fix(e5): deep-review round — combobox Enter, parse_person collision, enrich hardening + coverage

Full-epic /deep-review (11 finders + 12 adversarial verifiers) surfaced no HIGH; every
mechanism finding calibrated to LOW on verification. Fix all 13:

Correctness / reliability:
- Combobox: Enter now commits the VISUALLY highlighted row (highlightIndex ?? activeIndex),
  not the bare keyboard activeIndex — so arrow-then-hover-then-Enter no longer toggles a
  different option than the one painted, and hover-with-no-arrow is no longer a silent no-op.
- parse_person: dedup the known_for pool by (id, media_type), not the bare id — TMDB movie
  and tv id spaces are independent, so a same-id movie+show pair is two distinct credits
  (matches the collision-safe key the rest of the module already uses).
- person-enrich: a per-person in-flight + 60s cooldown guard (people._should_schedule_enrich)
  dedups concurrent opens and rate-limits re-triggering while TMDB is degraded (a transient
  TmdbError leaves the watermark NULL), so bursts can't pile 8s tasks onto the shared threadpool.
- PlexInfo compact()/money(): format with i18n.language (keeping currency USD) instead of a
  hardcoded en/en-US, matching the app's Intl convention.
- delete the dead `plex.filter.add` i18n key (both locales) — the +Add button that used it is gone.

Reuse:
- _continue_watching reuses rollup.agg_subquery(include_resumed=True) + query.apply_show_state_filter
  instead of a third hand-inlined copy of the per-show rollup + in_progress predicate, so the
  Discover rail can't drift from the grid's definition.

Test coverage (the gaps a regression would ship through):
- resolve_library_guids scope-exclusion (a credit in a non-scoped/disabled library is dropped)
  + the []-vs-None distinction; parse_person cross-media-id retention; enrich_person transient
  (NULL watermark) and 404 (stamp) branches; _enrich_person_bg body (fresh session close/rollback,
  None-guard) + the cooldown dedup; continue_watching fully-watched-show exclusion; Combobox
  Enter-commits-highlighted + async/controlled-query mode; PopoverItem aria-checked contract;
  RatingsRow missing-IMDb + imdb==audience branches.

Backend lane 413→420, FE vitest 351→357; all gates green. No migration.

backend/app/plex/rollup.py

@@ -42,27 +42,32 @@ def rollup(cards: list[dict]) -> dict:
     }
 
 
-def agg_subquery(db: Session, user_id: int):
+def agg_subquery(db: Session, user_id: int, include_resumed: bool = False):
     """Per-show episode counts for a user: total, watched, in-progress. Reused to (a) filter the show
-    grid by aggregate watch-state and (b) compute each card's badge."""
+    grid by aggregate watch-state, (b) compute each card's badge, and (c) drive the Discover
+    continue-watching rail. `include_resumed` adds `resumed_at` = max(progress_updated_at) across the
+    show's episodes, so the rail can order shows by how recently they were last progressed."""
     ps = aliased(PlexState)
-    return (
-        select(
-            PlexItem.show_id.label("show_id"),
-            func.count(PlexItem.id).label("total"),
-            func.count(case((ps.status == "watched", 1))).label("watched"),
-            func.count(
-                case(
-                    (
-                        and_(
-                            ps.position_seconds > 0,
-                            or_(ps.status.is_(None), ps.status != "watched"),
-                        ),
-                        1,
-                    )
+    cols = [
+        PlexItem.show_id.label("show_id"),
+        func.count(PlexItem.id).label("total"),
+        func.count(case((ps.status == "watched", 1))).label("watched"),
+        func.count(
+            case(
+                (
+                    and_(
+                        ps.position_seconds > 0,
+                        or_(ps.status.is_(None), ps.status != "watched"),
+                    ),
+                    1,
                 )
-            ).label("inprog"),
-        )
+            )
+        ).label("inprog"),
+    ]
+    if include_resumed:
+        cols.append(func.max(ps.progress_updated_at).label("resumed_at"))
+    return (
+        select(*cols)
         .outerjoin(ps, and_(ps.item_id == PlexItem.id, ps.user_id == user_id))
         .where(PlexItem.kind == "episode", PlexItem.show_id.isnot(None))
         .group_by(PlexItem.show_id)

