Revert "feat(cupang): 드래그 조작감 개선 — 핸들·플레이스홀더·오토스크롤"

This reverts commit 47e09b94d7.

app/static/cupang.css

@@ -596,7 +596,7 @@
 }
 
 /* ② 요약: 카드가 드래그 가능함을 알린다 */
-.cpg-sum-prod.is-draggable, .cpg-box-card.is-draggable { cursor: pointer; }
+.cpg-sum-prod.is-draggable, .cpg-box-card.is-draggable { cursor: grab; }
 .cpg-sum-prod.is-draggable:hover, .cpg-box-card.is-draggable:hover {
   border-color: var(--color-rich-black);
 }
@@ -695,51 +695,3 @@ body.cpg-dragging { cursor: grabbing; user-select: none; }
 /* 드래그 중일 때 ③ 영역을 강조 — 어디에 놓아야 하는지 보이게 */
 .cpg-dist-card.is-drop-ready { outline: 2px dashed var(--color-rich-black); outline-offset: 2px; }
 .cpg-dist-card.is-drop-ready .cpg-dist-center { border-color: var(--color-midtone-gray); }
-
-/* 드래그 핸들 / 플레이스홀더 / 고스트 배지 */
-.cpg-drag-handle {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  width: 20px;
-  height: 20px;
-  margin-right: 4px;
-  border-radius: 5px;
-  color: var(--color-midtone-gray);
-  cursor: grab;
-  touch-action: none;              /* 모바일에서 스크롤 제스처와 충돌 방지 */
-  user-select: none;
-  flex: 0 0 auto;
-}
-.cpg-drag-handle:hover { background: var(--color-ghost-gray); color: var(--color-rich-black); }
-body.cpg-dragging .cpg-drag-handle { cursor: grabbing; }
-
-.cpg-drop-placeholder {
-  margin-top: 6px;
-  padding: 8px;
-  border: 1.5px dashed var(--color-rich-black);
-  border-radius: 8px;
-  font-size: 12px;
-  color: var(--color-rich-black);
-  background: var(--color-ghost-gray);
-  animation: cpg-ph-in .15s ease-out;
-}
-@keyframes cpg-ph-in {
-  from { opacity: 0; transform: translateY(-4px); }
-  to   { opacity: 1; transform: none; }
-}
-
-.cpg-drag-badge {
-  position: absolute;
-  top: -10px;
-  right: -10px;
-  padding: 2px 8px;
-  border-radius: 999px;
-  background: var(--color-rich-black);
-  color: var(--color-canvas-white);
-  font-size: 11px;
-  font-weight: 700;
-  white-space: nowrap;
-}
-.cpg-drag-ghost.is-invalid { border-color: var(--color-callout-red); }
-.cpg-drag-ghost.is-invalid .cpg-drag-badge { background: var(--color-callout-red); }