diff --git a/dev.moku.app.yml b/dev.moku.app.yml
index 8f15b8b..0a09554 100644
--- a/dev.moku.app.yml
+++ b/dev.moku.app.yml
@@ -181,7 +181,7 @@ modules:
         path: .
       - type: file
         path: packaging/frontend-dist.tar.gz
-        sha256: 386b393cd29f84064a3abef926237cb8a028da49c930a24ead7ad8a67d671a9c
+        sha256: 58b475fccdd41807dfd5e55e236925b9d88ed1df49367fb93f7e463d7ae204d2
       - packaging/cargo-sources.json
       - type: inline
         dest: src-tauri/.cargo
diff --git a/packaging/frontend-dist.tar.gz b/packaging/frontend-dist.tar.gz
index b5f29fa..25f5062 100644
Binary files a/packaging/frontend-dist.tar.gz and b/packaging/frontend-dist.tar.gz differ
diff --git a/src/components/layout/Sidebar.module.css b/src/components/layout/Sidebar.module.css
index b8996b6..29e7214 100644
--- a/src/components/layout/Sidebar.module.css
+++ b/src/components/layout/Sidebar.module.css
@@ -15,29 +15,32 @@
   display: flex;
   align-items: center;
   justify-content: center;
-
   margin-bottom: var(--sp-3);
-
   overflow: visible;
+  background: none;
+  border: none;
+  cursor: pointer;
+  border-radius: var(--radius-lg);
+  transition: opacity var(--t-base), transform var(--t-base);
+  padding: 0;
 }
+.logo:hover { opacity: 0.8; transform: scale(0.96); }
+.logo:active { transform: scale(0.92); }
 
 .logoIcon {
   width: 80px;
   height: 80px;
-
   background-color: var(--accent);
-
   mask-image: url("../../assets/moku-icon.svg");
   mask-repeat: no-repeat;
   mask-position: center;
   mask-size: contain;
-
   -webkit-mask-image: url("../../assets/moku-icon.svg");
   -webkit-mask-repeat: no-repeat;
   -webkit-mask-position: center;
   -webkit-mask-size: contain;
-
   filter: drop-shadow(0 0 8px rgba(107, 143, 107, 0.35));
+  pointer-events: none;
 }
 
 .nav {
@@ -51,54 +54,28 @@
 }
 
 .tab {
-  width: 36px;
-  height: 36px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
+  width: 36px; height: 36px;
+  display: flex; align-items: center; justify-content: center;
   border-radius: var(--radius-md);
   color: var(--text-faint);
   transition: color var(--t-base), background var(--t-base);
 }
-
-.tab:hover {
-  color: var(--text-muted);
-  background: var(--bg-raised);
-}
-
-.tabActive {
-  color: var(--accent-fg);
-  background: var(--accent-muted);
-}
-
-.tabActive:hover {
-  color: var(--accent-fg);
-  background: var(--accent-muted);
-}
+.tab:hover { color: var(--text-muted); background: var(--bg-raised); }
+.tabActive { color: var(--accent-fg); background: var(--accent-muted); }
+.tabActive:hover { color: var(--accent-fg); background: var(--accent-muted); }
 
 .bottom {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  width: 100%;
-  padding: var(--sp-3) var(--sp-2) 0;
+  display: flex; flex-direction: column; align-items: center;
+  width: 100%; padding: var(--sp-3) var(--sp-2) 0;
   border-top: 1px solid var(--border-dim);
   margin-top: var(--sp-3);
 }
 
 .settingsBtn {
-  width: 36px;
-  height: 36px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
+  width: 36px; height: 36px;
+  display: flex; align-items: center; justify-content: center;
   border-radius: var(--radius-md);
   color: var(--text-faint);
   transition: color var(--t-base), background var(--t-base), transform var(--t-slow);
 }
-
-.settingsBtn:hover {
-  color: var(--text-muted);
-  background: var(--bg-raised);
-  transform: rotate(30deg);
-}
\ No newline at end of file
+.settingsBtn:hover { color: var(--text-muted); background: var(--bg-raised); transform: rotate(30deg); }
\ No newline at end of file
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index 98893be..22322bf 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -6,30 +6,40 @@ import { useStore, type NavPage } from "../../store";
 import s from "./Sidebar.module.css";
 
