feat(malaysia): 입출고 일자별 낱개 수량 엑셀 다운로드

- '일괄 적용' 버튼명 '입력'으로 변경
- 입력 버튼 우측 '다운로드' 버튼 추가
- GET /malaysia/movements/export: 해당 일자/종류(IN/OUT) 낱개 합계를
  엑셀(A=사방넷코드, B=수량, C=이름)로 스트리밍
- db.daily_movement_totals(): 일자/종류별 낱개 합계 집계
- itemcode.sabangnet_code_map(): item_code → 사방넷 코드 매핑
- i18n 사전 '입력'/'다운로드' 추가, malaysia.js 캐시 버전 bump

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=20260611"></script>
+<script src="/static/malaysia.js?v=20260612"></script>

app/modules/malaysia/templates/malaysia/movements.html

@@ -42,8 +42,9 @@
           <label class="erp-field"><span>메모</span>
             <input class="erp-input" type="text" name="memo" /></label>
         </div>
-        <div class="erp-page-actions" style="margin-top:12px;">
-          <button type="submit" class="erp-btn erp-btn-primary">일괄 적용</button>
+        <div class="erp-page-actions" style="margin-top:12px;display:flex;gap:8px;">
+          <button type="submit" class="erp-btn erp-btn-primary">입력</button>
+          <button type="button" class="erp-btn erp-btn-outline" onclick="mysDownloadMovements(this)">다운로드</button>
         </div>
       </div>
 
@@ -87,6 +88,24 @@
     </div>
   </form>
 
+  <script>
+    function mysDownloadMovements(btn) {
+      var form = btn.closest('form');
+      var type = form.querySelector('[name=movement_type]').value;
+      var date = form.querySelector('[name=movement_date]').value;
+      var wh = form.querySelector('[name=warehouse_code]').value;
+      if (type !== 'IN' && type !== 'OUT') {
+        alert('다운로드는 IN(입고) 또는 OUT(출고)만 가능합니다.');
+        return;
+      }
+      if (!date) { alert('날짜를 선택하세요.'); return; }
+      var url = '/malaysia/movements/export?wh=' + encodeURIComponent(wh)
+        + '&type=' + encodeURIComponent(type)
+        + '&date=' + encodeURIComponent(date);
+      window.location.href = url;
+    }
+  </script>
+
   <!-- 이동 이력 -->
   <div class="erp-card" style="margin-top:16px;">
     <div class="cpg-card-head" style="display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;">