fix(library): reset (X) also clears sort & order, via a shared hook

The mobile ResetFiltersButton and the TV filter header each had their own
active-state and reset logic, and both ignored sort & order — so the reset
chip never appeared for a changed sort and reset never restored it.

Centralise both in useFilterReset(libraryId): the chip now reflects a
non-default sort, and reset restores SortName/Ascending and clears the
per-library persisted sort/order/filter preferences so the reset sticks.

app/(auth)/(tabs)/(home,libraries,search,favorites,watchlists)/collections/[collectionId].tsx

@@ -326,7 +326,7 @@ const page: React.FC = () => {
         data={[
           {
             key: "reset",
-            component: <ResetFiltersButton />,
+            component: <ResetFiltersButton libraryId={collectionId} />,
           },
           {
             key: "genre",

app/(auth)/(tabs)/(libraries)/[libraryId].tsx

@@ -39,6 +39,7 @@ import { TVPosterCard } from "@/components/tv/TVPosterCard";
 import { useScaledTVPosterSizes } from "@/constants/TVPosterSizes";
 import { useScaledTVTypography } from "@/constants/TVTypography";
 import useRouter from "@/hooks/useAppRouter";
+import { useFilterReset } from "@/hooks/useFilterReset";
 import { useOrientation } from "@/hooks/useOrientation";
 import { useRefreshLibraryOnFocus } from "@/hooks/useRefreshLibraryOnFocus";
 import { useTVItemActionModal } from "@/hooks/useTVItemActionModal";
@@ -521,7 +522,7 @@ const Page = () => {
         data={[
           {
             key: "reset",
-            component: <ResetFiltersButton />,
+            component: <ResetFiltersButton libraryId={libraryId} />,
           },
           {
             key: "genre",
@@ -688,19 +689,9 @@ const Page = () => {
     ],
   );
 
-  // TV Filter bar header
-  const hasActiveFilters =
-    selectedGenres.length > 0 ||
-    selectedYears.length > 0 ||
-    selectedTags.length > 0 ||
-    filterBy.length > 0;
-
-  const resetAllFilters = useCallback(() => {
-    setSelectedGenres([]);
-    setSelectedYears([]);
-    setSelectedTags([]);
-    _setFilterBy([]);
-  }, [setSelectedGenres, setSelectedYears, setSelectedTags, _setFilterBy]);
+  // Filter bar reset + visibility, shared with the mobile ResetFiltersButton so
+  // sort/order can't be forgotten on one path (it used to be reset on neither).
+  const { hasActiveFilters, resetAllFilters } = useFilterReset(libraryId);
 
   // TV Filter options - with "All" option for clearable filters
   const tvGenreFilterOptions = useMemo(

components/filters/ResetFiltersButton.tsx

@@ -1,38 +1,24 @@
 import { Ionicons } from "@expo/vector-icons";
-import { useAtom } from "jotai";
 import { TouchableOpacity, type TouchableOpacityProps } from "react-native";
-import {
-  filterByAtom,
-  genreFilterAtom,
-  tagsFilterAtom,
-  yearFilterAtom,
-} from "@/utils/atoms/filters";
+import { useFilterReset } from "@/hooks/useFilterReset";
 
-interface Props extends TouchableOpacityProps {}
+interface Props extends TouchableOpacityProps {
+  libraryId: string;
+}
 
-export const ResetFiltersButton: React.FC<Props> = ({ ...props }) => {
-  const [selectedGenres, setSelectedGenres] = useAtom(genreFilterAtom);
-  const [selectedTags, setSelectedTags] = useAtom(tagsFilterAtom);
-  const [selectedYears, setSelectedYears] = useAtom(yearFilterAtom);
-  const [selectedFilters, setSelectedFilters] = useAtom(filterByAtom);
+export const ResetFiltersButton: React.FC<Props> = ({
+  libraryId,
+  ...props
+}) => {
+  const { hasActiveFilters, resetAllFilters } = useFilterReset(libraryId);
 