 const TABS: { id: NavPage; icon: React.ReactNode; label: string }[] = [
-  { id: "library",    icon: <Books size={18} weight="light" />,                  label: "Library"    },
-  { id: "search",     icon: <MagnifyingGlass size={18} weight="light" />,        label: "Search"     },
-  { id: "history",    icon: <ClockCounterClockwise size={18} weight="light" />,  label: "History"    },
-  { id: "sources",    icon: <Compass size={18} weight="light" />,                label: "Sources"    },
-  { id: "downloads",  icon: <DownloadSimple size={18} weight="light" />,         label: "Downloads"  },
-  { id: "extensions", icon: <PuzzlePiece size={18} weight="light" />,            label: "Extensions" },
+  { id: "library",    icon: <Books size={18} weight="light" />,                 label: "Library"    },
+  { id: "search",     icon: <MagnifyingGlass size={18} weight="light" />,       label: "Search"     },
+  { id: "history",    icon: <ClockCounterClockwise size={18} weight="light" />, label: "History"    },
+  { id: "sources",    icon: <Compass size={18} weight="light" />,               label: "Sources"    },
+  { id: "downloads",  icon: <DownloadSimple size={18} weight="light" />,        label: "Downloads"  },
+  { id: "extensions", icon: <PuzzlePiece size={18} weight="light" />,           label: "Extensions" },
 ];
 
 export default function Sidebar() {
-  const navPage      = useStore((state) => state.navPage);
-  const setNavPage   = useStore((state) => state.setNavPage);
-  const setActiveSource = useStore((state) => state.setActiveSource);
-  const openSettings = useStore((state) => state.openSettings);
+  const navPage          = useStore((state) => state.navPage);
+  const setNavPage       = useStore((state) => state.setNavPage);
+  const setActiveSource  = useStore((state) => state.setActiveSource);
+  const setActiveManga   = useStore((state) => state.setActiveManga);
+  const setLibraryFilter = useStore((state) => state.setLibraryFilter);
+  const openSettings     = useStore((state) => state.openSettings);
 
   function navigate(id: NavPage) {
     setNavPage(id);
     if (id !== "sources") setActiveSource(null);
   }
 
+  function goHome() {
+    setNavPage("library");
+    setActiveSource(null);
+    setActiveManga(null);
+    setLibraryFilter("library");
+  }
+
   return (
     <aside className={s.root}>
-      <div className={s.logo}>
-        <div className={s.logoIcon} aria-label="Moku Logo" />
-      </div>
+      {/* Logo click → back to library root */}
+      <button className={s.logo} onClick={goHome} title="Go to Library" aria-label="Go to Library">
+        <div className={s.logoIcon} />
+      </button>
       <nav className={s.nav}>
         {TABS.map((tab) => (
           <button key={tab.id} title={tab.label}
diff --git a/src/components/pages/Library.tsx b/src/components/pages/Library.tsx
index 30a8544..da38a2a 100644
--- a/src/components/pages/Library.tsx
+++ b/src/components/pages/Library.tsx
@@ -1,10 +1,9 @@
 import { useEffect, useState, useMemo, useCallback, memo } from "react";
-import { MagnifyingGlass, Books, DownloadSimple, X } from "@phosphor-icons/react";
+import { MagnifyingGlass, Books, DownloadSimple, X, Folder, Trash } from "@phosphor-icons/react";
 import { gql, thumbUrl } from "../../lib/client";
-import { GET_LIBRARY, GET_ALL_MANGA, UPDATE_MANGA } from "../../lib/queries";
+import { GET_LIBRARY, GET_ALL_MANGA, UPDATE_MANGA, GET_CHAPTERS, DELETE_DOWNLOADED_CHAPTERS } from "../../lib/queries";
 import { useStore } from "../../store";
-import type { LibraryFilter } from "../../store";
-import type { Manga } from "../../lib/types";
+import type { Manga, Chapter } from "../../lib/types";
 import ContextMenu, { type ContextMenuEntry } from "../context/ContextMenu";
 import s from "./Library.module.css";
 
@@ -51,16 +50,15 @@ export default function Library() {
   const [visibleCount, setVisibleCount] = useState(INITIAL_PAGE_SIZE);
   const [ctx, setCtx] = useState<{ x: number; y: number; manga: Manga } | null>(null);
 
