fix(plex): explain an empty search when filters are also active

A Plex search that returns nothing while a collection/rating filter is
active showed a bare "No matches", hiding that the filters — not the
query — were the cause. Show how many filters are narrowing the results
and offer a one-click Clear filters inline. Translated in all three
languages.

frontend/src/components/PlexBrowse.tsx

@@ -2,7 +2,14 @@ import { lazy, Suspense, useEffect, useLayoutEffect, useRef, useState, type CSSP
 import { useTranslation } from "react-i18next";
 import { useInfiniteQuery, useQuery, useQueryClient } from "@tanstack/react-query";
 import { ArrowLeft, CheckCircle2, Info, ListPlus, Play } from "lucide-react";
-import { api, type PlexCard, type PlexFilters, type PlexPerson } from "../lib/api";
+import {
+  api,
+  EMPTY_PLEX_FILTERS,
+  plexFilterCount,
+  type PlexCard,
+  type PlexFilters,
+  type PlexPerson,
+} from "../lib/api";
 import { useDebounced } from "../lib/useDebounced";
 import { useHistorySubview } from "../lib/history";
 import PlexPlaylistAdd, { type PlexAddTarget } from "./PlexPlaylistAdd";
@@ -267,7 +274,21 @@ export default function PlexBrowse({
       {browseQ.isLoading ? (
         <p className="text-muted text-sm">{t("plex.loading")}</p>
       ) : items.length === 0 ? (
-        <p className="text-muted text-sm">{dq ? t("plex.noMatches") : t("plex.empty")}</p>
+        dq && plexFilterCount(filters) > 0 ? (
+          // A search that comes up empty WHILE filters are active is usually the filters, not the
+          // query — say so and offer a one-click escape, instead of a bare "No matches".
+          <div className="flex flex-wrap items-center gap-3 text-sm text-muted">
+            <span>{t("plex.noMatchesFiltered", { count: plexFilterCount(filters) })}</span>
+            <button
+              onClick={() => setFilters(EMPTY_PLEX_FILTERS)}
+              className="rounded-full border border-border bg-card px-3 py-1 text-xs font-medium transition hover:border-accent hover:text-accent"
+            >
+              {t("plex.filter.clearAll")}
+            </button>
+          </div>
+        ) : (
+          <p className="text-muted text-sm">{dq ? t("plex.noMatches") : t("plex.empty")}</p>
+        )
       ) : (
         <div className="grid grid-cols-[repeat(auto-fill,minmax(150px,1fr))] gap-3">
           {items.map((c) => (

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

@@ -57,6 +57,8 @@
   "count": "{{count}} Titel",
   "searchCount": "{{count}} Treffer",
   "noMatches": "Keine Treffer.",
+  "noMatchesFiltered_one": "Keine Treffer — ein Filter schränkt die Ergebnisse zusätzlich ein.",
+  "noMatchesFiltered_other": "Keine Treffer — {{count}} Filter schränken die Ergebnisse zusätzlich ein.",
   "loading": "Wird geladen…",
   "empty": "Noch nichts hier. Starte eine Plex-Synchronisierung auf der Admin-Konfigurationsseite.",
   "loadMore": "Mehr laden",

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

@@ -57,6 +57,8 @@
   "count": "{{count}} titles",
   "searchCount": "{{count}} matches",
   "noMatches": "No matches.",
+  "noMatchesFiltered_one": "No matches — a filter is also narrowing the results.",
+  "noMatchesFiltered_other": "No matches — {{count}} filters are also narrowing the results.",
   "loading": "Loading…",
   "empty": "Nothing here yet. Run a Plex sync from the admin Config page.",
   "loadMore": "Load more",

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

@@ -57,6 +57,8 @@
   "count": "{{count}} cím",
   "searchCount": "{{count}} találat",
   "noMatches": "Nincs találat.",
+  "noMatchesFiltered_one": "Nincs találat — egy szűrő is szűkíti az eredményt.",
+  "noMatchesFiltered_other": "Nincs találat — {{count}} szűrő is szűkíti az eredményt.",
   "loading": "Betöltés…",
   "empty": "Még nincs itt semmi. Futtass egy Plex-szinkront az admin Konfiguráció oldalról.",
   "loadMore": "Több betöltése",