1. [correctness] [apps/rust/static/app.js:32](/home/paulca/amadan.net/carlos/todomvc-bakeoff/.worktrees/rust/apps/rust/static/app.js:32): Every action response replaces the entire list, discarding edits started while the request was pending. With a delayed response, toggle one todo, then edit another: when the toggle response arrives, the edit disappears without saving. Preserve the active edit and its draft across updates.
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2. [spec] [apps/rust/Makefile:33](/home/paulca/amadan.net/carlos/todomvc-bakeoff/.worktrees/rust/apps/rust/Makefile:33): `clean-deps` removes Cargo’s target directory but leaves Zig’s compiled libraries in its shared cache. `build-arm64` uses `cargo zigbuild` without configuring an app-local Zig cache, so subsequent cold builds can reuse compiled dependencies. Put Zig’s compiled cache under this app’s `.cache/` and remove it in `clean-deps`.
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