-  const setActiveManga = useStore((state) => state.setActiveManga);
-  const libraryFilter = useStore((state) => state.libraryFilter);
+  const setActiveManga   = useStore((state) => state.setActiveManga);
+  const libraryFilter    = useStore((state) => state.libraryFilter);
   const setLibraryFilter = useStore((state) => state.setLibraryFilter);
-  const settings = useStore((state) => state.settings);
+  const settings         = useStore((state) => state.settings);
   const libraryTagFilter = useStore((state) => state.libraryTagFilter);
   const setLibraryTagFilter = useStore((state) => state.setLibraryTagFilter);
+  const folders          = useStore((state) => state.settings.folders);
 
   useEffect(() => {
-    // Fetch all manga (for downloaded filter on non-library entries) and
-    // library manga (for unreadCount/chapter progress). Merge: library wins.
     Promise.all([
       gql<{ mangas: { nodes: Manga[] } }>(GET_ALL_MANGA),
       gql<{ mangas: { nodes: Manga[] } }>(GET_LIBRARY),
@@ -73,27 +71,47 @@ export default function Library() {
       .finally(() => setLoading(false));
   }, []);
 
-  // Reset visible count when filter/search changes
   useEffect(() => { setVisibleCount(INITIAL_PAGE_SIZE); }, [libraryFilter, search]);
 
+  // Reset filter if the active folder tab gets hidden
+  useEffect(() => {
+    const activeFolder = folders.find((f) => f.id === libraryFilter);
+    if (activeFolder && !activeFolder.showTab) {
+      setLibraryFilter("library");
+    }
+  }, [folders]);
+
+  const isBuiltinFilter = libraryFilter === "all" || libraryFilter === "library" || libraryFilter === "downloaded";
+
   const filtered = useMemo(() => {
     let items = allManga;
 
-    // Apply filter tab
     if (libraryFilter === "library") {
       items = items.filter((m) => m.inLibrary);
     } else if (libraryFilter === "downloaded") {
       items = items.filter((m) => (m.downloadCount ?? 0) > 0);
+    } else if (!isBuiltinFilter) {
+      // folder filter
+      const folder = folders.find((f) => f.id === libraryFilter);
+      if (folder) {
+        items = items.filter((m) => folder.mangaIds.includes(m.id));
+      }
+    }
+
+    // tag filter only applies to library/all/folder views
+    if (libraryTagFilter.length > 0) {
+      items = items.filter((m) =>
+        libraryTagFilter.every((tag) => (m.genre ?? []).includes(tag))
+      );
     }
 
-    // Apply search
     if (search.trim()) {
       const q = search.toLowerCase();
       items = items.filter((m) => m.title.toLowerCase().includes(q));
     }
 
     return items;
-  }, [allManga, libraryFilter, search]);
+  }, [allManga, libraryFilter, search, libraryTagFilter, folders, isBuiltinFilter]);
 
   const visible = filtered.slice(0, visibleCount);
   const hasMore = visibleCount < filtered.length;
@@ -108,10 +126,26 @@ export default function Library() {
     setAllManga((prev) => prev.map((m) => m.id === manga.id ? { ...m, inLibrary: false } : m));
   }
 
+  async function deleteAllDownloads(manga: Manga) {
+    try {
+      const data = await gql<{ chapters: { nodes: Chapter[] } }>(GET_CHAPTERS, { mangaId: manga.id });
+      const downloadedIds = data.chapters.nodes
+        .filter((c) => c.isDownloaded)
+        .map((c) => c.id);
+      if (!downloadedIds.length) return;
+      await gql(DELETE_DOWNLOADED_CHAPTERS, { ids: downloadedIds });
+      setAllManga((prev) =>
+        prev.map((m) => m.id === manga.id ? { ...m, downloadCount: 0 } : m)
+      );
+    } catch (e) {
+      console.error(e);
+    }
+  }
+
   function openCtx(e: React.MouseEvent, m: Manga) {
     e.preventDefault();
     const menuW = 200;
-    const menuH = 96;
+    const menuH = 160;
     const x = Math.min(e.clientX, window.innerWidth - menuW - 8);
     const y = Math.min(e.clientY, window.innerHeight - menuH - 8);
     setCtx({ x, y, manga: m });
@@ -127,25 +161,39 @@ export default function Library() {
       {
         label: m.inLibrary ? "Remove from library" : "Add to library",
         danger: m.inLibrary,
-        onClick: () => m.inLibrary ? removeFromLibrary(m) : gql(UPDATE_MANGA, { id: m.id, inLibrary: true })
-          .then(() => setAllManga((prev) => prev.map((x) => x.id === m.id ? { ...x, inLibrary: true } : x)))
-          .catch(console.error),
+        onClick: () => m.inLibrary
+          ? removeFromLibrary(m)
+          : gql(UPDATE_MANGA, { id: m.id, inLibrary: true })
+              .then(() => setAllManga((prev) => prev.map((x) => x.id === m.id ? { ...x, inLibrary: true } : x)))
+              .catch(console.error),
+      },
+      {
+        label: "Delete all downloads",
+        danger: true,
+        disabled: !(m.downloadCount && m.downloadCount > 0),
+        icon: <Trash size={13} weight="light" />,
+        onClick: () => deleteAllDownloads(m),
       },
     ];
   }
 
