fix(tkfb): 모바일 사이드바 z-index 전역 수정

sideNav.mobile-open z-index:999, mobileOverlay z-index:998.
모든 페이지 콘텐츠(z-1000 이하)보다 사이드바가 항상 위에 표시.
tkfb.css 캐시 버스팅 전체 갱신.

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

system1-factory/web/pages/work/meeting-detail.html

@@ -6,7 +6,7 @@
     <title>회의록 상세 - TK 공장관리</title>
     <script src="https://cdn.tailwindcss.com"></script>
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
-    <link rel="stylesheet" href="/static/css/tkfb.css?v=2026031701">
+    <link rel="stylesheet" href="/static/css/tkfb.css?v=2026033108">
     <style>
         .attendee-tag { display: inline-flex; align-items: center; gap: 4px; background: #eff6ff; color: #2563eb; padding: 2px 8px; border-radius: 9999px; font-size: 0.75rem; }
         .attendee-tag .remove-btn { cursor: pointer; color: #93c5fd; }