feat(context): 新增上下文记忆功能，支持在对话中保持用户输入上下文信息

src/components/chat/ChatMain.vue

@@ -152,6 +152,15 @@ async function handleSend(text: string, attachments: Attachment[], options?: { d
     chatStore.createConversation();
   }
 
+  // 从当前会话中提取历史消息（用于上下文记忆），在添加新消息之前提取
+  const existingMessages = currentConversation.value?.messages || [];
+  const MAX_HISTORY_ROUNDS = 20; // 最多保留最近 20 轮（40 条消息）
+  const historyMessages = existingMessages
+    .filter((m: any) => m.role === MessageRole.USER || m.role === MessageRole.ASSISTANT)
+    .filter((m: any) => m.content?.text) // 过滤掉空消息
+    .slice(-(MAX_HISTORY_ROUNDS * 2))
+    .map((m: any) => ({ role: m.role, content: m.content.text }));
+
   // 添加用户消息
   chatStore.addMessage(MessageRole.USER, {
     type: MessageType.TEXT,
@@ -189,9 +198,10 @@ async function handleSend(text: string, attachments: Attachment[], options?: { d
         message: text,
         conversationId: currentConversation.value?.id || "",
         images: imageUrls,
-        files: fileUrls, // 传递文件 URL，后端会读取内容
+        files: fileUrls,
         model: settings.value.defaultModel,
         stream: true,
+        history: historyMessages,
         deepSearch: options?.deepSearch,
         webSearch: options?.webSearch,
         deepThinking: options?.deepThinking,
@@ -259,6 +269,15 @@ async function handleRetry(messageId: string) {
   const userMessage = messages.value[messageIndex - 1];
   if (userMessage.role !== MessageRole.USER) return;
 
+  // 提取重试位置之前的历史消息（用于上下文记忆）
+  const MAX_HISTORY_ROUNDS = 20;
+  const priorMessages = messages.value
+    .slice(0, messageIndex - 1) // 不包含当前 user 消息和要重试的 assistant 消息
+    .filter((m: any) => m.role === MessageRole.USER || m.role === MessageRole.ASSISTANT)
+    .filter((m: any) => m.content?.text)
+    .slice(-(MAX_HISTORY_ROUNDS * 2))
+    .map((m: any) => ({ role: m.role, content: m.content.text }));
+
   // 重置消息状态
   chatStore.updateMessage(messageId, {
     isError: false,
@@ -279,6 +298,7 @@ async function handleRetry(messageId: string) {
         conversationId: currentConversation.value?.id,
         model: settings.value.defaultModel,
         stream: true,
+        history: priorMessages,
       },
       abortController.value.signal,
     );

src/services/api.ts

@@ -40,6 +40,8 @@ export interface ChatRequest {
   maxTokens?: number;
   systemPrompt?: string;
   stream?: boolean;
+  // 历史对话消息（用于上下文记忆）
+  history?: { role: string; content: string }[];
   // 扩展选项
   deepSearch?: boolean;
   webSearch?: boolean;
@@ -107,22 +109,26 @@ class ChatApi {
     }
 
     // 将前端简化的请求翻译为 OpenAI 兼容的规范请求体
+    // 构建 messages 数组：system + 历史消息 + 当前用户消息
+    const systemMessage = {
+      role: "system",
+      content: request.systemPrompt || "你是一个智能助手，可以分析用户发送的文字，文件或图片内容，并进行回答。",
+    };
+    const currentUserMessage = {
+      role: "user",
+      content: userContent,
+    };
+    const allMessages = request.history && request.history.length > 0
+      ? [systemMessage, ...request.history, currentUserMessage]
+      : [systemMessage, currentUserMessage];
+
     const openAiRequest = {
-      model: request.model || "glm-4-flash", // 可能需要指定支持视觉的模型
-      messages: [
-        {
-          role: "system",
-          content: request.systemPrompt || "你是一个智能助手，可以分析用户发送的文字，文件或图片内容，并进行回答。",
-        },
-        {
-          role: "user",
-          content: userContent,
-        },
-      ],
+      model: request.model || "glm-4-flash",
+      messages: allMessages,
       stream: true,
       temperature: request.temperature,
       max_tokens: request.maxTokens,
-      files: request.files || [],  // 传递文件 URL 列表给后端
+      files: request.files || [],
       // 扩展参数传递给我们的 Python 后端进行特殊处理
       deepSearch: request.deepSearch,
       webSearch: request.webSearch,