-  // All genres present in current library
   const allTags = useMemo(() => {
     const tagSet = new Set<string>();
     allManga.filter((m) => m.inLibrary).forEach((m) => (m.genre ?? []).forEach((g) => tagSet.add(g)));
     return Array.from(tagSet).sort();
   }, [allManga]);
 
-  const counts = useMemo(() => ({
-    all: allManga.length,
-    library: allManga.filter((m) => m.inLibrary).length,
-    downloaded: allManga.filter((m) => (m.downloadCount ?? 0) > 0).length,
-  }), [allManga]);
+  const counts = useMemo(() => {
+    const result: Record<string, number> = {
+      all: allManga.length,
+      library: allManga.filter((m) => m.inLibrary).length,
+      downloaded: allManga.filter((m) => (m.downloadCount ?? 0) > 0).length,
+    };
+    folders.forEach((f) => {
+      result[f.id] = allManga.filter((m) => f.mangaIds.includes(m.id)).length;
+    });
+    return result;
+  }, [allManga, folders]);
 
   if (error) return (
     <div className={s.center}>
@@ -160,7 +208,8 @@ export default function Library() {
         <div className={s.headerLeft}>
           <h1 className={s.heading}>Library</h1>
           <div className={s.tabs}>
-            {(["library", "downloaded", "all"] as LibraryFilter[]).map((f) => (
+            {/* Built-in tabs */}
+            {(["library", "downloaded", "all"] as const).map((f) => (
               <button
                 key={f}
                 className={[s.tab, libraryFilter === f ? s.tabActive : ""].join(" ").trim()}
@@ -176,6 +225,18 @@ export default function Library() {
                 <span className={s.tabCount}>{counts[f]}</span>
               </button>
             ))}
+            {/* Folder tabs — only shown if the folder has showTab enabled */}
+            {folders.filter((f) => f.showTab).map((folder) => (
+              <button
+                key={folder.id}
+                className={[s.tab, libraryFilter === folder.id ? s.tabActive : ""].join(" ").trim()}
+                onClick={() => setLibraryFilter(folder.id)}
+              >
+                <Folder size={11} weight="bold" />
+                {folder.name}
+                <span className={s.tabCount}>{counts[folder.id] ?? 0}</span>
+              </button>
+            ))}
           </div>
         </div>
         <div className={s.searchWrap}>
@@ -189,7 +250,6 @@ export default function Library() {
         </div>
       </div>
 
