h-9 items-center gap-2 rounded-md border border-[#2563eb] bg-white px-3 text-[13px] font-bold text-[#2563eb] hover:bg-[#eff6ff]"
               type="button"