refactor(cli): 判据收敛到 unlucky_cli::cli,banner 按被调用的二进制名自称(M82 复审)
去重:`looks_like_cli(args) -> bool` 落在 `unlucky_cli::cli`,两个 GUI 的 main.rs 只调用它, 判据从两份变一份。cli crate 里**不**出现 GUI 的 flag 表——语义仍是「首个 token 是裸词就接管; 首个 token 是 flag 时只有解析出真命令才接管,解析失败不接管」。原来两个 main.rs 里的 5+5 条 单测合并成 cli crate 的一份(用例集按复审要求原样搬,含 --screenshot/--renderer/--diff/ --mock/--force-state/--scale-factor、--help/-h/--version/-V、10 个已知子命令、--json 前置、 未知子命令),两个 main.rs 的旧测试已删除。 banner:新增 cli::program 模块,从 argv[0] 的 basename 取程序名(剥目录、剥 .exe、空值回落 ull),把帮助/版本/错误提示里独立出现的 `ull` 换成它——`unlucky-launcher --version` 不再自称 `ull`,也不会把人指去敲 `ull --help`。`run()` 签名未改;`ull` 自己跑时输出逐字不变(替换是 恒等),打包脚本的 `ull --version` 冒烟不受影响。
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@@ -82,7 +82,9 @@ Binaries in the workspace, so you can tell them apart:
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`unlucky-launcher` and `ull` are not duplicates. The GUI binary needs the graphics stack when it
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opens a window (it `dlopen`s X11 / Wayland / GL, and links `libfontconfig` at load); `ull` needs
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nothing beyond glibc, so it runs on a server, a CI container or Termux where no window can exist.
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Pick `ull` when there is no desktop, `unlucky-launcher <command>` when there is.
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Pick `ull` when there is no desktop, `unlucky-launcher <command>` when there is. Both print the same
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CLI text and name themselves after the binary you invoked: `unlucky-launcher --help` starts with
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`unlucky-launcher ·`, `ull --help` starts with `ull ·`.
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### Subcommand dispatch
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