feat: 新增全局学习模式

src/components/chat/ChatHeader.vue

@@ -80,12 +80,21 @@
           </button>
         </div>
       </Transition>
+
+      <div class="learning-mode-toggle">
+        <span class="learning-mode-label">学习模式</span>
+        <FormSwitch
+          :model-value="settings.learningModeEnabled"
+          @update:model-value="settingsStore.setLearningModeEnabled($event)"
+        />
+      </div>
     </div>
   </header>
 </template>
 
 <script setup lang="ts">
 import { ref } from "vue";
+import { storeToRefs } from "pinia";
 import {
   Menu,
   Trash2,
@@ -97,6 +106,7 @@ import {
 import SidebarExpandIcon from "@/components/icons/custom/SidebarExpandIcon.vue";
 import SidebarCollapseIcon from "@/components/icons/custom/SidebarCollapseIcon.vue";
 import { useSettingsStore } from "@/stores/settings.ts";
+import FormSwitch from "@/components/ui/FormSwitch.vue";
 
 const props = withDefaults(
   defineProps<{
@@ -129,6 +139,7 @@ const emit = defineEmits<{
 
 const showMoreMenu = ref(false);
 const settingsStore = useSettingsStore();
+const { settings } = storeToRefs(settingsStore);
 
 function handleClear() {
   if (confirm("确定要清空当前对话吗？此操作不可恢复。")) {
@@ -244,6 +255,24 @@ if (typeof window !== "undefined") {
   position: relative;
 }
 
+.learning-mode-toggle {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-left: 8px;
+}
+
+.learning-mode-label {
+  font-size: 13px;
+  color: #6b7280;
+  user-select: none;
+  white-space: nowrap;
+
+  .dark & {
+    color: #9ca3af;
+  }
+}
+
 .header-btn {
   display: flex;
   align-items: center;

src/components/chat/ChatMain.vue

@@ -216,7 +216,10 @@ async function handleSend(
   }
 
   // 获取系统提示词（优先使用传入的，否则使用会话设置）
-  const systemPrompt = options?.systemPrompt || currentConversation.value?.settings?.systemPrompt;
+  const systemPrompt =
+    options?.systemPrompt ||
+    currentConversation.value?.settings?.systemPrompt ||
+    settings.value.defaultSystemPrompt;
 
   // 检查是否需要添加系统消息
   const existingMessages = currentConversation.value?.messages || [];
@@ -283,7 +286,7 @@ async function handleSend(
         deepSearch: options?.deepSearch,
         webSearch: options?.webSearch,
         deepThinking: options?.deepThinking,
-        systemPrompt: options?.systemPrompt,
+        systemPrompt,
       },
       abortController.value.signal,
     );
@@ -404,6 +407,9 @@ async function handleRetry(messageId: string) {
   currentStreamingMessageId.value = messageId;
   chatStore.startStreaming();
   abortController.value = new AbortController();
+  const systemPrompt =
+    currentConversation.value?.settings?.systemPrompt ||
+    settings.value.defaultSystemPrompt;
 
   try {
     const stream = chatApi.streamChat(
@@ -413,6 +419,7 @@ async function handleRetry(messageId: string) {
         model: settings.value.defaultModel,
         stream: true,
         history: priorMessages,
+        systemPrompt,
       },
       abortController.value.signal,
     );

src/components/modals/SettingsModal.vue

@@ -203,6 +203,8 @@
                 </div>
                 <textarea
                   class="prompt-textarea"
+                  :class="{ disabled: settings.learningModeEnabled }"
+                  :disabled="settings.learningModeEnabled"
                   :value="settings.defaultSystemPrompt"
                   rows="4"
                   placeholder="输入系统提示词..."
@@ -214,6 +216,9 @@
                     })
                   "
                 />
+                <p v-if="settings.learningModeEnabled" class="setting-desc">
+                  当前提示词已由学习模式接管，关闭学习模式后可恢复编辑。
+                </p>
               </div>
             </div>
 
@@ -849,6 +854,16 @@ function handleClearData() {
   &::placeholder {
     color: #9ca3af;
   }
+
+  &.disabled {
+    opacity: 0.7;
+    cursor: not-allowed;
+    background: #f3f4f6;
+
+    .dark & {
+      background: #252533;
+    }
+  }
 }
 
 .data-actions {

src/services/api.ts

@@ -3,6 +3,7 @@
  * 所有端点都是固定的，后端需要实现这些端点
  */
 import { getAuthHeaders } from './request';
+import { useSettingsStore } from "@/stores/settings";
 
 // API 端点定义（固定）
 const API_ENDPOINTS = {
@@ -24,6 +25,9 @@ const API_ENDPOINTS = {
   STOP: "/api/chat-ui/stop",
 };
 
+const DEFAULT_SYSTEM_PROMPT =
+  "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。";
+
 // 请求类型定义
 export interface ChatMessage {
   role: "user" | "assistant" | "system";
@@ -96,6 +100,24 @@ class ChatApi {
     this.baseUrl = baseUrl;
   }
 
