feat期权链与持仓展示 Delta。

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

lib/options/templates/options_panel.html

@@ -87,6 +87,7 @@
                             <th>合约</th>
                             <th>卖一/张</th>
                             <th title="USDC:指数÷卖一;币本位:1÷卖一(卖一为币报价)">杠杆</th>
+                            <th title="OKX 行情 Delta(约 -1~1)">Delta</th>
                             <th>买一/张</th>
                             <th>到期平衡</th>
                             <th>平衡价差</th>
@@ -110,7 +111,7 @@
                         </tr>
                     </thead>
                     <tbody id="opt-strike-tbody">
-                        <tr><td colspan="9" class="muted">请选择到期日</td></tr>
+                        <tr><td colspan="10" class="muted">请选择到期日</td></tr>
                     </tbody>
                 </table>
             </div>
@@ -368,4 +369,4 @@
     </div>
 </div>
 <script src="/static/options_expiry_countdown.js?v=1"></script>
-<script src="/static/options_panel.js?v=72"></script>
+<script src="/static/options_panel.js?v=73"></script>