backend/app/plex/tmdb.py

@@ -434,13 +434,16 @@ def parse_person(payload: dict) -> dict:
     """TMDB /person/{id} (+combined_credits) → the persisted bio fields. `known_for` = the person's
     most-popular movie/tv credits (deduped by id), top `_KNOWN_FOR_MAX`, resolved to library later."""
     credits = (payload.get("combined_credits") or {}).get("cast") or []
-    seen: set[int] = set()
+    # Dedup on (id, media_type), not the bare id: TMDB movie ids and tv ids are independent sequences
+    # (id 603 can be both a movie and a show — see resolve_library_guids), so a same-id movie+show pair
+    # is two distinct credits and both must survive.
+    seen: set[tuple[int, str]] = set()
     known: list[dict] = []
     for c in sorted(credits, key=lambda c: c.get("popularity") or 0, reverse=True):
         tid, mt = c.get("id"), c.get("media_type")
-        if not tid or mt not in ("movie", "tv") or tid in seen:
+        if not tid or mt not in ("movie", "tv") or (tid, mt) in seen:
             continue
-        seen.add(tid)
+        seen.add((tid, mt))
         known.append({"tmdb_id": tid, "media_type": mt, "title": c.get("title") or c.get("name")})
         if len(known) >= _KNOWN_FOR_MAX:
             break

backend/app/routes/plex/discover.py

@@ -10,15 +10,15 @@ card paths); the HU overlay coalesces only in the main grid.
 """
 
 from fastapi import APIRouter, Depends, Query
-from sqlalchemy import and_, case, func, or_, select
-from sqlalchemy.orm import Session, aliased
+from sqlalchemy import and_, func, or_, select
+from sqlalchemy.orm import Session
 
 from app.auth import current_user
 from app.db import get_db
 from app.models import PlexItem, PlexShow, PlexState, User
 from app.plex import rollup
 from app.plex.cards import movie_card, show_card
-from app.plex.query import genres_col
+from app.plex.query import apply_show_state_filter, genres_col
 from app.plex.tmdb import resolve_recs
 from app.routes.plex._shared import _content_libs, _norm_lang
 
@@ -123,39 +123,19 @@ def _continue_watching(
             rows.append((st.progress_updated_at, movie_card(it, st)))
 
     if show_ids:
-        ps = aliased(PlexState)
-        prog = (
-            select(
-                PlexItem.show_id.label("show_id"),
-                func.max(ps.progress_updated_at).label("resumed_at"),
-                func.count(PlexItem.id).label("total"),
-                func.count(case((ps.status == "watched", 1))).label("watched"),
-                func.count(
-                    case(
-                        (
-                            and_(
-                                ps.position_seconds > 0,
-                                or_(ps.status.is_(None), ps.status != "watched"),
-                            ),
-                            1,
-                        )
-                    )
-                ).label("inprog"),
-            )
-            .outerjoin(ps, and_(ps.item_id == PlexItem.id, ps.user_id == uid))
-            .where(PlexItem.kind == "episode", PlexItem.show_id.isnot(None))
-            .group_by(PlexItem.show_id)
-            .subquery()
-        )
-        # in-progress == started but not fully watched (mirrors apply_show_state_filter's `in_progress`).
+        # Reuse the shared per-show episode rollup (total/watched/inprog) rather than re-inlining it, plus
+        # its `resumed_at` = max(progress_updated_at); the in-progress predicate comes from the same shared
+        # `apply_show_state_filter` the grid uses, so the rail can't drift from the grid's definition.
+        prog = rollup.agg_subquery(db, uid, include_resumed=True).subquery()
         srows = db.execute(
-            select(PlexShow, prog.c.resumed_at)
-            .join(prog, prog.c.show_id == PlexShow.id)
-            .where(
-                PlexShow.library_id.in_(show_ids),
-                or_(prog.c.watched > 0, prog.c.inprog > 0),
-                prog.c.watched < prog.c.total,
+            apply_show_state_filter(
+                select(PlexShow, prog.c.resumed_at).join(prog, prog.c.show_id == PlexShow.id),
+                prog.c.total,
+                prog.c.watched,
+                prog.c.inprog,
+                "in_progress",
             )
+            .where(PlexShow.library_id.in_(show_ids))
             .order_by(prog.c.resumed_at.desc().nullslast())
             .limit(RAIL_LIMIT)
         ).all()

backend/app/routes/plex/people.py

@@ -1,6 +1,8 @@
 """Plex people: cast/crew filter-chip cards + a single person's filmography page."""
 
