Run bare, the non-bundled binary shows in the Dock as the raw
`openpencil-desktop` executable name with a blank icon — no
`Info.plist` to read `CFBundleName` / the icon from.
New `macos_app::apply()` sets both at startup via objc2:
`NSProcessInfo::setProcessName` for the Dock / menu-bar name and
`NSApplication::setApplicationIconImage` (from an embedded
`assets/icon.png`) for the Dock tile. `[package.metadata.bundle]`
also gains `icon`, so a packaged `.app` carries it natively.
objc2-app-kit / -foundation are pinned to the 0.2 line winit /
casement already lock.
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