fix(引用回复): 仅在回复内容非空时启用引用回复

修复引用回复逻辑，避免在回复内容为空时错误地引用上一条消息。
同时增强保存引用消息时的空值检查，确保只有有效的消息内容被保存。

app/src/main/java/org/yameida/worktool/service/WeworkController.kt

@@ -67,8 +67,10 @@ object WeworkController {
     @RequestMapping
     fun sendMessage(message: WeworkMessageBean): Boolean {
         LogUtils.d("REQUEST sendMessage(): ${message.messageId} ${message.titleList} ${message.receivedContent} ${message.at} ${message.atList?.joinToString()}")
-        // 如果有待引用消息，自动使用引用回复
-        val result = if (!lastReceivedMessage.isNullOrBlank() && !lastReceivedName.isNullOrBlank()) {
+        // 如果有待引用消息且有回复内容，才使用引用回复
+        val result = if (!lastReceivedMessage.isNullOrBlank()
+            && !lastReceivedName.isNullOrBlank()
+            && !message.receivedContent.isNullOrBlank()) {
             LogUtils.d("使用引用回复: ${lastReceivedName} -> $lastReceivedMessage")
             val replyResult = WeworkOperationImpl.replyMessage(
                 message,

app/src/main/java/org/yameida/worktool/service/WeworkLoopImpl.kt

@@ -354,13 +354,15 @@ object WeworkLoopImpl {
                 WeworkController.weworkService.webSocketManager.send(messageBean)
                 // 保存最后收到的消息内容，用于回复时引用
                 val lastMsg = messageList.lastOrNull()
-                if (lastMsg != null && lastMsg.sender == 0) {
-                    val msgContent = lastMsg.itemMessageList.lastOrNull()?.text ?: ""
-                    val senderName = lastMsg.nameList.firstOrNull() ?: ""
+                if (lastMsg != null && lastMsg.sender == 0 && lastMsg.itemMessageList != null) {
+                    val msgContent = lastMsg.itemMessageList.lastOrNull()?.text?.takeIf { it.isNotBlank() } ?: ""
+                    val senderName = lastMsg.nameList?.firstOrNull()?.takeIf { it.isNotBlank() } ?: ""
+                    if (msgContent.isNotBlank() && senderName.isNotBlank()) {
                         WeworkController.lastReceivedMessage = msgContent
                         WeworkController.lastReceivedName = senderName
                         LogUtils.d("保存最后消息用于引用: $senderName: $msgContent")
                     }
+                }
                 //推测是否回复并在房间等待指令
                 if (needInfer) {
                     val lastMessage = messageList.lastOrNull()