Plugins that offer no floating editor (most CLAP plugins on Windows) now
get a host window of SoundCraft's: the GUI is created embedded, parented
to a top-level HWND owned by the app window, sized from get_size, resized
on request_resize (applied by the editor's idle on the main thread, then
set_size), and torn down when the user closes the window. Floating
editors work as before; other platforms still report embedded editors
as unsupported.
Docs: plugin-parity editor rows and the roadmap log.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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