feat(malaysia): 재고조사 랙(rack) 박스 단위 입력

낱개/콤보 평면 수량 그리드를 창고 랙 그림(A/B 36칸) 입력으로 대체.
각 칸에 아이템·박스당 입수량·박스 수를 넣고 + 로 한 칸 여러 아이템 추가.
저장 시 SKU별 qty=SUM(입수량×박스수) 집계로 daily_stocktake_line 재생성.
이후 분해/확정 로직은 라인 기준 그대로 동작.

- DB: daily_stocktake_rack 테이블 + grant (멱등)
- store: rack_cell_codes/rack_layout/aggregate_rack 순수함수
- db: list_rack_entries/replace_rack(1 트랜잭션, draft만)
- router: rack 컨텍스트 + POST /stocktakes/{id}/rack/bulk
- UI: 랙 보드 템플릿 + malaysia_rack.js(행 추가/삭제·실시간 소계)
- 테스트 4건 추가(18 전부 통과)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/modules/malaysia/templates/malaysia/_i18n.html

@@ -2,4 +2,4 @@
 <div style="display:flex;justify-content:flex-end;margin-bottom:8px;">
   <button type="button" id="mys-lang-toggle" class="erp-btn erp-btn-outline">ENG</button>
 </div>
-<script src="/static/malaysia.js?v=20260612b"></script>
+<script src="/static/malaysia.js?v=20260614a"></script>

app/modules/malaysia/templates/malaysia/stocktake_detail.html

@@ -1,14 +1,56 @@
 {% extends "erp_base.html" %}
 
+{% macro rack_row(cell, items, entry=None, disabled=False) %}
+<div class="rk-row">
+  <input type="hidden" name="rk_cell" value="{{ cell }}">
+  <select name="rk_sku" class="erp-input rk-sku" {% if disabled %}disabled{% endif %}>
+    <option value="">— 선택 —</option>
+    {% for it in items %}
+    <option value="{{ it.item_code }}" {% if entry and entry.sku_code == it.item_code %}selected{% endif %}>{{ it.item_code }} · {{ it.item_name }}</option>
+    {% endfor %}
+  </select>
+  <input class="erp-input rk-upb" type="number" min="1" name="rk_upb" placeholder="입수량"
+         value="{{ entry.units_per_box if entry else '' }}" {% if disabled %}disabled{% endif %} />
+  <span class="rk-x">×</span>
+  <input class="erp-input rk-box" type="number" min="1" name="rk_box" placeholder="박스"
+         value="{{ entry.box_count if entry else '' }}" {% if disabled %}disabled{% endif %} />
+  <span class="rk-sub">{{ (entry.units_per_box * entry.box_count) if entry else 0 }}</span>
+  {% if not disabled %}<button type="button" class="rk-del" title="행 삭제">×</button>{% endif %}
+</div>
+{% endmacro %}
+
 {% block head_extra %}
 <style>
   .mys-compact .erp-table th,
   .mys-compact .erp-table td { padding-top:4px; padding-bottom:4px; }
-  .mys-compact .erp-input { padding-top:4px; padding-bottom:4px; }
-  .mys-compact td.nm { white-space:nowrap; }
-  .mys-compact th.ccol, .mys-compact td.ccol { white-space:nowrap; width:88px; }
-  .mys-compact .qcol { width:110px; }
-  .mys-compact .qcol .erp-input { width:100px; }
+  /* 랙 보드 */
+  .rack-board { display:flex; gap:24px; flex-wrap:wrap; }
+  .rack-side { flex:1 1 480px; }
+  .rack-side h3 { text-align:center; margin:0 0 8px; }
+  .rack-row { display:grid; grid-template-columns:repeat(6, 1fr); gap:6px; margin-bottom:6px; }
+  .rack-cell {
+    border:1px solid #cbd5e1; border-radius:6px; padding:4px;
+    background:#f8fafc; min-height:84px; display:flex; flex-direction:column;
+  }
+  .rack-cell-head {
+    display:flex; align-items:center; justify-content:space-between;
+    font-size:11px; font-weight:600; color:#475569; margin-bottom:3px;
+  }
+  .rack-cell-head .rk-cell-total { color:#0f172a; }
+  .rack-cell-head .rk-add {
+    border:1px solid #94a3b8; background:#fff; border-radius:4px;
+    width:18px; height:18px; line-height:1; padding:0; cursor:pointer; font-weight:700;
+  }
+  .rk-rows { display:flex; flex-direction:column; gap:3px; }
+  .rk-row { display:grid; grid-template-columns: 1fr 38px 8px 32px 30px 16px; gap:2px; align-items:center; }
+  .rk-row .rk-sku { font-size:10px; padding:1px 2px; }
+  .rk-row .rk-upb, .rk-row .rk-box { font-size:10px; padding:1px 2px; text-align:right; }
+  .rk-row .rk-x { font-size:10px; color:#94a3b8; text-align:center; }
+  .rk-row .rk-sub { font-size:10px; text-align:right; color:#2563eb; font-weight:600; }
+  .rk-row .rk-del {
+    border:none; background:transparent; color:#dc2626; cursor:pointer;
+    font-size:13px; line-height:1; padding:0;
+  }
 </style>
 {% endblock %}
 
@@ -19,8 +61,8 @@
     <a class="erp-btn erp-btn-primary" href="/malaysia/stocktakes?wh={{ stocktake.warehouse_code }}">◀◀ 조사 목록</a>
   </div>
 
