Feat: Backtracing + NavPage Store

src/features/discover/components/KeywordTab.svelte

@@ -76,7 +76,7 @@
     let filtered = allSources;
     if (kw_selectedLangs.size > 0)
       filtered = filtered.filter((s) => kw_selectedLangs.has(s.lang));
-    if (!store.settings.showNsfw)
+    if (store.settings.contentLevel !== "unrestricted")
       filtered = filtered.filter((s) => !shouldHideSource(s, store.settings));
     return filtered;
   }

src/features/discover/components/Search.svelte

@@ -8,7 +8,7 @@
   import { deprioritizeQueue }  from "@core/cache/imageCache";
   import { dedupeSourcesByLang }from "@core/algorithms/filter";
   import { shouldHideNsfw }     from "@core/util";
-  import { store, setSearchPrefill, setPreviewManga } from "@store/state.svelte";
+  import { store, setSearchPrefill, setPreviewManga, setSearchQuery } from "@store/state.svelte";
   import {
     toCachedManga,
     type CachedManga,
@@ -288,6 +288,8 @@
       popularResults={popular_results}
       popularLoading={popular_loading}
       {sourceCache}
+      query={store.searchQuery}
+      onQueryChange={setSearchQuery}
       onPrefillConsumed={() => (pendingPrefill = "")}
       onPreview={setPreviewManga}
     />

src/features/library/components/Library.svelte

@@ -18,6 +18,7 @@
     store, setCategories, setLibraryUpdates, addToast,
     setTabSort, toggleTabSortDir, setTabStatus, toggleTabFilter, clearTabFilters,
   } from "../store/libraryState.svelte";
+  import { saveScroll, getScroll } from "@store/state.svelte";
   import type { LibrarySortMode, LibrarySortDir, LibraryStatusFilter, LibraryContentFilter, LibraryUpdateEntry } from "@store/state.svelte";
   import type { Manga, Category, Chapter } from "@types";
   import { checkAndMarkCompleted as storeCheckAndMarkCompleted, updateSettings } from "@store/state.svelte";
@@ -171,7 +172,18 @@
 
   $effect(() => { filtered; untrack(() => { renderVisible = paginator.reset(); }); });
   $effect(() => { retryCount; loading = true; error = null; if (retryCount > 0) cache.clear(CACHE_KEYS.LIBRARY); untrack(() => loadData()); });
-  $effect(() => { if (scrollEl) scrollEl.scrollTo({ top: 0 }); });
+  let prevTab = tab;
+  $effect(() => {
+    const nextTab = tab;
+    if (scrollEl && nextTab !== prevTab) {
+      saveScroll(`library:${prevTab}`, scrollEl.scrollTop);
+      const saved = getScroll(`library:${nextTab}`);
+      untrack(() => { scrollEl.scrollTo({ top: saved }); });
+      prevTab = nextTab;
+    } else if (scrollEl && nextTab === prevTab) {
+      scrollEl.scrollTo({ top: 0 });
+    }
+  });
   $effect(() => {
     const f = tab;
     if (f === "library" || f === "downloaded") return;

src/features/series/components/ChapterList.svelte

@@ -14,6 +14,7 @@
     enqueueing:      Set<number>;
     chapterPage:     number;
     totalPages:      number;
+    scrollEl?:       HTMLDivElement | null;
     onOpen:          (ch: Chapter, inProgress: boolean) => void;
     onToggleSelect:  (id: number, e: MouseEvent | KeyboardEvent) => void;
     onEnqueue:       (ch: Chapter, e: MouseEvent) => void;
@@ -25,6 +26,7 @@
   let {
     pageChapters, sortedChapters, viewMode, loadingChapters,
     selectedIds, enqueueing, chapterPage, totalPages,
+    scrollEl = $bindable(null),
     onOpen, onToggleSelect, onEnqueue, onDeleteDownload,
     onPageChange, buildCtxItems,
   }: Props = $props();
@@ -48,7 +50,7 @@
   }
 </script>
 
-<div class={viewMode === "grid" ? "ch-grid" : "ch-list"}>
+<div class={viewMode === "grid" ? "ch-grid" : "ch-list"} bind:this={scrollEl}>
   {#if loadingChapters && sortedChapters.length === 0}
     {#if viewMode === "grid"}
       {#each Array(24) as _}<div class="grid-cell-skeleton skeleton"></div>{/each}

src/features/series/components/SeriesDetail.svelte

@@ -17,6 +17,7 @@
     addBookmark, acknowledgeUpdate,
     checkAndMarkCompleted as storeCheckAndMarkCompleted,
     clearMarkersForManga,
+    saveScroll, getScroll,
   } from "@store/state.svelte";
   import { trackingState } from "@features/tracking/store/trackingState.svelte";
   import type { MangaPrefs } from "@store/state.svelte";
@@ -583,6 +584,20 @@
     } catch (e) { console.error(e); }
   }
 
+  let chapterListEl: HTMLDivElement | null = $state(null);
+  let prevMangaId: number | null = null;
+
+  $effect(() => {
+    const mangaId = store.activeManga?.id ?? null;
+    if (mangaId === prevMangaId) return;
+    if (chapterListEl && prevMangaId !== null) saveScroll(`series:${prevMangaId}`, chapterListEl.scrollTop);
+    prevMangaId = mangaId;
+    if (chapterListEl && mangaId !== null) {
+      const saved = getScroll(`series:${mangaId}`);
+      chapterListEl.scrollTo({ top: saved });
+    }
+  });
+
   onMount(() => () => { mangaAbort?.abort(); chapterAbort?.abort(); });
 </script>
 
@@ -665,6 +680,7 @@
       {enqueueing}
       {chapterPage}
       {totalPages}
+      bind:scrollEl={chapterListEl}
       onOpen={openReaderWithAhead}
       onToggleSelect={toggleSelect}
       onEnqueue={enqueue}

src/features/tracking/components/TrackingPreview.svelte

@@ -115,7 +115,7 @@
   function openManga() {
     if (!record.manga) return;
     setActiveManga(record.manga as any);
-    setNavPage("library");
+    setNavPage(store.navPage);
     onClose();
   }