feat(shells): expose self' (raw-scan view) in evalContext - #2
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Add a system-resolved raw-scan view of the project's own packages/apps/checks to evalContext, so shells/*.nix can consume them via self'.packages / .apps / .checks without infinite recursion. The view is built from loadScopedOutputs (the same intermediate used to assemble final flake outputs), keeping the dependency graph a DAG — unlike flake-parts' self', which points to the final outputs and relies on lazy evaluation to break the cycle.
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See forgejo PR: https://git.lambda.lc/lc-studio/flake-fhs/pulls/3
任务意图
在
evalContext中暴露self'字段（system-resolved raw-scan view），让shells/*.nix等用户代码可以方便地引用本 flake 自身的 packages/apps/checks derivation，且不会造成无限递归。核心设计（路线 2：原始扫描视图）
self'.packages/.apps/.checks直接来自loadScopedOutputs的原始扫描结果self'结构性更强改动
lib/fhs-core.nix:mkEvalContext新增baseCtx和self'字段；allProjectDrvs重构为复用self'checks/self-prime.nix: 新增测试，验证self'在 devShell 中可用且不死锁AGENTS.md: 新增 "self': Project-Internal Outputs View" 章节验证
just checkexit 0，4/4 模板通过，17 checks 全绿just lint无死代码、无反模式