Remove overflow property from .icon-rounded (not valid in GTK CSS).
Remove prefers-reduced-motion media query (not supported by GTK CSS
engine - reduced motion is handled by gtk-enable-animations setting).
Unparent PopoverMenu on widget destroy to prevent finalization warnings
when library view refreshes.
Card view: 200px cards with 72px icons, .title-3 names, version+size
combined line, single priority badge, libadwaita .card class replacing
custom .app-card CSS.
List view: 48px rounded icons, .rich-list class, structured two-line
subtitle (description + version/size), single priority badge.
Detail view: restructured into ViewStack/ViewSwitcher with 4 tabs
(Overview, System, Security, Storage). 96px hero banner with gradient
background. Rows distributed logically across tabs.
Context menu: right-click (GestureClick button 3) and long-press on
cards and list rows. Menu items: Launch, Check for Updates, Scan for
Vulnerabilities, Integrate/Remove Integration, Open Containing Folder,
Copy Path. All backed by parameterized window actions.
CSS: removed custom .app-card rules (replaced by .card), added
.icon-rounded for list icons, .detail-banner gradient, and
.detail-view-switcher positioning.
