feat(plex): sort direction, genre any/all, multi-person filters; fix back-nav + player stop

UAT follow-ups on the Plex filter epic:
- Sort now has an asc/desc toggle (sort_dir), applied to any sort field.
- Genre multi-select gains an Any/All mode (genre_mode: OR vs AND containment).
- Director/actor/studio become multi-value: people AND (titles featuring all selected),
  studios OR; clicking them on the info page stacks (unions) instead of replacing, and
  the sidebar shows each as a removable 'Active' chip.
- fix(history): clicking a metadata filter on the info page now pushes a fresh grid
  entry instead of history.back(), so browser Back returns to the info page rather than
  leaving the Plex module.
- fix(player): fully tear down the <video> + hls on unmount and guard late play() calls,
  so backing out of a just-started video no longer leaves audio playing in the background.
i18n en/hu/de (match any/all, sort direction).

backend/app/routes/plex.py

@@ -193,6 +193,7 @@ def browse(
     offset: int = 0,
     limit: int = Query(default=40, ge=1, le=100),
     genres: str | None = None,
+    genre_mode: str = "any",
     content_ratings: str | None = None,
     year_min: int | None = None,
     year_max: int | None = None,
@@ -200,9 +201,10 @@ def browse(
     duration_min: int | None = None,
     duration_max: int | None = None,
     added_within: str | None = None,
-    director: str | None = None,
-    actor: str | None = None,
-    studio: str | None = None,
+    directors: str | None = None,
+    actors: str | None = None,
+    studios: str | None = None,
+    sort_dir: str = "desc",
     user: User = Depends(current_user),
     db: Session = Depends(get_db),
 ) -> dict:
@@ -230,9 +232,10 @@ def browse(
         else:  # all — hide only the explicitly hidden
             query = query.filter(or_(st.status.is_(None), st.status != "hidden"))
         # --- Metadata filters (movie libraries; @> containment is GIN-indexed) ---
-        genre_any = _csv(genres)
-        if genre_any:
-            query = query.filter(or_(*[PlexItem.genres.contains([g]) for g in genre_any]))
+        gsel = _csv(genres)
+        if gsel:
+            conds = [PlexItem.genres.contains([g]) for g in gsel]
+            query = query.filter(and_(*conds) if genre_mode == "all" else or_(*conds))
         crs = _csv(content_ratings)
         if crs:
             query = query.filter(PlexItem.content_rating.in_(crs))
@@ -249,12 +252,13 @@ def browse(
         cutoff = _added_cutoff(added_within)
         if cutoff is not None:
             query = query.filter(PlexItem.added_at >= cutoff)
-        if director:
-            query = query.filter(PlexItem.directors.contains([director]))
-        if actor:
-            query = query.filter(PlexItem.cast_names.contains([actor]))
-        if studio:
-            query = query.filter(PlexItem.studio == studio)
+        for d in _csv(directors):  # AND — titles this whole set directed
+            query = query.filter(PlexItem.directors.contains([d]))
+        for a in _csv(actors):  # AND — titles featuring all these people
+            query = query.filter(PlexItem.cast_names.contains([a]))
+        stds = _csv(studios)
+        if stds:  # OR — a title has one studio
+            query = query.filter(PlexItem.studio.in_(stds))
     else:
         query = query.filter(PlexShow.library_id == lib.id)
 
@@ -268,18 +272,21 @@ def browse(
 
     if tsq is not None:
         order = [func.ts_rank(model.search_vector, tsq).desc()]
-    elif sort == "title":
-        order = [func.lower(model.title).asc()]
-    elif sort == "year" and model is PlexItem:
-        order = [PlexItem.year.desc().nullslast()]
-    elif sort == "rating" and model is PlexItem:
-        order = [PlexItem.rating.desc().nullslast()]
-    elif sort == "duration" and model is PlexItem:
-        order = [PlexItem.duration_s.desc().nullslast()]
-    elif sort == "release" and model is PlexItem:
-        order = [PlexItem.originally_available_at.desc().nullslast()]
-    else:  # added — newest first
-        order = [model.added_at.desc().nullslast()]
+    else:
+        if sort == "title":
+            col = func.lower(model.title)
+        elif sort == "year" and model is PlexItem:
+            col = PlexItem.year
+        elif sort == "rating" and model is PlexItem:
+            col = PlexItem.rating
+        elif sort == "duration" and model is PlexItem:
+            col = PlexItem.duration_s
+        elif sort == "release" and model is PlexItem:
+            col = PlexItem.originally_available_at
+        else:  # added
+            col = model.added_at
+        asc = sort_dir == "asc"
+        order = [(col.asc() if asc else col.desc()).nullslast()]
     order.append(model.id.desc())
 
     rows = query.order_by(*order).offset(offset).limit(limit).all()