feat: 集成千帆大模型（百度文心一言）支持

- 新增 qianfan 服务商配置（config.js）
- DeepSeekAPI 支持动态 model 和 appId 参数
- 千帆 API 需要额外的 appid header
- 更新所有 API 调用点传递完整配置

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/api/deepseek.js

@@ -4,25 +4,35 @@ class DeepSeekAPI {
   constructor(config) {
     this.baseURL = config.url
     this.apiKey = config.key
-    console.log('DeepSeekAPI 已初始化:', { baseURL: this.baseURL })
+    this.model = config.model || 'deepseek-chat'
+    this.appId = config.appId || ''  // 千帆大模型需要
+    console.log('DeepSeekAPI 已初始化:', { baseURL: this.baseURL, model: this.model })
   }
 
   async _streamRequest(messages, options = {}, onContent) {
-    const authHeader = this.apiKey.trim().startsWith('Bearer ') 
-      ? this.apiKey.trim() 
+    const authHeader = this.apiKey.trim().startsWith('Bearer ')
+      ? this.apiKey.trim()
       : `Bearer ${this.apiKey.trim()}`;
 
+    // 构建 headers
+    const headers = {
+      'Content-Type': 'application/json',
+      'Authorization': authHeader
+    }
+
+    // 千帆大模型需要 appid header
+    if (this.appId) {
+      headers['appid'] = this.appId
+    }
+
     console.log('DeepSeekAPI: Starting stream request...', { messagesLength: messages.length })
 
     try {
       const response = await fetch(this.baseURL, {
         method: 'POST',
-        headers: {
-          'Content-Type': 'application/json',
-          'Authorization': authHeader
-        },
+        headers,
         body: JSON.stringify({
-          model: 'deepseek-chat',
+          model: this.model,
           messages,
           stream: true,
           ...options

src/stores/app.js

@@ -119,7 +119,12 @@ export const useAppStore = defineStore('app', () => {
 
     ref.isAnalyzing = true
     try {
-      const api = new DeepSeekAPI({ url: apiUrl.value, key: apiKey.value })
+      const api = new DeepSeekAPI({
+        url: apiUrl.value,
+        key: apiKey.value,
+        model: currentProvider.value.model,
+        appId: currentProvider.value.appId
+      })
       let fullTags = ''
 
       console.log(`Store: Analyzing style for reference [${index}]...`)
@@ -152,7 +157,12 @@ export const useAppStore = defineStore('app', () => {
     generationStage.value = 'thinking'
 
     try {
-      const api = new DeepSeekAPI({ url: apiUrl.value, key: apiKey.value })
+      const api = new DeepSeekAPI({
+        url: apiUrl.value,
+        key: apiKey.value,
+        model: currentProvider.value.model,
+        appId: currentProvider.value.appId
+      })
       const streamParser = createStreamParser()
 
       // 构建 Prompt（XML 结构化数据）
@@ -332,7 +342,12 @@ ${draft}
     }
 
     try {
-      const api = new DeepSeekAPI({ url: apiUrl.value, key: apiKey.value })
+      const api = new DeepSeekAPI({
+        url: apiUrl.value,
+        key: apiKey.value,
+        model: currentProvider.value.model,
+        appId: currentProvider.value.appId
+      })
       let fullContent = ''
 
       console.log('Store: 调用 API 分析文章...')
@@ -453,7 +468,12 @@ ${draft}
 
   // 通用 API 调用方法
   const callApi = async (prompt, onContent, options = {}) => {
-    const api = new DeepSeekAPI({ url: apiUrl.value, key: apiKey.value })
+    const api = new DeepSeekAPI({
+      url: apiUrl.value,
+      key: apiKey.value,
+      model: currentProvider.value.model,
+      appId: currentProvider.value.appId
+    })
     return api.generateContent(prompt, onContent, options)
   }
 
@@ -645,7 +665,12 @@ ${draft}
     section.generatedContent = ''
 
     try {
-      const api = new DeepSeekAPI({ url: apiUrl.value, key: apiKey.value })
+      const api = new DeepSeekAPI({
+        url: apiUrl.value,
+        key: apiKey.value,
+        model: currentProvider.value.model,
+        appId: currentProvider.value.appId
+      })
       const streamParser = createStreamParser()
 
       // 构建上文内容，保持连贯性

src/utils/config.js

@@ -9,6 +9,15 @@ export const modelProviders = {
     apiKey: import.meta.env.VITE_DEEPSEEK_API_KEY || '',
     model: import.meta.env.VITE_DEEPSEEK_MODEL || 'deepseek-chat'
   },
+  qianfan: {
+    id: 'qianfan',
+    name: '千帆大模型',
+    description: '百度文心一言',
+    apiUrl: import.meta.env.VITE_QIANFAN_API_URL || 'https://qianfan.baidubce.com/v2/chat/completions',
+    apiKey: import.meta.env.VITE_QIANFAN_API_KEY || '',
+    appId: import.meta.env.VITE_QIANFAN_APP_ID || '',
+    model: import.meta.env.VITE_QIANFAN_MODEL || 'ernie-4.0-8k'
+  },
   openai: {
     id: 'openai',
     name: 'OpenAI',