diff --git a/src/renderer/api/SessionsApi.ts b/src/renderer/api/SessionsApi.ts
index d2a5a6d..9ccc5a2 100644
--- a/src/renderer/api/SessionsApi.ts
+++ b/src/renderer/api/SessionsApi.ts
@@ -86,7 +86,7 @@ export const getSessionMessages = async (params: SessionMessagesRequest) => {
 
 
 
-/// PATCH /api/sessions/{session_id} 的请求参数和响应数据结构
+/// /api/sessions/{session_id} 的请求参数和响应数据结构
 export interface UpdateSessionRequest {
   session_id: string
   title: string
@@ -98,7 +98,7 @@ export interface UpdateSessionResponse {
 
 // 更新会话信息 的函数实现
 export const updateSession = async (params: UpdateSessionRequest) => {
-  const res: ResponseModel = await patchRequest(`/nianxx/api/sessions/${params.session_id}`, {
+  const res: ResponseModel = await postRequest(`/nianxx/api/sessions/${params.session_id}/rename`, {
     title: params.title,
   })
   return res.data as UpdateSessionResponse
@@ -106,7 +106,7 @@ export const updateSession = async (params: UpdateSessionRequest) => {
 
 
 
-/// DELETE /api/sessions/{session_id} 的请求参数和响应数据结构
+/// /api/sessions/{session_id} 的请求参数和响应数据结构
 export interface DeleteSessionRequest {
   session_id: string
 }
@@ -117,6 +117,6 @@ export interface DeleteSessionResponse {
 
 // 删除会话 的函数实现
 export const deleteSession = async (params: DeleteSessionRequest) => {
-  const res: ResponseModel = await deleteRequest(`/nianxx/api/sessions/${params.session_id}`)
+  const res: ResponseModel = await postRequest(`/nianxx/api/sessions/${params.session_id}/delete`, {})
   return res.data as DeleteSessionResponse
 }
\ No newline at end of file
diff --git a/src/renderer/views/home/ChatBox.vue b/src/renderer/views/home/ChatBox.vue
index 0e84e56..1b745c1 100644
--- a/src/renderer/views/home/ChatBox.vue
+++ b/src/renderer/views/home/ChatBox.vue
@@ -110,8 +110,8 @@ watch(isGuidePage, (v) => {
   emit('update:guide', v);
   if (v) {
     // 当切换到引导页时，重置/清理会话状态
+    conversationId.value = '';
     resetConversation();
-    createConversationRequest();
   }
 });
 
@@ -129,11 +129,15 @@ const isSendingMessage = ref(false);
 const agentId = ref("1953462165250859011");
 /// 会话ID 历史数据接口中获取
 const conversationId = ref(props.conversationId);
+// 标记 conversationId 是否来自历史消息（由 props.conversationId 提供）
+const conversationIdFromHistory = ref(!!props.conversationId);
 
 // 监听 conversationId prop 变化，只有当有值时（选择历史消息）才请求消息列表
 watch(() => props.conversationId, (newId) => {
   if (newId) {
     conversationId.value = newId;
+    console.log("外部 conversationId 变化，加载对应消息：", newId);
+    conversationIdFromHistory.value = true;
     loadConversationMessages(newId);
   }
 });
@@ -278,7 +282,6 @@ const initHandler = async () => {
   console.log("initHandler：检查 token 并初始化数据");
   const token = getAccessToken();
   if (!token) return;
-  await createConversationRequest();
   await initWebSocket();
 };
 
@@ -299,6 +302,8 @@ const createConversationRequest = async (): Promise<string | null> => {
   const res = await createSession({});
   if (res && res.session_id) {
     conversationId.value = res.session_id;
+    // 新创建的 session 不是来源于历史
+    conversationIdFromHistory.value = false;
     console.log("创建新会话，ID:", conversationId.value);
     return res.session_id;
   } else {
@@ -538,6 +543,16 @@ const sendMessage = async (message: string, isInstruct: boolean = false) => {
 
   await checkToken();
 
