fix(ui): nothing past the right edge of a phone

The Feed's chips + Sort + View row did not fit one line at 375px and pushed
the page 21px wide; the toast stack capped its width by the viewport while
it sits right of the sidebar. The toolbar rows (Feed, Plex browse) wrap,
and the toasts are capped by their host.

frontend/src/components/PlexBrowse.tsx

@@ -518,7 +518,7 @@ export default function PlexBrowse() {
           {/* The controls row sits directly above the grid: the applied-filter chips flow from the
               left (overflowing to a "+N"/count pill so they never crowd the controls), while Sort +
               the Discover/Browse toggle stay pinned to the right — the same layout as the Feed. */}
-          <div className="mt-1 flex items-center gap-2">
+          <div className="mt-1 flex flex-wrap items-center gap-2">
             {/* The active personal view (if any) leads the applied-filter row, like the feed. */}
             <SelectedViewChip />
             <ActiveFilterChips