feat(预约系统): 添加客服备注功能及样式

- 在公告页面和预约管理页面添加客服备注功能
- 为客服备注添加专用样式区分于客户备注
- 实现通过模态框编辑和保存客服备注的AJAX功能
- 将原备注字段明确标记为客户备注

announcement.php

@@ -245,6 +245,29 @@ try {
             font-size: 0.9rem;
         }
         
+        /* 客服备注样式 */
+        .service-notes {
+            margin-top: 12px;
+            padding: 12px;
+            background-color: #f8f9fa;
+            border-left: 4px solid #007bff;
+            border-radius: 4px;
+        }
+
+        .service-notes h4 {
+            margin-top: 0;
+            margin-bottom: 8px;
+            font-size: 14px;
+            color: #007bff;
+        }
+
+        .service-notes p {
+            margin: 0;
+            font-size: 13px;
+            color: #495057;
+            line-height: 1.5;
+        }
+        
         .no-bookings {
             text-align: center;
             padding: 60px 20px;
@@ -353,9 +376,6 @@ try {
                             if (!empty($booking['services'])) {
                                 $services = explode(',', $booking['services']);
                             }
-                            if (!empty($booking['custom_services'])) {
-                                $services[] = $booking['custom_services'];
-                            }
                         ?>
                         <div class="booking-card <?php echo $card_class; ?>">
                             <div class="booking-time">
@@ -410,11 +430,19 @@ try {
                                         </ul>
                                     </div>
                                 <?php endif; ?>
+                                 
+                                <!-- 客服备注 -->
+                                <?php if (!empty($booking['custom_services'])): ?>
+                                    <div class="service-notes">
+                                        <h4>客服备注：</h4>
+                                        <p><?php echo htmlspecialchars($booking['custom_services']); ?></p>
+                                    </div>
+                                <?php endif; ?>
                                 
                                 <!-- 备注信息 -->
                                 <?php if (!empty($booking['notes'])): ?>
                                     <div class="detail-row">
-                                        <span class="detail-label">备注</span>
+                                        <span class="detail-label">客户备注</span>
                                         <span class="detail-value"><?php echo htmlspecialchars($booking['notes']); ?></span>
                                     </div>
                                 <?php endif; ?>