build(zcash-wasm): cargo aliases + indexmap/std shim#4
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- Add cargo aliases in .cargo/config.toml: `wasm-parallel` (needs +nightly) and `wasm-single` so the parallel zcash-wasm build recipe isn't opaque folklore. Consumers run `cargo +nightly wasm-parallel` to produce the .wasm. - Force indexmap/std feature in zafu-wasm's Cargo.toml — newer nightlies don't set indexmap's `has_std` cfg under `-Z build-std`, so halo2_proofs's `IndexMap::new()` won't compile. Build-time unification only, no runtime effect. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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wasm-parallel(needs +nightly) andwasm-singleso the parallel zcash-wasm build recipe isn't opaque folklore. Consumers runcargo +nightly wasm-parallelto produce the .wasm.has_stdcfg under-Z build-std, so halo2_proofs'sIndexMap::new()won't compile. Build-time unification only, no runtime effect.