feat(tksupport): 휴가 보정 관리 페이지 추가 — 캘린더 기반 추가/삭제

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tksupport/web/static/js/tksupport-core.js

@@ -108,6 +108,7 @@ function renderNavbar() {
         { href: '/vacation-approval.html', icon: 'fa-clipboard-check', label: '휴가 승인', match: ['vacation-approval.html'], admin: true },
         { href: '/company-holidays.html', icon: 'fa-calendar-day', label: '전사 휴가 관리', match: ['company-holidays.html'], roles: ['support_team','admin','system'] },
         { href: '/vacation-dashboard.html', icon: 'fa-chart-bar', label: '전체 휴가관리', match: ['vacation-dashboard.html'], roles: ['support_team','admin','system'] },
+        { href: '/vacation-admin.html', icon: 'fa-user-edit', label: '휴가 보정', match: ['vacation-admin.html'], admin: true },
     ];
     const nav = document.getElementById('sideNav');
     if (!nav) return;