-
       {/* Tag filter panel */}
       {allTags.length > 0 && (
         <div className={s.tagPanel}>
@@ -233,6 +293,8 @@ export default function Library() {
             ? "No manga saved to library. Browse sources to add some."
             : libraryFilter === "downloaded"
             ? "No downloaded manga."
+            : !isBuiltinFilter
+            ? "No manga in this folder yet. Right-click manga to assign them."
             : "No manga found."}
         </div>
       ) : (
diff --git a/src/components/pages/SeriesDetail.module.css b/src/components/pages/SeriesDetail.module.css
index 46a0efe..a5f6780 100644
--- a/src/components/pages/SeriesDetail.module.css
+++ b/src/components/pages/SeriesDetail.module.css
@@ -693,4 +693,184 @@
   border: 1px solid var(--border-dim);
   display: flex; align-items: center; justify-content: center;
   padding: var(--sp-2);
+}
+
+/* ── Folder picker (icon button in list header) ──────────────────────── */
+.folderPickerWrap {
+  position: relative;
+}
+
+/* Matches dlToggleBtn / viewToggleBtn style */
+.folderPickerBtn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 28px;
+  height: 28px;
+  border-radius: var(--radius-md);
+  border: 1px solid var(--border-dim);
+  color: var(--text-muted);
+  background: none;
+  cursor: pointer;
+  transition: color var(--t-base), border-color var(--t-base), background var(--t-base);
+}
+.folderPickerBtn:hover {
+  color: var(--text-secondary);
+  border-color: var(--border-strong);
+  background: var(--bg-raised);
+}
+/* Active state when manga is assigned to at least one folder */
+.folderPickerBtnActive {
+  color: var(--accent-fg);
+  border-color: var(--accent-dim);
+  background: var(--accent-muted);
+}
+.folderPickerBtnActive:hover {
+  background: var(--accent-muted);
+  border-color: var(--accent);
+  color: var(--accent-fg);
+}
+
+.folderPickerMenu {
+  position: absolute;
+  top: calc(100% + 4px);
+  right: 0;
+  min-width: 180px;
+  background: var(--bg-raised);
+  border: 1px solid var(--border-base);
+  border-radius: var(--radius-md);
+  padding: var(--sp-1);
+  z-index: 200;
+  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
+  animation: scaleIn 0.1s ease both;
+  transform-origin: top right;
+}
+
+.folderPickerEmpty {
+  padding: var(--sp-2) var(--sp-3);
+  font-size: var(--text-xs);
+  color: var(--text-faint);
+}
+
+.folderPickerItem {
+  display: flex;
+  align-items: center;
+  gap: var(--sp-2);
+  width: 100%;
+  padding: 6px var(--sp-3);
+  border-radius: var(--radius-sm);
+  font-size: var(--text-xs);
+  color: var(--text-secondary);
+  background: none;
+  border: none;
+  cursor: pointer;
+  text-align: left;
+  transition: background var(--t-fast), color var(--t-fast);
+}
+.folderPickerItem:hover { background: var(--bg-overlay); }
+.folderPickerItemActive { color: var(--accent-fg); }
+
+.folderPickerItemCheck {
+  width: 12px;
+  font-size: var(--text-xs);
+  color: var(--accent-fg);
+  flex-shrink: 0;
+}
+
+.folderPickerDivider {
+  height: 1px;
+  background: var(--border-dim);
+  margin: var(--sp-1) var(--sp-2);
+}
+
+.folderPickerCreate {
+  display: flex;
+  align-items: center;
+  gap: var(--sp-1);
+  padding: 4px var(--sp-2);
+}
+
+.folderPickerInput {
+  flex: 1;
+  background: var(--bg-overlay);
+  border: 1px solid var(--border-strong);
+  border-radius: var(--radius-sm);
+  padding: 4px 8px;
+  font-size: var(--text-xs);
+  color: var(--text-secondary);
+  outline: none;
+  min-width: 0;
+}
+.folderPickerInput:focus { border-color: var(--border-focus); }
+
+.folderPickerConfirm {
+  font-family: var(--font-ui);
+  font-size: var(--text-2xs);
+  letter-spacing: var(--tracking-wide);
+  padding: 4px 8px;
+  border-radius: var(--radius-sm);
+  border: 1px solid var(--accent-dim);
+  background: var(--accent-muted);
+  color: var(--accent-fg);
+  cursor: pointer;
+  flex-shrink: 0;
+}
+.folderPickerConfirm:disabled { opacity: 0.4; cursor: default; }
+
+.folderPickerCancel {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 22px;
+  height: 22px;
+  border-radius: var(--radius-sm);
+  border: 1px solid transparent;
+  background: none;
+  color: var(--text-faint);
+  cursor: pointer;
+  flex-shrink: 0;
+  transition: color var(--t-base), border-color var(--t-base);
+}
+.folderPickerCancel:hover { color: var(--text-muted); border-color: var(--border-dim); }
+
+.folderPickerNewBtn {
+  width: 100%;
+  padding: 6px var(--sp-3);
+  border-radius: var(--radius-sm);
+  font-size: var(--text-xs);
+  color: var(--text-faint);
+  background: none;
+  border: none;
+  cursor: pointer;
+  text-align: left;
+  transition: color var(--t-fast), background var(--t-fast);
+}
+.folderPickerNewBtn:hover { color: var(--text-secondary); background: var(--bg-overlay); }
+
+/* ── Delete all downloads button (in details section) ─────────────────── */
+.deleteAllBtn {
+  display: flex;
+  align-items: center;
+  gap: var(--sp-2);
+  width: 100%;
+  margin-top: var(--sp-2);
+  padding: 7px var(--sp-3);
+  border-radius: var(--radius-md);
+  font-size: var(--text-xs);
+  color: var(--color-error);
+  background: none;
+  border: 1px solid var(--color-error);
+  cursor: pointer;
+  text-align: left;
+  transition: background var(--t-base);
+}
+.deleteAllBtn:hover:not(:disabled) { background: var(--color-error-bg); }
+.deleteAllBtn:disabled { opacity: 0.4; cursor: default; }
+
+/* ── Danger item in dl dropdown ─────────────────────────────────────── */
+.dlItemDanger {
+  color: var(--color-error) !important;
+}
+.dlItemDanger:hover:not(:disabled) {
+  background: var(--color-error-bg) !important;
 }
\ No newline at end of file
diff --git a/src/components/pages/SeriesDetail.tsx b/src/components/pages/SeriesDetail.tsx
index 4f8cd9d..9ce8ada 100644
--- a/src/components/pages/SeriesDetail.tsx
+++ b/src/components/pages/SeriesDetail.tsx
@@ -1,9 +1,9 @@
-import { useEffect, useState, useMemo, useCallback } from "react";
+import { useEffect, useState, useMemo, useCallback, useRef } from "react";
 import {
   ArrowLeft, BookmarkSimple, Download, CheckCircle,
   ArrowSquareOut, BookOpen, CircleNotch, Play,
   SortAscending, SortDescending, CaretDown, ArrowsClockwise,
-  List, SquaresFour,
+  List, SquaresFour, FolderSimplePlus, X, Trash,
 } from "@phosphor-icons/react";
 import { gql, thumbUrl } from "../../lib/client";
 import {
@@ -33,6 +33,107 @@ interface CtxState {
 
