chore: SCADA 데모 CCTV 의 TARGET 라벨 박스 제거

실제 영상에서 BW-A1 위에 박스 정렬 어렵고 시연 임팩트 없음 — 그냥 영상 그대로 노출.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/public/scada-demo/index.html

@@ -310,9 +310,6 @@
           <div class="cctv-placeholder">
             <video class="cctv-video cctv-video-going" src="video/cctv.mp4" muted playsinline preload="auto"></video>
             <video class="cctv-video cctv-video-arrived" src="video/cctv-arrived.mp4" muted playsinline preload="auto"></video>
-            <div class="cctv-target-box">
-              <span class="cctv-target-label">TARGET: BW-A1</span>
-            </div>
             <div class="cctv-alert-icon" title="과압 알람">
               <svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"><path d="M12 9v4M12 17h.01M10.29 3.86 1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z"/></svg>
               <span>P-IN-HH</span>