fix(plex): facet + sort refinements

- Facets now respect the watch-state filter too (In progress / Watched / Unwatched),
  so e.g. the Year bounds match the visible set (was showing the library min, not the
  filtered min).
- Genre chips sorted alphabetically (was by count).
- Sort chips ordered alphabetically by their localized label.
- Ascending/Descending chips swapped (Ascending first) and the default sort direction
  is now Ascending.
- Default sort is now Title (ascending) instead of Recently added / Descending.

frontend/src/lib/api.ts

@@ -1206,13 +1206,15 @@ export const api = {
       if (f.actors?.length) u.set("actors", f.actors.join(","));
       if (f.studios?.length) u.set("studios", f.studios.join(","));
       if (f.collection) u.set("collection", f.collection);
-      if (f.sortDir === "asc") u.set("sort_dir", "asc");
+      u.set("sort_dir", f.sortDir ?? "asc"); // default ascending
     }
     return req(`/api/plex/library?${u.toString()}`);
   },
-  // Facets ADAPT to the active filters (faceted search) — pass them so each group narrows the others.
-  plexFacets: (scope: string, f?: PlexFilters): Promise<PlexFacets> => {
+  // Facets ADAPT to the active filters + watch-state (faceted search) — pass them so each group
+  // narrows the others and the bounds match the visible result set.
+  plexFacets: (scope: string, f?: PlexFilters, show?: string): Promise<PlexFacets> => {
     const u = new URLSearchParams({ scope });
+    if (show && show !== "all") u.set("show", show);
     if (f) {
       if (f.genres?.length) u.set("genres", f.genres.join(","));
       if (f.genreMode === "all") u.set("genre_mode", "all");