 const CHAPTERS_PER_PAGE = 25;
 
+// ── Folder picker (icon button for list header) ───────────────────────────────
+function FolderPicker({ mangaId }: { mangaId: number }) {
+  const [open, setOpen] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+  const folders               = useStore((st) => st.settings.folders);
+  const assignMangaToFolder   = useStore((st) => st.assignMangaToFolder);
+  const removeMangaFromFolder = useStore((st) => st.removeMangaFromFolder);
+  const addFolder             = useStore((st) => st.addFolder);
+  const [newName, setNewName]   = useState("");
+  const [creating, setCreating] = useState(false);
+
+  const assigned = folders.filter((f) => f.mangaIds.includes(mangaId));
+  const hasAssigned = assigned.length > 0;
+
+  useEffect(() => {
+    if (!open) return;
+    const handler = (e: MouseEvent) => {
+      if (ref.current && !ref.current.contains(e.target as Node)) {
+        setOpen(false);
+        setCreating(false);
+        setNewName("");
+      }
+    };
+    document.addEventListener("mousedown", handler);
+    return () => document.removeEventListener("mousedown", handler);
+  }, [open]);
+
+  function handleCreate() {
+    const name = newName.trim();
+    if (!name) return;
+    const id = addFolder(name);
+    assignMangaToFolder(id, mangaId);
+    setNewName("");
+    setCreating(false);
+  }
+
+  return (
+    <div className={s.folderPickerWrap} ref={ref}>
+      <button
+        className={[s.folderPickerBtn, hasAssigned ? s.folderPickerBtnActive : ""].join(" ")}
+        onClick={() => setOpen((p) => !p)}
+        title={hasAssigned ? `Folders: ${assigned.map((f) => f.name).join(", ")}` : "Add to folder"}
+      >
+        <FolderSimplePlus size={14} weight={hasAssigned ? "fill" : "light"} />
+      </button>
+
+      {open && (
+        <div className={s.folderPickerMenu}>
+          {folders.length === 0 && !creating && (
+            <p className={s.folderPickerEmpty}>No folders yet</p>
+          )}
+          {folders.map((folder) => {
+            const isIn = folder.mangaIds.includes(mangaId);
+            return (
+              <button
+                key={folder.id}
+                className={[s.folderPickerItem, isIn ? s.folderPickerItemActive : ""].join(" ")}
+                onClick={() =>
+                  isIn
+                    ? removeMangaFromFolder(folder.id, mangaId)
+                    : assignMangaToFolder(folder.id, mangaId)
+                }
+              >
+                <span className={s.folderPickerItemCheck}>{isIn ? "✓" : ""}</span>
+                {folder.name}
+              </button>
+            );
+          })}
+          <div className={s.folderPickerDivider} />
+          {creating ? (
+            <div className={s.folderPickerCreate}>
+              <input
+                autoFocus
+                className={s.folderPickerInput}
+                placeholder="Folder name…"
+                value={newName}
+                onChange={(e) => setNewName(e.target.value)}
+                onKeyDown={(e) => {
+                  if (e.key === "Enter") handleCreate();
+                  if (e.key === "Escape") { setCreating(false); setNewName(""); }
+                }}
+              />
+              <button className={s.folderPickerConfirm} onClick={handleCreate} disabled={!newName.trim()}>
+                Add
+              </button>
+              <button className={s.folderPickerCancel} onClick={() => { setCreating(false); setNewName(""); }}>
+                <X size={12} weight="light" />
+              </button>
+            </div>
+          ) : (
+            <button className={s.folderPickerNewBtn} onClick={() => setCreating(true)}>
+              + New folder
+            </button>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
+
+// ── Main component ────────────────────────────────────────────────────────────
 export default function SeriesDetail() {
   const activeManga     = useStore((state) => state.activeManga);
   const setActiveManga  = useStore((state) => state.setActiveManga);
@@ -54,6 +155,7 @@ export default function SeriesDetail() {
   const [jumpOpen, setJumpOpen]         = useState(false);
   const [jumpInput, setJumpInput]       = useState("");
   const [viewMode, setViewMode]         = useState<"list" | "grid">("list");
+  const [deletingAll, setDeletingAll]   = useState(false);
 