 import logging
+import threading
+import time
 
 from fastapi import APIRouter, BackgroundTasks, Depends
 from sqlalchemy import func, or_, select
@@ -112,6 +114,32 @@ def people_cards(
 _PERSON_SECTION_MAX = 200
 
 
+# A person's bio is enriched at most once per this window: it dedups concurrent opens of the same person
+# (each would otherwise schedule its own 8s TMDB task) AND rate-limits re-triggering when TMDB is
+# down/slow (a transient failure leaves tmdb_enriched_at NULL, so without this every reload would spawn a
+# fresh task and pile up on the shared threadpool). In-process + best-effort: a restart just clears it, at
+# worst costing a few extra fetches. A successful enrich stamps the watermark, so the reservation only
+# ever expires harmlessly.
+_ENRICH_COOLDOWN_S = 60.0
+_enrich_inflight: dict[int, float] = {}
+_enrich_lock = threading.Lock()
+
+
+def _should_schedule_enrich(person_id: int) -> bool:
+    """True (and reserves a cooldown) if this person isn't already being enriched / recently attempted."""
+    now = time.monotonic()
+    with _enrich_lock:
+        deadline = _enrich_inflight.get(person_id)
+        if deadline is not None and now < deadline:
+            return False
+        _enrich_inflight[person_id] = now + _ENRICH_COOLDOWN_S
+        # Bound the map: drop expired reservations once it grows (a large library has many people).
+        if len(_enrich_inflight) > 1024:
+            for pid in [p for p, d in _enrich_inflight.items() if d <= now]:
+                del _enrich_inflight[pid]
+        return True
+
+
 def _enrich_person_bg(person_id: int) -> None:
     """Fetch + persist one person's TMDB bio OFF the request path — a FastAPI background task that runs
     AFTER the response is sent, so the outbound TMDB call never sits on the serve latency (the module's
@@ -150,7 +178,14 @@ def person_detail(
     """
     person = db.execute(select(PlexPerson).where(PlexPerson.name == name)).scalars().first()
     # Lazy one-time bio enrich, scheduled AFTER the response so the TMDB call is never on the serve path.
-    if person is not None and person.tmdb_person_id and person.tmdb_enriched_at is None:
+    # Gated by a per-person cooldown so concurrent/rapid opens (or repeated opens while TMDB is degraded)
+    # can't pile background tasks onto the shared threadpool.
+    if (
+        person is not None
+        and person.tmdb_person_id
+        and person.tmdb_enriched_at is None
+        and _should_schedule_enrich(person.id)
+    ):
         background_tasks.add_task(_enrich_person_bg, person.id)
     movie_lib_ids, show_lib_ids = _content_libs(db)
 

backend/tests/test_plex_discover.py

@@ -140,6 +140,30 @@ def test_continue_watching_null_status_in_hidden_out(db, monkeypatch):
     assert "mh" not in ids  # hidden is excluded
 
 
+def test_continue_watching_excludes_fully_watched_show(db, monkeypatch):
+    # A show whose every episode is watched is DONE, not in-progress: the `watched < total` guard must
+    # keep it off the Continue-watching rail (a bare `watched > 0` would wrongly resurface it).
+    lib_s = PlexLibrary(plex_key="2", title="Shows", kind="show", enabled=True)
+    db.add(lib_s)
+    db.flush()
+    sh = PlexShow(rating_key="shw", library_id=lib_s.id, title="All Watched", child_count=1)
+    db.add(sh)
+    db.flush()
+    ep = PlexItem(rating_key="shwe1", library_id=lib_s.id, kind="episode", title="E1",
+                  show_id=sh.id, season_number=1, episode_number=1)
+    db.add(ep)
+    db.flush()
+    user = User(email="fullywatched@example.com")
+    db.add(user)
+    db.flush()
+    db.add(PlexState(user_id=user.id, item_id=ep.id, status="watched", position_seconds=0,
+                     progress_updated_at=NOW))
+    db.commit()
+
+    ids = _ids(_get(db, user, monkeypatch, "/api/plex/discover?scope=show").json()["continue_watching"])
+    assert "shw" not in ids  # fully watched → excluded from continue-watching
+
+
 def test_because_you_watched_resolves_in_library_recs(db, monkeypatch):
     user = _seed(db)
     d = _get(db, user, monkeypatch, "/api/plex/discover?scope=both").json()

backend/tests/test_plex_person_bio.py

@@ -47,6 +47,22 @@ def test_parse_person_empty_payload():
     assert p["biography"] is None and p["known_for"] is None
 
