add organization management and refine source repository view

src/pages/operations/AdminManagementPage.tsx

@@ -253,15 +253,6 @@ export function AdminManagementPage() {
           </select>
         )
       },
-      {
-        key: 'session',
-        header: '최근 세션',
-        cell: (row) => {
-          const session = row.sessions?.[0];
-          const state = session ? (session.revokedAt ? '종료' : '활성') : '세션 없음';
-          return <StatusBadge status={state} />;
-        }
-      },
       {
         key: 'sshKeys',
         header: 'SSH 키',
@@ -342,7 +333,7 @@ export function AdminManagementPage() {
         getSearchText={(row) => `${row.name} ${row.email} ${row.role} ${row.state}`}
         getRowKey={(row) => row.id}
         pageSize={6}
-        minWidth={1180}
+        minWidth={1040}
         loading={loading}
         emptyMessage="등록된 관리자가 없습니다."
       />