   const sortDir = settings.chapterSortDir;
 
@@ -104,15 +206,14 @@ export default function SeriesDetail() {
   const readCount = chapters.filter((c) => c.isRead).length;
   const totalCount = chapters.length;
   const progressPct = totalCount > 0 ? (readCount / totalCount) * 100 : 0;
+  const downloadedCount = chapters.filter((c) => c.isDownloaded).length;
 
   const continueChapter = useMemo(() => {
     if (!chapters.length) return null;
     const asc = [...chapters].sort((a, b) => a.sourceOrder - b.sourceOrder);
     const anyRead = asc.some((c) => c.isRead);
-    // In-progress: started but not finished
     const inProgress = asc.find((c) => !c.isRead && (c.lastPageRead ?? 0) > 0);
     if (inProgress) return { chapter: inProgress, type: "continue" as const };
-    // If any chapter is read, user is continuing — find next unread
     const firstUnread = asc.find((c) => !c.isRead);
     if (firstUnread) return { chapter: firstUnread, type: anyRead ? "continue" : "start" as const };
     return { chapter: asc[0], type: "reread" as const };
@@ -153,6 +254,15 @@ export default function SeriesDetail() {
     setChapters((prev) => prev.map((c) => c.id === chapterId ? { ...c, isDownloaded: false } : c));
   }
 
+  async function deleteAllDownloads() {
+    const ids = chapters.filter((c) => c.isDownloaded).map((c) => c.id);
+    if (!ids.length) return;
+    setDeletingAll(true);
+    await gql(DELETE_DOWNLOADED_CHAPTERS, { ids }).catch(console.error);
+    setChapters((prev) => prev.map((c) => ({ ...c, isDownloaded: false })));
+    setDeletingAll(false);
+  }
+
   async function enqueueMultiple(chapterIds: number[]) {
     await gql(ENQUEUE_CHAPTERS_DOWNLOAD, { chapterIds }).catch(console.error);
     if (activeManga) loadChapters(activeManga.id);
@@ -279,6 +389,8 @@ export default function SeriesDetail() {
           )}
         </div>
 
+        {/* Folder picker moved to chapter list header */}
+
         {continueChapter && (
           <button
             className={s.readBtn}
@@ -327,6 +439,18 @@ export default function SeriesDetail() {
                   <ArrowsClockwise size={12} weight="light" />
                   Switch source
                 </button>
+
+                {/* Delete all downloads */}
+                {downloadedCount > 0 && (
+                  <button
+                    className={s.deleteAllBtn}
+                    onClick={deleteAllDownloads}
+                    disabled={deletingAll}
+                  >
+                    <Trash size={12} weight="light" />
+                    {deletingAll ? "Deleting…" : `Delete all downloads (${downloadedCount})`}
+                  </button>
+                )}
               </div>
             )}
           </div>
@@ -365,6 +489,9 @@ export default function SeriesDetail() {
           </div>
 