 
+def test_parse_person_keeps_same_id_across_media_types():
+    # TMDB movie ids and tv ids are independent, so a movie-42 and a tv-42 credit are two distinct works
+    # and BOTH must survive the dedup (keyed on (id, media_type), not the bare id).
+    payload = {
+        "combined_credits": {
+            "cast": [
+                {"id": 42, "media_type": "movie", "title": "Movie 42", "popularity": 90},
+                {"id": 42, "media_type": "tv", "name": "Show 42", "popularity": 80},
+                {"id": 42, "media_type": "movie", "title": "dup movie 42", "popularity": 5},  # real dup
+            ]
+        }
+    }
+    kf = plex_tmdb.parse_person(payload)["known_for"]
+    assert [(k["tmdb_id"], k["media_type"]) for k in kf] == [(42, "movie"), (42, "tv")]  # both kept, dup dropped
+
+
 class _FakeTmdb:
     def __init__(self, payload):
         self.payload = payload
@@ -73,6 +89,49 @@ def test_enrich_person_persists_and_stamps(db, monkeypatch):
     assert [k["tmdb_id"] for k in person.known_for] == [20, 10, 30]
 
 
+class _FakeTmdbResult:
+    """Context-manager TmdbClient stand-in whose fetch_person raises / returns a fixed payload."""
+
+    def __init__(self, *, raises=False, payload=None):
+        self._raises = raises
+        self._payload = payload
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *a):
+        return False
+
+    def fetch_person(self, pid):
+        if self._raises:
+            raise plex_tmdb.TmdbError("429 rate limited")
+        return self._payload
+
+
+def test_enrich_person_transient_error_leaves_watermark_null(db, monkeypatch):
+    # A transient TmdbError must NOT stamp the watermark, so the next open retries (never permanently
+    # blank a person after one blip).
+    person = PlexPerson(name="Transient P", tmdb_person_id=555)
+    db.add(person)
+    db.commit()
+    monkeypatch.setattr(plex_tmdb.sysconfig, "get_str", lambda d, k: "key" if k == "tmdb_api_key" else "")
+    monkeypatch.setattr(plex_tmdb, "TmdbClient", lambda d, timeout=None: _FakeTmdbResult(raises=True))
+    assert plex_tmdb.enrich_person(db, person) is False
+    assert person.tmdb_enriched_at is None  # left NULL → retried next open
+
+
+def test_enrich_person_404_stamps_watermark_without_bio(db, monkeypatch):
+    # A 404 (deleted person → None payload) stamps the watermark so it isn't refetched every open.
+    person = PlexPerson(name="Gone P", tmdb_person_id=555)
+    db.add(person)
+    db.commit()
+    monkeypatch.setattr(plex_tmdb.sysconfig, "get_str", lambda d, k: "key" if k == "tmdb_api_key" else "")
+    monkeypatch.setattr(plex_tmdb, "TmdbClient", lambda d, timeout=None: _FakeTmdbResult(payload=None))
+    assert plex_tmdb.enrich_person(db, person) is True
+    assert person.tmdb_enriched_at is not None  # stamped
+    assert person.biography is None  # nothing fetched
+
+
 def test_enrich_person_noop_without_key(db, monkeypatch):
     person = PlexPerson(name="Actor Y", tmdb_person_id=555)
     db.add(person)
@@ -116,6 +175,7 @@ def test_person_detail_schedules_enrich_off_request_path(db, monkeypatch):
 
     scheduled: list[int] = []
     monkeypatch.setattr(people, "_enrich_person_bg", lambda pid: scheduled.append(pid))
+    people._enrich_inflight.clear()  # ensure the per-person cooldown guard doesn't suppress this open
 
     resp = _get(db, user, monkeypatch, "/api/plex/person/Lazy P")
     assert resp.status_code == 200, resp.text
@@ -123,6 +183,62 @@ def test_person_detail_schedules_enrich_off_request_path(db, monkeypatch):
     assert len(scheduled) == 1  # the enrich was scheduled off the request path
 
