feat: 添加角色设定预留API 设定页(#768)

* add systemMessage

* perf: 优化代码和类型

* perf: 补全翻译和为以后做准备

---------

Co-authored-by: ChenZhaoYu <790348264@qq.com>

service/src/types.ts

@@ -1,5 +1,11 @@
 import type { FetchFn } from 'chatgpt'
 
+export interface RequestProps {
+  prompt: string
+  options?: ChatContext
+  systemMessage: string
+}
+
 export interface ChatContext {
   conversationId?: string
   parentMessageId?: string