feat: 添加语言参数支持以处理多语言场景

在播客生成流程中添加 lang 参数，用于支持多语言场景。修改包括：
- 在请求接口中添加 lang 字段
- 在 API 调用中传递 lang 参数
- 在服务端处理中接收并使用 lang 参数
- 简化客户端请求参数结构

server/main.py

@@ -212,6 +212,7 @@ async def _generate_podcast_task(
     callback_url: Optional[str] = None, # 新增回调地址参数
     output_language: Optional[str] = None,
     usetime: Optional[str] = None,
+    lang: Optional[str] = None,
 ):
     task_results[auth_id][task_id]["status"] = TaskStatus.RUNNING
     try:
@@ -266,6 +267,7 @@ async def _generate_podcast_task(
                 "timestamp": int(time.time()), 
                 "status": task_results[auth_id][task_id]["status"],
                 "usetime": usetime,
+                "lang": lang,
             }
             
             MAX_RETRIES = 3 # 定义最大重试次数
@@ -307,6 +309,7 @@ async def generate_podcast_submission(
     callback_url: Optional[str] = Form(None),
     output_language: Optional[str] = Form(None),
     usetime: Optional[str] = Form(None),
+    lang: Optional[str] = Form(None),
 ):
     # 1. 验证 tts_provider
     if tts_provider not in tts_provider_map:
@@ -327,7 +330,6 @@ async def generate_podcast_submission(
         "timestamp": time.time(),
         "callback_url": callback_url, # 存储回调地址
         "auth_id": auth_id, # 存储 auth_id
-        "usetime": usetime,
     }
 
     background_tasks.add_task(
@@ -344,7 +346,8 @@ async def generate_podcast_submission(
         tts_provider,
         callback_url,
         output_language,
-        usetime
+        usetime,
+        lang,
     )
 
     return {"message": "Podcast generation started.", "task_id": task_id}

web/src/app/api/points/route.ts

@@ -30,8 +30,7 @@ export async function GET(request: NextRequest) { // GET 函数接收 request
 }
 
 export async function PUT(request: NextRequest) {
-  const { task_id, auth_id, timestamp, status, usetime } = await request.json();
-  const lang = getLanguageFromRequest(request); // 获取语言
+  const { task_id, auth_id, timestamp, status, usetime, lang } = await request.json();
   const { t } = await getTranslation(lang, 'errors'); // 初始化翻译
   try {
     if(status !== 'completed') {

web/src/lib/podcastApi.ts

@@ -10,7 +10,7 @@ const API_BASE_URL = process.env.NEXT_PUBLIC_PODCAST_API_BASE_URL || 'http://192
  * 启动播客生成任务
  */
 export async function startPodcastGenerationTask(body: PodcastGenerationRequest, userId: string, lang: string): Promise<ApiResponse<PodcastGenerationResponse>> {
-
+  body.lang = lang;
   try {
     const response = await fetch(`${API_BASE_URL}/generate-podcast`, {
       method: 'POST',

web/src/types/index.ts

@@ -10,6 +10,7 @@ export interface PodcastGenerationRequest {
   callback_url?: string; // 固定值
   usetime?: string; // 时长 来自选择
   output_language?: string; // 语言 来自设置
+  lang?: string; // 子路径表示语言
 }
 
 export interface PodcastGenerationResponse {