[Sorte1]

Adds a cleanup pass, fold-pure-calls, that evaluates calls like dec(2) to small pure helpers such as let dec = (a) => ["hello", "log"][a] when every argument is a literal, and removes the helper once nothing uses it. Nothing from the input is run: the body is checked and evaluated over a small pure subset (literals, parameters, operators on primitives, ternaries, templates, and own-element reads of literal arrays, objects, strings and never-written constants).

Calls that could run before a let/const they depend on, helpers that are written, impure or read free names, out-of-range reads and arrays that escape are all left alone, in both lanes. The safe lane also requires the helper to be called only directly; the unsafe lane folds a helper passed around as a value. The rules are written up in docs/known-divergences/deobfuscate.md, and fixtures/pure-calls covers both the folded shapes and the near misses against node.

This also touches web/src/settings/passes.json, since the pass table test keeps it in sync.

[github-actions]

Preview: https://6d8607b7.untwist-d8y.pages.dev

Branch link: https://feat-fold-pure-calls.untwist-d8y.pages.dev
Commit: 94715eb