 
+def test_enrich_person_bg_closes_session_and_isolates_errors(monkeypatch):
+    # The background-task body must open a fresh session, fetch the person, and ALWAYS close it — rolling
+    # back (never propagating) if enrich_person raises. Pure-unit via a fake session (no DB needed).
+    from app.routes.plex import people
+
+    calls = {"rollback": 0, "close": 0, "enriched": 0}
+
+    class _FakeSession:
+        def __init__(self, person):
+            self._person = person
+
+        def get(self, model, pid):
+            return self._person
+
+        def rollback(self):
+            calls["rollback"] += 1
+
+        def close(self):
+            calls["close"] += 1
+
+    # Success path: person found → enrich called, session closed, no rollback.
+    monkeypatch.setattr(people, "SessionLocal", lambda: _FakeSession(object()))
+    monkeypatch.setattr(
+        people.plex_tmdb, "enrich_person", lambda db, p: calls.__setitem__("enriched", calls["enriched"] + 1)
+    )
+    people._enrich_person_bg(5)
+    assert calls == {"rollback": 0, "close": 1, "enriched": 1}
+
+    # Error path: enrich raises → rollback + close, no exception escapes.
+    calls.update({"rollback": 0, "close": 0, "enriched": 0})
+
+    def _boom(db, p):
+        raise RuntimeError("enrich blew up")
+
+    monkeypatch.setattr(people.plex_tmdb, "enrich_person", _boom)
+    people._enrich_person_bg(5)  # must not raise
+    assert calls["rollback"] == 1 and calls["close"] == 1
+
+    # Missing person (deleted id): None-guard skips enrich, session still closed.
+    calls.update({"rollback": 0, "close": 0, "enriched": 0})
+    monkeypatch.setattr(people, "SessionLocal", lambda: _FakeSession(None))
+    people._enrich_person_bg(9)
+    assert calls == {"rollback": 0, "close": 1, "enriched": 0}
+
+
+def test_should_schedule_enrich_dedups_within_cooldown():
+    # Concurrent/rapid opens of the same person must schedule the enrich only once per cooldown window.
+    from app.routes.plex import people
+
+    people._enrich_inflight.clear()
+    assert people._should_schedule_enrich(12345) is True  # first open reserves
+    assert people._should_schedule_enrich(12345) is False  # within cooldown → deduped
+    assert people._should_schedule_enrich(99999) is True  # a different person is independent
+    people._enrich_inflight.clear()
+
+
 def test_person_detail_no_enrich_when_already_enriched(db, monkeypatch):
     # An already-enriched person (tmdb_enriched_at set) must NOT schedule another background fetch.
     from datetime import datetime, timezone

backend/tests/test_plex_tmdb.py

@@ -293,6 +293,36 @@ def test_enrich_batch_skips_shows_without_guid(db):
     assert sh.tmdb_enriched_at is None
 
 
+def test_resolve_library_guids_scopes_to_given_libraries(db):
+    # The scoped path (person page) must keep a credit that lives in a NON-scoped library (disabled or an
+    # HU-overlay twin) OUT of the result; the unscoped path (detail recs) matches across all libraries;
+    # and an explicit empty list skips that media side entirely (distinct from None = match all).
+    lib_on = _lib(db, key="on", kind="movie")
+    lib_off = _lib(db, key="off", kind="movie")
+    m_on = PlexItem(rating_key="on1", library_id=lib_on.id, kind="movie", title="In Scope", guid="tmdb:100")
+    m_off = PlexItem(rating_key="off1", library_id=lib_off.id, kind="movie", title="Out", guid="tmdb:200")
+    db.add_all([m_on, m_off])
+    db.commit()
+    entries = [{"tmdb_id": 100, "media_type": "movie"}, {"tmdb_id": 200, "media_type": "movie"}]
+
+    # Scoped to lib_on: the row in lib_off is excluded.
+    movies, shows = tmdb.resolve_library_guids(
+        db, entries, movie_lib_ids=[lib_on.id], show_lib_ids=[]
+    )
+    assert set(movies) == {"tmdb:100"}
+    assert shows == {}
+
+    # Unscoped (None defaults): matches across all libraries.
+    movies_all, _ = tmdb.resolve_library_guids(db, entries)
+    assert set(movies_all) == {"tmdb:100", "tmdb:200"}
+
+    # Empty list for a media side skips its bucket even with candidates present (vs None = match all).
+    _, shows_empty = tmdb.resolve_library_guids(
+        db, [{"tmdb_id": 100, "media_type": "tv"}], show_lib_ids=[]
+    )
+    assert shows_empty == {}
+
+
 def test_resolve_recs_matches_by_media_type_not_bare_id(db):
     # TMDB movie ids and tv ids are independent, so tmdb:500 can be BOTH a show (in our library) and a
     # movie recommendation. The match must respect media_type — a bare-id match would deep-link the movie

