fix(registry): coreutils stat/chmod/ls show real permission bits

[NathanFlurry]

Summary

• Wire WASI Rust coreutils permission display and chmod paths to the existing host_fs mode/chmod imports.
• Keep host chmod changes durable by updating the mapped guest-visible path in the Wasm runner.
• Embed vendored uutils English locale catalogs in the uucore stub and lazily initialize localization so message IDs do not leak in Wasm commands.
• Keep native builds gated away from the WASI-specific code paths.

Validation

• cd registry/native && make cmd/stat cmd/chmod cmd/ls cmd/touch
• just registry-build coreutils
• Fresh vendor apply: cd registry/native && make clean-vendor && make vendor && ./scripts/patch-vendor.sh
• Real just shell tmux proof: stat shows 0644, chmod 600, stat/stat -c show 0600, and ls -l shows -rw-------.
• cd agentos/packages/core && AGENTOS_WASM_SNAPSHOT_RUNNER=off AGENTOS_SIDECAR_BIN=/home/nathan/workspaces/shell/agentos/target/debug/agentos-sidecar pnpm exec vitest run tests/fs-native-parity.test.ts tests/vim-render.test.ts

[railway-app]

🚅 Deployed to the secure-exec-pr-266 environment in secure-exec

Service	Status	Web	Updated (UTC)
secure-exec	😴 Sleeping (View Logs)	Web	Jul 4, 2026 at 4:08 am