fix: OKX options buy/close orders with tick alignment and reduceOnly

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

lib/options/templates/options_panel.html

@@ -5,7 +5,7 @@
     {% if not options_enabled %}
     <div class="flash" style="margin-bottom:12px">期权 API 未启用：请在 <code>crypto_monitor_okx/.env</code> 设置 <code>OKX_OPTIONS_ENABLED=true</code> 及主账户 <code>OKX_OPTIONS_API_*</code>，然后 <code>pm2 restart crypto_okx --update-env</code>。</div>
     {% endif %}
-    <p class="muted options-hint">资金账户兑换 USDT→USDC 后，划转到交易账户即可买入。报价单位为每 1 ETH/BTC；1 张 = 0.01 ETH/BTC。</p>
+    <p class="muted options-hint">资金账户兑换 USDT→USDC 后，划转到交易账户即可买入。报价单位为每 1 ETH/BTC；1 张 = 0.01 ETH/BTC。表格中点「买入」直接下单；或点「选择」后在下方确认张数再买入。</p>
 
     <div class="options-funds-grid">
         <div class="options-funds-col">
@@ -128,4 +128,4 @@
         </div>
     </div>
 </div>
-<script src="/static/options_panel.js?v=1"></script>
+<script src="/static/options_panel.js?v=2"></script>