frontend/src/components/AnchoredPopover.dom.test.tsx

@@ -0,0 +1,60 @@
+// @vitest-environment jsdom
+//
+// Gates the shared PopoverItem ARIA contract: aria-checked for menuitemradio/menuitemcheckbox and
+// aria-selected for option are rendered as explicit attributes AFTER the floating-ui item props (so they
+// win over getItemProps' single-select guess). Six live menus (LanguageSwitcher, ViewSwitcher,
+// AddToPlaylist, ChannelTags, tableHeader, plexDetailUi) depend on this; without a test, a regression in
+// the shared path would silently drop the checked indicator for screen-reader users. Floating-ui recipe:
+// stub the two observers autoUpdate wires, wrap in a FloatingTree, query the hidden surface.
+import { describe, it, expect, beforeAll, afterEach } from "vitest";
+import { useState } from "react";
+import { render, screen, cleanup } from "@testing-library/react";
+import { FloatingTree } from "@floating-ui/react";
+import { useAnchoredPopover, PopoverSurface, PopoverItem } from "./AnchoredPopover";
+
+beforeAll(() => {
+  class Stub {
+    observe() {}
+    unobserve() {}
+    disconnect() {}
+    takeRecords() {
+      return [];
+    }
+  }
+  globalThis.ResizeObserver ??= Stub as unknown as typeof ResizeObserver;
+  globalThis.IntersectionObserver ??= Stub as unknown as typeof IntersectionObserver;
+});
+
+afterEach(cleanup);
+
+function Menu() {
+  const [open, setOpen] = useState(true);
+  const pop = useAnchoredPopover({ open, onOpenChange: setOpen, mode: "menu" });
+  return (
+    <PopoverSurface popover={pop} ariaLabel="Choices">
+      <PopoverItem role="menuitemradio" checked onSelect={() => {}}>
+        Newest
+      </PopoverItem>
+      <PopoverItem role="menuitemradio" checked={false} onSelect={() => {}}>
+        Oldest
+      </PopoverItem>
+      <PopoverItem role="menuitemcheckbox" checked onSelect={() => {}}>
+        Show shorts
+      </PopoverItem>
+    </PopoverSurface>
+  );
+}
+
+describe("PopoverItem ARIA contract", () => {
+  it("exposes aria-checked on menuitemradio and menuitemcheckbox items", () => {
+    render(
+      <FloatingTree>
+        <Menu />
+      </FloatingTree>,
+    );
+    const radios = screen.getAllByRole("menuitemradio", { hidden: true });
+    expect(radios.map((r) => r.getAttribute("aria-checked"))).toEqual(["true", "false"]);
+    const checkbox = screen.getByRole("menuitemcheckbox", { hidden: true });
+    expect(checkbox.getAttribute("aria-checked")).toBe("true");
+  });
+});

frontend/src/components/Combobox.dom.test.tsx

@@ -127,6 +127,71 @@ describe("Combobox", () => {
     expect(screen.getByText("plex.filter.moreRefine")).toBeTruthy(); // 10 hidden behind search
   });
 
