The Amiibo tab's folder field took no typing: the menu never passes typed characters to Dear ImGui, so "Open" only
re-read "./amiibo". A missing folder said so at the bottom of the right pane, below its scroll.
"Open" now shows the shell's folder dialog on Windows (IFileOpenDialog on a thread of its own, owned by the game
window) and SDL_ShowOpenFolderDialog on the SDL window thread elsewhere; the tab shows the folder as text and names a
missing one inside the empty list.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
