Add ITM and OTM filter toggles to options chain.

Default to in-the-money view with at-the-money contracts included; update expiry counts and empty states for the active filter.

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

lib/options/templates/options_panel.html

@@ -14,6 +14,8 @@
                 <select id="opt-exp-select"><option value="">选择到期日</option></select>
                 <button type="button" class="btn-secondary opt-type-btn active" data-type="C">看涨 Call</button>
                 <button type="button" class="btn-secondary opt-type-btn" data-type="P">看跌 Put</button>
+                <button type="button" class="btn-secondary opt-money-btn active" data-money="itm">实值</button>
+                <button type="button" class="btn-secondary opt-money-btn" data-money="otm">虚值</button>
                 <button type="button" class="btn-secondary" id="opt-load-chain">刷新链</button>
             </div>
             <div id="opt-index-line" class="muted"></div>
@@ -139,4 +141,4 @@
     </div>
 </div>
 <script src="/static/options_expiry_countdown.js?v=1"></script>
-<script src="/static/options_panel.js?v=18"></script>
+<script src="/static/options_panel.js?v=19"></script>