+  it("Enter commits the pointer-highlighted option, not the arrow-active one", () => {
+    // The visible highlight follows the pointer (hoverIndex); Enter must commit THAT row, not the bare
+    // keyboard activeIndex — otherwise arrow-then-hover-then-Enter toggles a different option than shown.
+    const onChange = vi.fn();
+    wrap(<Combobox label="Genre" options={OPTIONS} selected={[]} onChange={onChange} />);
+    const input = screen.getByRole("combobox");
+    input.focus();
+    fireEvent.focus(input);
+    fireEvent.keyDown(input, { key: "ArrowDown" }); // activeIndex → 0 (Drama)
+    const action = screen
+      .getAllByRole("option", { hidden: true })
+      .find((el) => el.textContent?.includes("Action"))!;
+    fireEvent.mouseMove(action); // hoverIndex → Action (the visibly highlighted row)
+    fireEvent.keyDown(input, { key: "Enter" });
+    expect(onChange).toHaveBeenCalledWith(["Action"]); // the highlighted (hovered) row, not Drama
+  });
+
+  it("Enter commits a hover-highlighted option even with no prior arrow key", () => {
+    const onChange = vi.fn();
+    wrap(<Combobox label="Genre" options={OPTIONS} selected={[]} onChange={onChange} />);
+    const input = screen.getByRole("combobox");
+    input.focus();
+    fireEvent.focus(input);
+    const comedy = screen
+      .getAllByRole("option", { hidden: true })
+      .find((el) => el.textContent?.includes("Comedy"))!;
+    fireEvent.mouseMove(comedy); // highlight via hover, activeIndex still null
+    fireEvent.keyDown(input, { key: "Enter" });
+    expect(onChange).toHaveBeenCalledWith(["Comedy"]); // no longer a silent no-op
+  });
+
+  it("async mode: controlled query + onQueryChange/onOpenChange, no client filter, selectedLabels chip", () => {
+    const onQueryChange = vi.fn();
+    const onOpenChange = vi.fn();
+    const onChange = vi.fn();
+    const serverOpts = [{ value: "id1", label: "Harry Potter", count: 8 }];
+    wrap(
+      <Combobox
+        label="Collection"
+        multiple={false}
+        clientFilter={false}
+        options={serverOpts}
+        selected={["stored-id"]}
+        selectedLabels={{ "stored-id": "Stored Collection" }}
+        query="har"
+        onQueryChange={onQueryChange}
+        onOpenChange={onOpenChange}
+        onChange={onChange}
+      />,
+    );
+    // The selected value's option isn't in the (server-narrowed) list, so its chip uses selectedLabels.
+    expect(screen.getByText("Stored Collection")).toBeTruthy();
+    const input = screen.getByRole("combobox");
+    fireEvent.focus(input);
+    expect(onOpenChange).toHaveBeenCalledWith(true);
+    fireEvent.change(input, { target: { value: "harr" } });
+    expect(onQueryChange).toHaveBeenCalledWith("harr"); // controlled query propagates out
+    // clientFilter=false: the single server option renders verbatim (not re-filtered against "har").
+    const opts = screen.getAllByRole("option", { hidden: true });
+    expect(opts.length).toBe(1);
+    expect(opts[0]?.textContent).toContain("Harry Potter");
+    fireEvent.click(screen.getByText("Harry Potter"));
+    expect(onChange).toHaveBeenCalledWith(["id1"]); // single-select replaces
+  });
+
   it("single-select: picking replaces the value and closes the list", () => {
     const onChange = vi.fn();
     wrap(

frontend/src/components/Combobox.tsx

@@ -100,7 +100,11 @@ export default function Combobox({
     onOpenChange?.(next);
   };
   const pop = useAnchoredPopover({ open, onOpenChange: setOpenAnd, mode: "combobox" });
-  const { activeIndex } = pop;
+  // `highlightIndex` = the row the user actually SEES highlighted (pointer hover, else keyboard); Enter
+  // commits THAT, not the bare keyboard `activeIndex` — otherwise arrow-then-hover-then-Enter would toggle
+  // a different option than the highlighted one, and a hover with no prior arrow (activeIndex still null)
+  // would make Enter a no-op over a highlighted row.
+  const { activeIndex, highlightIndex } = pop;
 
