## Why
Codex Desktop repairs sandbox-user read/execute access for binaries
copied to `%LOCALAPPDATA%\OpenAI\Codex\bin`, but Computer Use launches
its bundled Node runtime from `%LOCALAPPDATA%\OpenAI\Codex\runtimes`.
On fresh Windows installations, `CodexSandboxUsers` may therefore be
unable to execute the bundled Node binary. The command runner starts,
but `CreateProcessAsUserW` fails with error 5 (`ACCESS_DENIED`), causing
the Node REPL to exit before Computer Use can discover applications.
This is a follow-up to #21564, which added the original runtime `bin`
ACL repair.
## What changed
- Expand the Codex Desktop runtime ACL roots from only `bin` to both
`bin` and `runtimes`.
- Apply the existing inherited read/execute ACL repair to each runtime
directory when it exists.
- Rename the setup helper to reflect that it now handles multiple
runtime paths.
## Validation
- `cargo fmt -- --check`
- `just test -p codex-windows-sandbox` was run: 113 tests passed and
five environment-dependent legacy execution tests failed because
`CreateRestrictedToken` returned error 87.
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