+  // 如果没有 conversationId（且非历史来源），在发送时按需创建会话
+  if (!conversationId.value) {
+    const sid = await createConversationRequest();
+    if (!sid) {
+      ElMessage({ message: '创建会话失败，请稍后重试', type: 'error' });
+      console.error('createConversationRequest failed before send');
+      return;
+    }
+  }
+
   // 检查WebSocket连接状态，如果未连接，尝试重新连接
   if (!isWsConnected()) {
     console.log("WebSocket未连接，尝试重新连接...");
@@ -575,6 +590,7 @@ const sendMessage = async (message: string, isInstruct: boolean = false) => {
     messageId: IdUtils.generateMessageId(),
     messageRole: MessageRole.ME,
     messageContent: message,
+    messageContentList: [],
     timestamp: Date.now(),
   };
   chatMsgList.value.push(newMsg);
@@ -709,6 +725,8 @@ const sendChat = async (message: string, isInstruct = false) => {
     messageId: currentSessionMessageId,
     messageRole: MessageRole.AI,
     messageContent: "加载中",
+    messageContentList: [],
+    timestamp: Date.now(),
     isLoading: true,
   };
 
@@ -846,6 +864,10 @@ const resetConversation = () => {
     pendingTimeouts.clear();
     pendingMap.clear();
 
+    // 如果 conversationId 不是来自历史，重置 conversationId
+    if (!conversationIdFromHistory.value) {
+      conversationId.value = '';
+    }
     // 清理消息与状态
     chatMsgList.value = [];
     inputMessage.value = '';
diff --git a/src/renderer/views/home/ChatHistory.vue b/src/renderer/views/home/ChatHistory.vue
index ec611d9..790a730 100644
--- a/src/renderer/views/home/ChatHistory.vue
+++ b/src/renderer/views/home/ChatHistory.vue
@@ -157,10 +157,11 @@ onMounted(() => {
 const getHistoryConversationList = async () => {
 	const list = await getSessionList({ limit: 50, offset: 0 })
 	if (!list || !list.sessions) return;
-	groups.value.push(...list.sessions.map((item: any) => ({
+	// 使用整体赋值替换 push，避免重复累加
+	groups.value = list.sessions.map((item: any) => ({
 		conversationId: item.session_id,
 		conversationTitle: item.title
-	})))
+	}))
 }
 
 </script>
diff --git a/src/renderer/views/home/components/ChatRoleAI.vue b/src/renderer/views/home/components/ChatRoleAI.vue
index 01b70eb..964db8d 100644
--- a/src/renderer/views/home/components/ChatRoleAI.vue
+++ b/src/renderer/views/home/components/ChatRoleAI.vue
@@ -1,13 +1,14 @@
 <template>
   <div class="max-w-[75%] flex flex-col">
     <slot name="header"></slot>
-    <div v-if="!msg.messageContentList" class="flex flex-row text-sm text-gray-700">
+    <div v-if="!msg.messageContentList || msg.messageContentList.length === 0"
+      class="flex flex-row text-sm text-gray-700">
       <div v-html="compiledMarkdown"></div>
       <ChatLoading v-if="msg.isLoading" />
     </div>
 
-    <div v-else class="flex flex-col p-2 mb-2 text-sm text-gray-700 bg-[#f7f9fc] rounded-md" 
-         v-for="(_, index) in msg.messageContentList" :key="index">
+    <div v-else class="flex flex-col p-2 mb-2 text-sm text-gray-700 bg-[#f7f9fc] rounded-md"
+      v-for="(_, index) in msg.messageContentList" :key="index">
       <div v-html="compiledAt(index)"></div>
     </div>
 
diff --git a/src/renderer/views/home/index.vue b/src/renderer/views/home/index.vue
index efd48e3..24796d2 100644
--- a/src/renderer/views/home/index.vue
+++ b/src/renderer/views/home/index.vue
@@ -1,7 +1,7 @@
 <template>
   <layout>
     <div class="flex h-full w-full flex-col md:flex-row">
-      <ChatHistory class="flex-none w-50" @new-chat="guide = true" @select-chat="handleSelectChat" />
+      <ChatHistory class="flex-none w-50" @new-chat="handleNewChat" @select-chat="handleSelectChat" />
       <div class="flex-1 mr-2 overflow-hidden bg-white rounded-xl">
         <ChatBox v-model:guide="guide" :conversationId="selectedConversationId" />
       </div>
@@ -20,6 +20,12 @@ const guide = ref(true)
 /// 选择的历史会话ID
 const selectedConversationId = ref('')
 
+/// 处理新对话事件：切换到引导页并清空选中的历史会话ID
+const handleNewChat = () => {
+  guide.value = true;
+  selectedConversationId.value = '';
+};
+
 /// 选择历史会话
 const handleSelectChat = (conversationId: string) => {
   guide.value = false;