   // Clear the typed query when the list closes.
   useEffect(() => {
@@ -176,9 +180,10 @@ export default function Combobox({
             },
             onFocus: () => setOpenAnd(true),
             onKeyDown: (e) => {
-              if (e.key === "Enter" && open && activeIndex != null && visible[activeIndex]) {
+              const idx = highlightIndex ?? activeIndex;
+              if (e.key === "Enter" && open && idx != null && visible[idx]) {
                 e.preventDefault(); // select the highlighted option, don't submit a surrounding form
-                if (!visible[activeIndex].disabled) commit(visible[activeIndex].value);
+                if (!visible[idx].disabled) commit(visible[idx].value);
               } else if (e.key === "Backspace" && query === "" && selected.length > 0) {
                 // Backspace on an empty field removes the last chip (react-select behaviour).
                 onChange(selected.slice(0, -1));

frontend/src/components/PlexInfo.dom.test.tsx

@@ -109,6 +109,24 @@ describe("PlexInfo enriched detail (page)", () => {
     expect(onOpenPerson).toHaveBeenCalledWith("Jane Director");
   });
 
+  it("RatingsRow: with no IMDb score, the audience score becomes the filterable one", () => {
+    const onFilter = vi.fn();
+    const noImdb = { ...detail, imdb_rating: null, imdb_id: null, imdb_url: null };
+    wrap(<PlexInfo detail={noImdb} variant="page" onFilter={onFilter} />);
+    expect(screen.queryByText("IMDb")).toBeNull();
+    // audience (8.4) is now the primary/filterable score → clicking it filters ratingMin.
+    fireEvent.click(screen.getByText("8.4"));
+    expect(onFilter).toHaveBeenCalledWith({ ratingMin: 8 });
+  });
+
+  it("RatingsRow: suppresses the duplicate audience chip when it equals the IMDb score", () => {
+    const dupe = { ...detail, rating: 7.8 }; // audience == imdb_rating (7.8)
+    wrap(<PlexInfo detail={dupe} variant="page" />);
+    expect(screen.getByText("IMDb")).toBeTruthy();
+    expect(screen.queryByText("plex.info.audience")).toBeNull(); // duplicate audience chip suppressed
+    expect(screen.getAllByText("7.8")).toHaveLength(1); // the score shows once (IMDb only)
+  });
+
   it("the overlay variant stays lean (no facts / keywords / crew panels)", () => {
     wrap(<PlexInfo detail={detail} variant="overlay" />);
     expect(screen.queryByText("plex.info.facts.title")).toBeNull();

frontend/src/components/PlexInfo.tsx

@@ -15,6 +15,7 @@ import {
   useDetailPrefs,
 } from "../lib/plexDetailUi";
 import { usePref } from "../lib/usePref";
+import i18n from "../i18n";
 import { Carousel } from "./Carousel";
 import PlexCollectionEditor from "./PlexCollectionEditor";
 import PlexPlaylistAdd from "./PlexPlaylistAdd";
@@ -27,9 +28,13 @@ import PlexPlaylistAdd from "./PlexPlaylistAdd";
 // The TMDB-enriched pieces (multi-source ratings row, facts, keyword chips, full crew — E5 S5) render
 // on the page variant only; the overlay stays lean.
 
-const compact = (n: number) => new Intl.NumberFormat("en", { notation: "compact" }).format(n);
+// Localize the grouping/compact notation to the active language (the app convention, lib/api/core.ts);
+// `i18n.language` is read at call time, and the component re-renders on a language switch. Currency stays
+// USD — TMDB budget/revenue figures are USD regardless of the viewer's language.
+const compact = (n: number) =>
+  new Intl.NumberFormat(i18n.language, { notation: "compact" }).format(n);
 const money = (n: number) =>
-  new Intl.NumberFormat("en-US", {
+  new Intl.NumberFormat(i18n.language, {
     notation: "compact",
     style: "currency",
     currency: "USD",

frontend/src/i18n/locales/en/plex.json

@@ -72,7 +72,6 @@
     "collectionEmpty": "No collections",
     "matchLabel": "Match",
     "studio": "Studio",
-    "add": "Add",
     "moreRefine": "{{count}} more — refine with search"
   },
   "count": "{{count}} titles",

frontend/src/i18n/locales/hu/plex.json

@@ -72,7 +72,6 @@
     "collectionEmpty": "Nincs kollekció",
     "matchLabel": "Egyezés",
     "studio": "Stúdió",
-    "add": "Hozzáadás",
     "moreRefine": "még {{count}} — finomíts kereséssel"
   },
   "count": "{{count}} cím",