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后端: PortfolioBacktestRequest.strategy → submit_portfolio(strategy=) → spec → portfolio_worker _build_argv --strategy(NAS local + Mac SSH 两分支) 前端: PortfolioBacktestReq.strategy? + 策略下拉(4选项) + 副标题动态 + onSubmit 透传 runner_backtest CLI 已支持 --strategy(choices 4 策略),本提交不动