Hide zero USDT in options balance labels and add swap/transfer all buttons.

Skip 0 balances in header display; fill max funding/trading amount on 全部兑换/全部划转.

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

lib/options/templates/options_settings_transfer.html

@@ -14,6 +14,7 @@
             <option value="funding">to: 资金</option>
         </select>
         <input type="number" id="opt-set-int-amount" min="0.01" step="0.01" placeholder="数量">
+        <button type="button" class="btn-secondary btn-sm" id="opt-set-int-all-btn">全部划转</button>
         <button type="button" class="btn-primary btn-sm" id="opt-set-int-btn">划转</button>
     </div>
     <div id="opt-set-int-msg" class="options-settings-msg muted"></div>
@@ -42,6 +43,7 @@
             <option value="funding">to: 资金</option>
         </select>
         <input type="number" id="opt-set-cross-amount" min="0.01" step="0.01" placeholder="数量">
+        <button type="button" class="btn-secondary btn-sm" id="opt-set-cross-all-btn">全部划转</button>
         <button type="button" class="btn-primary btn-sm" id="opt-set-cross-btn">划转</button>
     </div>
     <div id="opt-set-cross-msg" class="options-settings-msg muted"></div>