feat(my-patients): 修改按钮文本为“消息管理”

src/pages/doctor/index/my-patients.vue

@@ -17,7 +17,7 @@
       
       <view class="action-buttons">
         <button class="action-btn primary" @click="viewHealthData(patient)">健康数据</button>
-        <button class="action-btn info" @click="viewMessageHistory(patient)">消息记录</button>
+        <button class="action-btn info" @click="viewMessageHistory(patient)">消息管理</button>
         <button class="action-btn danger" @click="unbindPatient(patient)">解除绑定</button>
       </view>
     </view>