Every message this app ever showed the client - the host-handoff
notice, every "couldn't start/join a party" error - went through a
blocking alert(), freezing the tab for what's usually just a heads-up.
New toast.ts is a self-mounting singleton (no per-party state, so it
doesn't need Shell.ts wiring like musicBar/MusicBar does) styled after
Player.css's own .requestBanner, with an 'error' variant that's still
just a plain left accent, not a red banner - even a failed click
doesn't need this app to suddenly shout. All ten alert() call sites
across Player/MusicBar/tiles/Home/Series/Playlist/Artist/Album now go
through it.
Also fixes a real reported bug while in the area: the library/artist
grid's minmax(160px, 1fr) floor left no room for a second column once
a real phone's padding was subtracted, unlike everything else mobile
in this app (the sidebar, the music bar) which already got a
narrow-screen treatment. Switched to a fluid clamp(100px, 28vw, 160px)
floor instead of a fixed breakpoint, confirmed at seven real widths via
an iframe (its own independent viewport for vw units, sidestepping
this sandbox's own unreliable viewport-resize emulation).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
