style(dispatch): 생성시각 표시에서 T·타임존 오프셋 제거

- 2026-06-22T15:17:59+09:00 → 2026-06-22 15:17:59 (현지 입력 시각 그대로)

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

app/modules/dispatch/templates/dispatch/batches.html

@@ -34,7 +34,7 @@
               <span style="color:#16a34a;font-weight:600;">{{ b.done_count }} ✓</span>
               {% else %}{{ b.done_count }}{% endif %}
             </td>
-            <td class="erp-muted" style="white-space:nowrap;">{{ b.created_at }}</td>
+            <td class="erp-muted" style="white-space:nowrap;">{{ (b.created_at[:19].replace('T',' ')) if b.created_at else '' }}</td>
             <td style="text-align:right;white-space:nowrap;">
               <a class="erp-btn erp-btn-outline" href="/dispatch/batches/{{ b.id }}" data-ko="작업" data-en="Work">작업</a>
               <a class="erp-btn erp-btn-outline" href="/dispatch/batches/{{ b.id }}/picking" data-ko="피킹" data-en="Picking">피킹</a>