Add refund received toggle button and filter options

- Add refund_received column to claude_payment_status table
- API endpoint POST /api/tools/refund-received/{email} to toggle
- Clickable badge in table to mark refund as received/not received
- Filter options: refund received / refund not received

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

static/index.html

@@ -60,6 +60,8 @@
                     <option value="paid">已支付</option>
                     <option value="unpaid">未支付</option>
                     <option value="refunded">已退款</option>
+                    <option value="refund_received">退款已到账</option>
+                    <option value="refund_not_received">退款未到账</option>
                     <option value="suspended">已封号</option>
                     <option value="unchecked">未检测</option>
                 </select>
@@ -94,6 +96,7 @@
                             <th>令牌</th>
                             <th>支付状态</th>
                             <th>退款状态</th>
+                            <th>退款到账</th>
                             <th>支付时间</th>
                             <th>退款时间</th>
                             <th>封号时间</th>
@@ -104,7 +107,7 @@
                     </thead>
                     <tbody id="accountTableBody">
                         <tr>
-                            <td colspan="13">
+                            <td colspan="14">
                                 <div class="no-data">
                                     <i class="bi bi-inbox"></i>
                                     <div>暂无邮箱数据，点击"粘贴导入"添加</div>