Grid tiles now show Steam library artwork when available,
falling back to icon+label for games without cover art.
Cell proportions adjusted to 2:3 for portrait covers.
Search bar filters the library by name. Source tabs filter
by All/Steam/Desktop. Both properties live in C++ so QML
just binds filterString and sourceFilter.
"Continue Playing" row shows the last 5 launched games
with artwork, persisted across sessions via plasmamobilerc.
Remove orphaned GameTile.qml (replaced by inline delegate).
SDL3-backed gamepad manager polls at 60Hz, handles hotplug,
exposes battery/rumble/LED per device. Game launcher aggregates
XDG desktop entries, Steam appmanifests, and Flatpak into a
single sorted model.
Game Center uses the new model instead of folio's search model.
D-pad/A/B/Y navigate and launch. Guide button toggles the
overlay. Battery and controller status shown in the HUD.