+  private resolveSystemPrompt(explicit?: string): string {
+    if (explicit?.trim()) {
+      return explicit.trim();
+    }
+
+    try {
+      const settingsStore = useSettingsStore();
+      const fallbackPrompt = settingsStore.settings.defaultSystemPrompt;
+      if (fallbackPrompt?.trim()) {
+        return fallbackPrompt.trim();
+      }
+    } catch (error) {
+      console.warn("读取全局默认系统提示词失败，使用内置兜底提示词", error);
+    }
+
+    return DEFAULT_SYSTEM_PROMPT;
+  }
+
   /**
    * 流式对话
    */
@@ -135,9 +157,7 @@ class ChatApi {
         // 否则添加系统消息
         const systemMessage = {
           role: "system",
-          content:
+          content: this.resolveSystemPrompt(request.systemPrompt),
-            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。",
         };
         allMessages = [systemMessage, ...request.history, { role: "user", content: userContent }];
       }
@@ -145,9 +165,7 @@ class ChatApi {
       // 没有历史消息，添加系统消息
       const systemMessage = {
         role: "system",
-        content:
+        content: this.resolveSystemPrompt(request.systemPrompt),
-          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。",
       };
       allMessages = [systemMessage, { role: "user", content: userContent }];
     }
@@ -257,6 +275,7 @@ class ChatApi {
     const requestBody = {
       ...request,
       message: userContent,
+      systemPrompt: this.resolveSystemPrompt(request.systemPrompt),
     };
 
     const response = await fetch(`${this.baseUrl}${API_ENDPOINTS.CHAT}`, {

src/stores/settings.ts

@@ -1,6 +1,7 @@
 import { defineStore } from "pinia";
 import { ref } from "vue";
 import type { AppSettings, AIModel } from "@/types/chat";
+import promptData from "@/assets/prompt.json";
 
 // 分享结果类型
 export interface ShareResult {
@@ -13,6 +14,10 @@ export interface ShareResult {
 export const useSettingsStore = defineStore("settings", () => {
   const MIN_SIDEBAR_WIDTH = 310;
   const MAX_SIDEBAR_WIDTH = 400;
+  const LEARNING_MODE_PROMPT_TITLE = "让可学 AI 成为我的全科学习导师？";
+  const LEARNING_MODE_SYSTEM_PROMPT =
+    promptData["分析与实践"]?.[LEARNING_MODE_PROMPT_TITLE] ||
+    "你是一位“学习模式”引导员，通过严格的苏格拉底式提问法，引导用户自己思考并逐步得出答案。";
 
   // 默认设置
   const defaultSettings: AppSettings = {
@@ -31,6 +36,8 @@ export const useSettingsStore = defineStore("settings", () => {
     defaultTemperature: 0.7,
     defaultMaxTokens: 4096,
     defaultSystemPrompt: "你是一个有帮助的 AI 助手。",
+    learningModeEnabled: false,
+    learningModePrevDefaultSystemPrompt: "",
 
     // 功能设置
     enableSound: true,
@@ -223,9 +230,42 @@ export const useSettingsStore = defineStore("settings", () => {
     shareResult.value = null;
   }
 
+  function normalizeLearningModeState() {
+    if (!settings.value.learningModeEnabled) return;
+
+    const currentPrompt = settings.value.defaultSystemPrompt || "";
+    const isUsingLearningPrompt = currentPrompt === LEARNING_MODE_SYSTEM_PROMPT;
+
+    if (!isUsingLearningPrompt && !settings.value.learningModePrevDefaultSystemPrompt) {
+      settings.value.learningModePrevDefaultSystemPrompt = currentPrompt;
+    }
+
+    settings.value.defaultSystemPrompt = LEARNING_MODE_SYSTEM_PROMPT;
+  }
+
+  function setLearningModeEnabled(enabled: boolean) {
+    if (enabled) {
+      if (!settings.value.learningModePrevDefaultSystemPrompt) {
+        settings.value.learningModePrevDefaultSystemPrompt =
+          settings.value.defaultSystemPrompt || defaultSettings.defaultSystemPrompt;
+      }
+      settings.value.learningModeEnabled = true;
+      settings.value.defaultSystemPrompt = LEARNING_MODE_SYSTEM_PROMPT;
+    } else {
+      settings.value.learningModeEnabled = false;
+      if (settings.value.learningModePrevDefaultSystemPrompt) {
+        settings.value.defaultSystemPrompt =
+          settings.value.learningModePrevDefaultSystemPrompt;
+      }
+      settings.value.learningModePrevDefaultSystemPrompt = "";
+    }
+    saveToStorage();
+  }
+
   // 更新设置
   function updateSettings(updates: Partial<AppSettings>) {
     Object.assign(settings.value, updates);
+    normalizeLearningModeState();
 
     if (updates.theme) {
       applyTheme(updates.theme);
@@ -256,6 +296,7 @@ export const useSettingsStore = defineStore("settings", () => {
     try {
       const imported = JSON.parse(json);
       settings.value = { ...defaultSettings, ...imported };
+      normalizeLearningModeState();
       applyTheme(settings.value.theme);
       applyFontSize(settings.value.fontSize);
       saveToStorage();
@@ -304,6 +345,7 @@ export const useSettingsStore = defineStore("settings", () => {
       if (stored) {
         settings.value = { ...defaultSettings, ...JSON.parse(stored) };
       }
+      normalizeLearningModeState();
 
       const collapsedStored = localStorage.getItem("chat-sidebar-collapsed");
       if (collapsedStored) {
@@ -381,5 +423,6 @@ export const useSettingsStore = defineStore("settings", () => {
     loadFromStorage,
     getSelectedModelId,
     setSelectedModelId,
+    setLearningModeEnabled,
   };
 });

src/types/chat.ts

@@ -126,6 +126,8 @@ export interface AppSettings {
   defaultTemperature: number;
   defaultMaxTokens: number;
   defaultSystemPrompt: string;
+  learningModeEnabled: boolean;
+  learningModePrevDefaultSystemPrompt: string;
 
   // 功能设置
   enableSound: boolean;