df74d702af
Backdrop display:block isn't media-scoped in fp_portal_sidebar.scss (intentional — JS owns the drawer lifecycle). Without a resize listener, opening the drawer at <=768px and resizing the browser to >768px leaves the semi-opaque backdrop visible on desktop while the sidebar visually snaps back to its sticky rail. Resize handler calls toggleOpen(false) when crossing the breakpoint with .o_fp_open still set. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>