-  <form method="post" action="/malaysia/stocktakes/{{ stocktake.id }}/lines/bulk">
-    <div style="display:grid;grid-template-columns:280px 1fr 1fr;gap:16px;align-items:start;">
+  <form method="post" action="/malaysia/stocktakes/{{ stocktake.id }}/rack/bulk">
+    <div style="display:grid;grid-template-columns:280px 1fr;gap:16px;align-items:start;">
 
       <!-- 좌: 정보 + 동작 -->
       <div class="erp-card">
@@ -40,6 +82,10 @@
         <p style="color:#b91c1c;font-weight:600;margin-top:10px;">⚠ BOM 없는 콤보: {{ missing_bom|join(', ') }}</p>
         {% endif %}
 
+        <p class="erp-muted" style="margin-top:10px;font-size:12px;">
+          <span class="i18n">랙 칸에 아이템·입수량(박스당 개수)·박스 수를 입력하면 낱개/콤보 수량이 자동 집계됩니다. 한 칸에 여러 아이템은 + 로 추가하세요.</span>
+        </p>
+
         {% if is_draft %}
         <div class="erp-page-actions" style="margin-top:12px;">
           <button type="submit" class="erp-btn erp-btn-primary">입력 저장</button>
@@ -47,48 +93,49 @@
         {% endif %}
       </div>
 
-      <!-- 중: 낱개 -->
+      <!-- 우: 랙 보드 -->
       <div class="erp-card">
-        <div class="cpg-card-head"><h2>낱개 상품</h2></div>
-        <div class="erp-table-wrap" style="margin-top:8px;">
-          <table class="erp-table">
-            <thead><tr><th class="ccol">Code</th><th>Name</th><th class="qcol">Qty</th></tr></thead>
-            <tbody>
-              {% for it in individual_items %}
-              <tr>
-                <td class="ccol">{{ it.item_code }}</td>
-                <td class="nm" data-en="{{ it.item_name }}" data-ko="{{ ko_names.get(it.item_code, it.item_name) }}">{{ it.item_name }}</td>
-                <td class="qcol"><input class="erp-input" type="number" min="0" name="qty_{{ it.item_code }}"
-                       value="{{ entered.get(it.item_code, '') }}" placeholder="—" {% if not is_draft %}disabled{% endif %} /></td>
-              </tr>
+        <div class="cpg-card-head"><h2>랙 입력 (박스 단위)</h2></div>
+        <div class="rack-board" style="margin-top:10px;">
+          {% for side in rack_layout %}
+          <div class="rack-side">
+            <h3>Side {{ side.side }}</h3>
+            {% for row in side.rows %}
+            <div class="rack-row">
+              {% for col in row.cols %}
+                {% for cell in col %}
+                <div class="rack-cell" data-cell="{{ cell }}">
+                  <div class="rack-cell-head">
+                    <span>{{ cell }}</span>
+                    <span class="rk-cell-total">∑ <b class="rk-cell-total-v">0</b></span>
+                    {% if is_draft %}<button type="button" class="rk-add" title="아이템 추가">+</button>{% endif %}
+                  </div>
+                  <div class="rk-rows">
+                    {% set entries = rack_by_cell.get(cell, []) %}
+                    {% for e in entries %}
+                      {{ rack_row(cell, rack_items, entry=e, disabled=(not is_draft)) }}
+                    {% endfor %}
+                    {% if is_draft and not entries %}
+                      {{ rack_row(cell, rack_items) }}
+                    {% endif %}
+                  </div>
+                </div>
+                {% endfor %}
               {% endfor %}
-            </tbody>
-          </table>
-        </div>
-      </div>
-
-      <!-- 우: 콤보 -->
-      <div class="erp-card">
-        <div class="cpg-card-head"><h2>콤보 상품</h2></div>
-        <div class="erp-table-wrap" style="margin-top:8px;">
-          <table class="erp-table">
-            <thead><tr><th class="ccol">Set Code</th><th>Set Name</th><th class="qcol">Qty</th></tr></thead>
-            <tbody>
-              {% for it in set_items %}
-              <tr>
-                <td class="ccol">{{ it.item_code }}</td>
-                <td class="nm" data-en="{{ it.item_name }}" data-ko="{{ ko_names.get(it.item_code, it.item_name) }}">{{ it.item_name }}</td>
-                <td class="qcol"><input class="erp-input" type="number" min="0" name="qty_{{ it.item_code }}"
-                       value="{{ entered.get(it.item_code, '') }}" placeholder="—" {% if not is_draft %}disabled{% endif %} /></td>
-              </tr>
-              {% endfor %}
-            </tbody>
-          </table>
+            </div>
+            {% endfor %}
+          </div>
+          {% endfor %}
         </div>
       </div>
     </div>
   </form>
 
+  <!-- JS 클론용 빈 행 템플릿(옵션 1벌만 보유) -->
+  <template id="rk-row-tpl">
+    {{ rack_row('', rack_items) }}
+  </template>
+
   <!-- 확정/취소/삭제 -->
   <div class="erp-page-actions" style="margin-top:12px;display:flex;gap:8px;flex-wrap:wrap;">
     {% if is_draft %}
@@ -135,4 +182,5 @@
     </div>
   </div>
 </section>
+<script src="/static/malaysia_rack.js?v=20260614a"></script>
 {% endblock %}