fix(cupang): 도장은 또렷하게, 애니메이션은 방금 완료된 것만

- 혼합 박스 도장이 흐리게 보이던 원인: 부모(.cpg-box-title)에 opacity 를
  주면 자식 도장까지 함께 흐려진다 → 제목은 색만 낮추고 도장은 opacity 1.
- 렌더할 때마다 모든 도장에 애니메이션이 다시 걸리던 문제: 이미 찍힌
  항목을 stamped 로 기억해 새로 완료된 도장(.is-new)에만 애니메이션.
  잔여가 다시 생기거나 재계산하면 기록을 지워 다음 완료 때 다시 찍힌다.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

app/modules/cupang/templates/cupang/box_calc.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829j" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829k" />{% endblock %}
 
 {% block content %}
 <section class="cpg">
@@ -248,7 +248,8 @@
             });
           });
           var had = Object.keys(alloc).some(function (k) { return alloc[k].length; });
-          alloc = {};   // 계산이 바뀌면 이전 배분은 근거가 사라지므로 비운다.
+          alloc = {};
+          stamped = {};   // 계산이 바뀌면 이전 배분은 근거가 사라지므로 비운다.
           render();
           msg.textContent = "계산 완료 (" + calc.results.length + "건)" + (had ? " — 센터 분배 초기화됨" : "");
         })
@@ -303,9 +304,12 @@
         "</svg>";
     }
 
-    // 배분이 끝난 카드에 찍는 도장.
-    function stampHtml() {
-      return '<span class="cpg-stamp" aria-label="배분 완료">배분 완료</span>';
+    // 배분이 끝난 카드에 찍는 도장. 애니메이션은 "이번에 막 완료된" 것만.
+    var stamped = {};   // key -> 이미 도장이 찍혀 있던 항목
+    function stampHtml(key) {
+      var fresh = !stamped[key];
+      stamped[key] = true;
+      return '<span class="cpg-stamp' + (fresh ? " is-new" : "") + '" aria-label="배분 완료">배분 완료</span>';
     }
 
     function kpi(label, value, hint) {
@@ -348,11 +352,12 @@
         var key = prodKey(r.product_code);
         var remain = remainFor(key);
         var used = r.full_boxes - remain;
+        if (remain) delete stamped[key];
         ph += '<div class="cpg-sum-prod' + (remain ? " is-draggable" : " is-done") + '"' +
                 ' data-key="' + esc(key) + '">' +
                 '<div class="cpg-sum-prod-head">' +
                   '<span class="cpg-sum-prod-name">' + esc(r.product_name) + "</span>" +
-                  (remain ? "" : stampHtml()) +
+                  (remain ? "" : stampHtml(key)) +
                 "</div>" +
                 '<div class="cpg-sum-prod-nums">' +
                   "<strong>" + remain + "박스</strong>" +
@@ -376,6 +381,7 @@
           m.boxes.forEach(function (b, i) {
             var key = mixKey(m.box_name, i);
             var remain = remainFor(key);
+            if (remain) delete stamped[key];
             var items = b.items.map(function (it) {
               return "<li><span>" + esc(it.product_name) + "</span><b>" + it.quantity + "개</b></li>";
             }).join("");
@@ -385,7 +391,7 @@
                     '<div class="cpg-box-art">' + boxSvg(b.fill_percent, m.box_name) + "</div>" +
                     '<div class="cpg-box-info">' +
                       '<div class="cpg-box-title">' + esc(m.box_name) + " 혼합 #" + (i + 1) +
-                        (remain ? "" : stampHtml()) + "</div>" +
+                        (remain ? "" : stampHtml(key)) + "</div>" +
                       '<ul class="cpg-box-items">' + items + "</ul>" +
                       '<div class="cpg-box-bar"><span style="width:' + b.fill_percent + '%"></span></div>' +
                       '<div class="cpg-box-fillnum">' + b.fill_percent + "% 채움 · " + units[key] + "개</div>" +

app/modules/cupang/templates/cupang/box_rules.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829j" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829k" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/centers.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829j" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829k" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/detail.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829j" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829k" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/form.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829j" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829k" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/index.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829j" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829k" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/products.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829j" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260829k" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/static/cupang.css

@@ -748,8 +748,8 @@ body.cpg-dragging { cursor: grabbing; user-select: none; }
   opacity: .85;
   transform: rotate(-7deg);
   box-shadow: inset 0 0 0 1px rgba(29, 95, 208, .25);
-  animation: cpg-stamp-in .22s ease-out;
 }
+.cpg-stamp.is-new { animation: cpg-stamp-in .22s ease-out; }
 @keyframes cpg-stamp-in {
   from { opacity: 0; transform: rotate(-7deg) scale(1.6); }
   to   { opacity: .85; transform: rotate(-7deg) scale(1); }
@@ -758,12 +758,13 @@ body.cpg-dragging { cursor: grabbing; user-select: none; }
 /* 배분이 끝난 카드는 흐리게 — 글자·상자 아이콘 모두 */
 .cpg-sum-prod.is-done, .cpg-box-card.is-done { opacity: 1; }
 .cpg-sum-prod.is-done .cpg-sum-prod-name,
+.cpg-box-card.is-done .cpg-box-title { color: var(--color-midtone-gray); }
 .cpg-sum-prod.is-done .cpg-sum-prod-nums,
-.cpg-box-card.is-done .cpg-box-title,
 .cpg-box-card.is-done .cpg-box-items,
 .cpg-box-card.is-done .cpg-box-fillnum { color: var(--color-midtone-gray); opacity: .6; }
 .cpg-sum-prod.is-done .cpg-sum-prod-nums strong,
 .cpg-box-card.is-done .cpg-box-items b { color: var(--color-midtone-gray); }
 .cpg-box-card.is-done .cpg-box-svg { filter: grayscale(1); opacity: .45; }
 .cpg-box-card.is-done .cpg-box-bar { opacity: .4; }
-.cpg-sum-prod.is-done .cpg-stamp, .cpg-box-card.is-done .cpg-stamp { opacity: .85; }
+/* 도장은 카드가 흐려져도 또렷하게 유지 */
+.cpg-sum-prod.is-done .cpg-stamp, .cpg-box-card.is-done .cpg-stamp { opacity: 1; }