feat: 完成模拟交易闭环、App 与 A 股行情接入

统一单入口 Go 工程与前端依赖目录，增加后台供应商配置、候选审核、计划预算、成交冲正、持仓复盘和站内通知。接入策略版本、Python 回测、可配置 A 股公开行情及 zap 文件轮转日志，补充迁移、契约与验证。

apps/mobile/src/state/accounts.ts

@@ -0,0 +1,11 @@
+import {useQuery,useQueryClient} from "@tanstack/react-query"
+import {useSession} from "./session"
+import {useAccountSelection} from "./account"
+import type {Account} from "../lib/types"
+export function useAccounts(){
+ const {session,client}=useSession();const selectedID=useAccountSelection(state=>state.accountID)
+ const query=useQuery({queryKey:["accounts",session?.user.id],enabled:!!session,queryFn:({signal})=>client<Account[]>("/api/v1/accounts",{signal})})
+ const accounts=query.data??[];const selected=accounts.find(account=>account.id===selectedID)??accounts[0]??null
+ return {...query,accounts,selected}
+}
+export function useSwitchAccount(){const queryClient=useQueryClient();return async(id:string)=>{await queryClient.cancelQueries();queryClient.removeQueries({predicate:query=>query.queryKey[0]!=="accounts"});useAccountSelection.getState().select(id)}}