Add two-day amplitude window to amp-stats.

For each settlement day, also compute H-L over start minus one day through 16:00 (e.g. 25 16:00 to 27 16:00).

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/static/index.html

@@ -1275,7 +1275,7 @@
           </div>
         </div>
         <p id="amp-status" class="toolbar-meta amp-status"></p>
-        <p class="amp-hint">口径:开→高=最高−开盘;开→低=开盘−最低;振幅=最高−最低.填写波动点数后看振幅≥该点数的天数占比;日表显示两边波动(开→高/开→低)与振幅是否达标.周末按结算日标注/筛选.</p>
+        <p class="amp-hint">口径:开→高=最高−开盘;开→低=开盘−最低;振幅=最高−最低.两日振幅=起点再往前推1天到当日16:00(例:25日16:00→27日16:00).填写波动点数后看振幅/两日振幅≥该点数的天数占比.周末按结算日标注/筛选.</p>
         <h3 class="amp-block-title">汇总</h3>
         <div id="amp-summary" class="amp-summary"></div>
         <h3 class="amp-block-title">振幅占比</h3>
@@ -1286,11 +1286,11 @@
             <thead>
               <tr>
                 <th>结算日</th><th>窗起点</th><th>开</th><th>高</th><th>低</th><th>收</th>
-                <th>开→高</th><th>开→低</th><th>振幅</th><th>涨跌</th><th>振幅达标</th>
+                <th>开→高</th><th>开→低</th><th>振幅</th><th>两日振幅</th><th>涨跌</th><th>振幅达标</th>
               </tr>
             </thead>
             <tbody id="amp-table-body">
-              <tr><td colspan="11" class="amp-empty">点击「计算」加载</td></tr>
+              <tr><td colspan="12" class="amp-empty">点击「计算」加载</td></tr>
             </tbody>
           </table>
         </div>