fix(plex): the show and season restart names its object and starts at 0 (E28 S3f2)

The header button said only "Play from start" and resumed the first
episode at its saved point. It now reads "Season from the start · S6 · E1"
or "Show from the start · S1 · E1" and asks the player for 0.

frontend/src/components/plexViews.tsx

@@ -328,7 +328,7 @@ export function PlexShowView({
 }: {
   showId: string;
   onBack: () => void;
-  onPlay: (epRk: string, queue: string[]) => void;
+  onPlay: (epRk: string, queue: string[], fromStart?: boolean) => void;
   onOpenSeason: (seasonId: string) => void;
   onOpenShow: (id: string) => void;
   onFilter?: (patch: Partial<PlexFilters>) => void;
@@ -559,9 +559,10 @@ export function PlexShowView({
               )}
               {show.first && show.status !== "new" && (
                 <ActionBtn
-                  onClick={() => onPlay(show.first!.id, allKeys)}
+                  onClick={() => onPlay(show.first!.id, allKeys, true)}
                   icon={RotateCcw}
-                  label={t("plex.series.playFromStart")}
+                  label={t("plex.series.showFromStart")}
+                  sub={epLabel(show.first)}
                 />
               )}
               <WatchedToggle
@@ -765,9 +766,10 @@ export function PlexSeasonView({
               )}
               {se.first && se.status !== "new" && (
                 <ActionBtn
-                  onClick={() => onPlay(se.first!.id, allKeys)}
+                  onClick={() => onPlay(se.first!.id, allKeys, true)}
                   icon={RotateCcw}
-                  label={t("plex.series.playFromStart")}
+                  label={t("plex.series.seasonFromStart")}
+                  sub={epLabel(se.first)}
                 />
               )}
               <WatchedToggle