- sherpa-runtime-env: use case-insensitive key lookup when modifying PATH
on plain env objects. On Windows, `{...process.env}` stores PATH as
`Path` but `applySherpaLoaderEnv` used hardcoded `"PATH"`, creating a
duplicate key that could shadow the real system PATH in child processes.
- runtime-toolchain: use `wmic` on Windows instead of Unix-only `ps -o`
to resolve the node executable path from a PID.
- claude-agent: pass `findExecutable("claude")` as
`pathToClaudeCodeExecutable` so the SDK uses the user's installed
binary when available. Update spawn hook to only replace bare
"node"/"bun" with process.execPath, preserving native binary paths.
- desktop/paseo.cmd: use ELECTRON_RUN_AS_NODE with node-entrypoint-runner
for the Windows CLI wrapper.
