feat: 新增版本管理系统，重构 /health → /api/meta

src/shared/api.ts

@@ -3,10 +3,11 @@ export interface ApiErrorResponse {
   status: number;
 }
 
-export interface HealthResponse {
+export interface MetaResponse {
   ok: true;
   service: string;
   timestamp: string;
+  version: string;
 }
 
 export type RuntimeMode = "development" | "production" | "test";