feat(aihr): switch interview and case flows to real-model-first pipeline

AI 面试 /start 动态出题、/finish 按真实回答结构化评分(未配模型用本地
Rubric 估分);案例沉淀 /upload 改 multipart 真实语音+ASR 转写,
/organize 用真实 transcript 调 chat 模型整理;seed service 重构为
AihrInterviewService/AihrCaseService;前端面试/案例/对练页与移动端、
demo-check、验收文档同步真实链路口径。

frontend/src/api/aihr/interview.ts

@@ -27,6 +27,7 @@ export type InterviewStartResponse = {
   candidateName: string;
   positionCode: string;
   questions: InterviewQuestionResponse[];
+  source: string;
 };
 
 export type InterviewAnswerRequest = {
@@ -44,6 +45,7 @@ export type InterviewAnswerResponse = {
 
 export type InterviewFinishRequest = {
   sessionId: string;
+  answers: Record<string, string>;
 };
 
 export type InterviewFinishResponse = {
@@ -65,6 +67,7 @@ export type InterviewFinishResponse = {
     result: string;
     summary: string;
   }>;
+  source: string;
 };
 
 export function startInterview(data: InterviewStartRequest): Promise<ApiResult<InterviewStartResponse>> {