[BUG] Windows - legacy binary cleanup never runs (platform === 'win32' is always false)

[mynameistito]

In the postinstall script (apps/cli/src/build.ts), platform is mapped through platformMap to "windows", but the legacy binary path check compares against "win32":

const platformMap = { darwin: "darwin", linux: "linux", win32: "windows" };
const platform = platformMap[os.platform()]; // "windows" on Windows
const legacyCachedBinary = path.join(binDir, platform === "win32" ? ".executor.exe" : ".executor");
//                                                      ^^^^^^^^^^ always false

On Windows this always resolves to .executor instead of .executor.exe, so the old binary never gets cleaned up.

Fix: change the comparison to platform === "windows".

Fixed in: apps/cli/src/build.ts

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