[Feature] Please provide `bsk daemon install-autostart` (and document the 10-minute idle exit)

[zczsw123]

Request

Please provide bsk daemon install-autostart / bsk daemon uninstall-autostart.

Why

The daemonize-mode error message recommends running the daemon "in a persistent host task". That is the right shape — but creating such a task is not possible from an agent / sandboxed environment, so every user has to invent their own launcher. We ended up writing a VBS launcher and reverse-engineering the constraints; that shouldn't be necessary.

What fails from an agent environment

Approach	Result
Start-Process <bsk> daemon start	daemon may appear, then is killed together with the spawning command (see #268 — fixed in 0.3.1, which we confirm improves this)
schtasks /create /tn ... /sc onlogon	ERROR: Unspecified error
Register-ScheduledTask ...	Unspecified error

What works today (user-side only, found by trial and error)

A silent launcher in the Startup folder. Two non-obvious requirements:

1. it must use --foreground (the default daemonize mode fails on this host — see Windows: bsk daemon start auto-detached process exits immediately, extension cannot connect #218),
2. the file must be pure ASCII — VBScript reads ANSI, and a UTF-8 file fails with a misleading unterminated string constant / object required error that points nowhere near the real cause.

' bsk daemon autostart (silent, at logon)
Set sh = CreateObject("WScript.Shell")
sh.Run """C:\Users\<user>\.local\bin\bsk.exe"" daemon start --foreground", 0, False

This works because explorer.exe spawns it, outside restricted job objects.

Also please document

• Idle exit: daemon exceeded idle threshold; exiting idle_secs:600. Note the timer starts after the browser disconnects (with Edge connected we observed >44 min uptime). The practical rule a user needs is: "Edge open ⇒ the daemon should be up" — it is not a start-once-forever service, and after Edge has been closed for ~10 minutes the daemon is gone and must be relaunched.
• If autostart is out of scope for now, publishing the recommended launcher snippet and the ASCII caveat in the README would save every user the same rediscovery.

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中文摘要

请提供 bsk daemon install-autostart。报错里推荐的"persistent host task"在 agent/沙箱环境里建不了（schtasks、Register-ScheduledTask 均报 Unspecified error），只能由用户在启动文件夹放 VBS（必须 --foreground，且必须纯 ASCII，否则报"未结束的字符串常量"这种指不到真因的错误）。另外请把空闲 10 分钟自动退出写进文档——计时是从"浏览器断开"之后开始的，用户需要知道"Edge 开着，daemon 就该在"，它不是一次性常驻服务。