docs: update /api/welcome to /api/session in README

Replace the obsolete welcome endpoint documentation with the
session endpoint which is the critical one for frontend authentication.

Author: liut

README.md

@@ -37,20 +37,24 @@ AI chat backend with knowledge base Q&A, MCP tools, and OAuth authentication.
 
 ## APIs
 
-### Get welcome message and new conversation ID
+### Get session information
 
 <details>
- <summary><code>GET</code> <code><b>/api/welcome</b></code></summary>
+ <summary><code>GET</code> <code><b>/api/session</b></code></summary>
 
 ##### Parameters
 
 > None
 
+##### Description
+
+> Returns current login status and user info. If not logged in and `auth` is true, redirect to the URI in `data.uri` for OAuth login.
+
 ##### Responses
 
 > | http code     | content-type                      | response                                           |
 > |---------------|-----------------------------------|---------------------------------------------------------------------|
-> | `200`         | `application/json`        | `{"message": "welcome message", "id": "new-cid"}`                                         |
+> | `200`         | `application/json`        | `{"status":"Success","data":{"auth":false,"user":{...}}}`                                    |
 
 
 </details>

README_CN.md

@@ -37,20 +37,24 @@ AI 聊天后端，集知识库问答、MCP 工具与 OAuth 认证于一体。
 
 ## API 接口
 
-### 获取欢迎消息和新会话 ID
+### 获取会话信息
 
 <details>
- <summary><code>GET</code> <code><b>/api/welcome</b></code></summary>
+ <summary><code>GET</code> <code><b>/api/session</b></code></summary>
 
 ##### 参数
 
 > 无
 
+##### 说明
+
+> 返回当前登录状态和用户信息。若未登录且 `auth` 为 true，前端应跳转到 `data.uri` 进行 OAuth 登录。
+
 ##### 响应
 
 > | http 状态码 | content-type                      | 响应                                           |
 > |---------------|-----------------------------------|---------------------------------------------------------------------|
-> | `200`         | `application/json`        | `{"message": "welcome message", "id": "new-cid"}`                                         |
+> | `200`         | `application/json`        | `{"status":"Success","data":{"auth":false,"user":{...}}}`                                    |
 
 
 </details>

data/preset.example.yaml

@@ -28,7 +28,7 @@ tools:
 channels:
   # WeCom WebSocket 长连接模式
   wecom:
-    enable: true
+    enable: false
     mode: websocket
     config:
       bot_id: "YOUR_BOT_ID"