-  if (
-    selectedGenres.length === 0 &&
-    selectedTags.length === 0 &&
-    selectedYears.length === 0 &&
-    selectedFilters.length === 0
-  ) {
+  if (!hasActiveFilters) {
     return null;
   }
 
   return (
     <TouchableOpacity
-      onPress={() => {
-        setSelectedGenres([]);
-        setSelectedTags([]);
-        setSelectedYears([]);
-        setSelectedFilters([]);
-      }}
+      onPress={resetAllFilters}
       className='bg-purple-600 rounded-full w-[30px] h-[30px] flex items-center justify-center mr-1'
       {...props}
     >

hooks/useFilterReset.ts

@@ -0,0 +1,84 @@
+import { useAtom } from "jotai";
+import { useCallback } from "react";
+import {
+  FilterByPreferenceAtom,
+  filterByAtom,
+  genreFilterAtom,
+  SortByOption,
+  SortOrderOption,
+  sortByAtom,
+  sortByPreferenceAtom,
+  sortOrderAtom,
+  sortOrderPreferenceAtom,
+  tagsFilterAtom,
+  yearFilterAtom,
+} from "@/utils/atoms/filters";
+
+/**
+ * Single source of truth for the library filter bar's "reset" action and its
+ * visibility. The mobile ResetFiltersButton and the TV filter header both use
+ * this so they can't drift — sort/order used to be reset on neither path, so
+ * the reset (X) never reflected a changed sort.
+ *
+ * A reset clears the session filters AND the per-library persisted preferences
+ * (sort, order, filterBy); otherwise the saved preference resurfaces when the
+ * library's mount effect re-applies it on the next entry.
+ */
+export const useFilterReset = (libraryId: string) => {
+  const [selectedGenres, setSelectedGenres] = useAtom(genreFilterAtom);
+  const [selectedYears, setSelectedYears] = useAtom(yearFilterAtom);
+  const [selectedTags, setSelectedTags] = useAtom(tagsFilterAtom);
+  const [filterBy, setFilterBy] = useAtom(filterByAtom);
+  const [sortBy, setSortBy] = useAtom(sortByAtom);
+  const [sortOrder, setSortOrder] = useAtom(sortOrderAtom);
+  const [, setSortByPreference] = useAtom(sortByPreferenceAtom);
+  const [, setSortOrderPreference] = useAtom(sortOrderPreferenceAtom);
+  const [, setFilterByPreference] = useAtom(FilterByPreferenceAtom);
+
+  // SortName / Ascending is the baseline a library opens with (mount-effect
+  // fallback), so any other value counts as an active, resettable sort.
+  const hasActiveFilters =
+    selectedGenres.length > 0 ||
+    selectedYears.length > 0 ||
+    selectedTags.length > 0 ||
+    filterBy.length > 0 ||
+    sortBy[0] !== SortByOption.SortName ||
+    sortOrder[0] !== SortOrderOption.Ascending;
+
+  const resetAllFilters = useCallback(() => {
+    setSelectedGenres([]);
+    setSelectedYears([]);
+    setSelectedTags([]);
+    setFilterBy([]);
+    setSortBy([SortByOption.SortName]);
+    setSortOrder([SortOrderOption.Ascending]);
+    setSortByPreference((prev) => {
+      const next = { ...prev };
+      delete next[libraryId];
+      return next;
+    });
+    setSortOrderPreference((prev) => {
+      const next = { ...prev };
+      delete next[libraryId];
+      return next;
+    });
+    setFilterByPreference((prev) => {
+      const next = { ...prev };
+      delete next[libraryId];
+      return next;
+    });
+  }, [
+    libraryId,
+    setSelectedGenres,
+    setSelectedYears,
+    setSelectedTags,
+    setFilterBy,
+    setSortBy,
+    setSortOrder,
+    setSortByPreference,
+    setSortOrderPreference,
+    setFilterByPreference,
+  ]);
+
+  return { hasActiveFilters, resetAllFilters };
+};