feat: options UI scroll layout, stats card, funding balance, and cross-account transfer

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

lib/options/templates/options_settings_panel.html

@@ -44,10 +44,15 @@
                 <option value="USDT" selected>USDT</option>
                 <option value="USDC">USDC</option>
             </select>
-            <select id="opt-set-cross-acct">
+            <select id="opt-set-cross-from-acct">
                 <option value="funding" selected>资金账户</option>
                 <option value="trading">交易账户</option>
             </select>
+            <span>→</span>
+            <select id="opt-set-cross-to-acct">
+                <option value="trading" selected>交易账户</option>
+                <option value="funding">资金账户</option>
+            </select>
             <select id="opt-set-cross-dir">
                 <option value="sub_to_main" selected>子账户 → 主账户</option>
                 <option value="main_to_sub">主账户 → 子账户</option>
@@ -58,4 +63,4 @@
         <div id="opt-set-cross-msg" class="muted"></div>
     </div>
 </div>
-<script src="/static/options_settings.js?v=1"></script>
+<script src="/static/options_settings.js?v=2"></script>