           <div className={s.listHeaderRight}>
+            {/* Folder picker */}
+            {activeManga && <FolderPicker mangaId={activeManga.id} />}
+
             {/* Jump to chapter */}
             {chapters.length > 1 && (
               <div className={s.jumpWrap}>
@@ -440,6 +567,18 @@ export default function SeriesDetail() {
                       <span>Download all</span>
                       <span className={s.dlItemSub}>{sortedChapters.filter((c) => !c.isDownloaded).length} not downloaded</span>
                     </button>
+                    {downloadedCount > 0 && (
+                      <>
+                        <div style={{ height: 1, background: "var(--border-dim)", margin: "var(--sp-1) var(--sp-2)" }} />
+                        <button className={[s.dlItem, s.dlItemDanger].join(" ")}
+                          onClick={() => { deleteAllDownloads(); setDlOpen(false); }}
+                          disabled={deletingAll}
+                        >
+                          <span>{deletingAll ? "Deleting…" : "Delete all downloads"}</span>
+                          <span className={s.dlItemSub}>{downloadedCount} downloaded</span>
+                        </button>
+                      </>
+                    )}
                   </div>
                 )}
               </div>
diff --git a/src/components/settings/Settings.module.css b/src/components/settings/Settings.module.css
index a1d4ac4..6af6523 100644
--- a/src/components/settings/Settings.module.css
+++ b/src/components/settings/Settings.module.css
@@ -371,4 +371,91 @@
   transition: background var(--t-base);
 }
 .dangerBtn:hover:not(:disabled) { background: var(--color-error-bg); }
-.dangerBtn:disabled { opacity: 0.3; cursor: default; }
\ No newline at end of file
+.dangerBtn:disabled { opacity: 0.3; cursor: default; }
+
+/* ── Folder management (Settings FoldersTab) ────────────────────────── */
+.folderCreateRow {
+  display: flex;
+  align-items: center;
+  gap: var(--sp-2);
+  padding: var(--sp-1) var(--sp-3) var(--sp-3);
+}
+
+.folderCreateBtn {
+  display: flex;
+  align-items: center;
+  gap: var(--sp-1);
+  font-family: var(--font-ui);
+  font-size: var(--text-xs);
+  letter-spacing: var(--tracking-wide);
+  padding: 5px 12px;
+  border-radius: var(--radius-md);
+  border: 1px solid var(--border-strong);
+  background: none;
+  color: var(--text-muted);
+  cursor: pointer;
+  flex-shrink: 0;
+  transition: color var(--t-base), border-color var(--t-base);
+}
+.folderCreateBtn:hover:not(:disabled) {
+  color: var(--accent-fg);
+  border-color: var(--accent);
+}
+.folderCreateBtn:disabled { opacity: 0.3; cursor: default; }
+
+.folderList {
+  display: flex;
+  flex-direction: column;
+  gap: 1px;
+}
+
+.folderRow {
+  display: flex;
+  align-items: center;
+  gap: var(--sp-2);
+  padding: 9px var(--sp-3);
+  border-radius: var(--radius-md);
+  transition: background var(--t-fast);
+}
+.folderRow:hover { background: var(--bg-raised); }
+
+.folderRowName {
+  flex: 1;
+  font-size: var(--text-sm);
+  color: var(--text-secondary);
+}
+
+.folderRowCount {
+  font-family: var(--font-ui);
+  font-size: var(--text-xs);
+  color: var(--text-faint);
+  letter-spacing: var(--tracking-wide);
+  margin-right: var(--sp-1);
+}
+
+.folderTabToggle {
+  font-family: var(--font-ui);
+  font-size: var(--text-2xs);
+  letter-spacing: var(--tracking-wide);
+  padding: 3px 8px;
+  border-radius: var(--radius-sm);
+  border: 1px solid var(--border-dim);
+  background: none;
+  color: var(--text-faint);
+  cursor: pointer;
+  flex-shrink: 0;
+  transition: color var(--t-base), border-color var(--t-base), background var(--t-base);
+}
+.folderTabToggle:hover {
+  color: var(--text-muted);
+  border-color: var(--border-strong);
+}
+.folderTabToggleOn {
+  background: var(--accent-muted);
+  border-color: var(--accent-dim);
+  color: var(--accent-fg);
+}
+.folderTabToggleOn:hover {
+  background: var(--accent-muted);
+  color: var(--accent-fg);
+}
\ No newline at end of file
diff --git a/src/components/settings/Settings.tsx b/src/components/settings/Settings.tsx
index 5774cb2..b465e8b 100644
--- a/src/components/settings/Settings.tsx
+++ b/src/components/settings/Settings.tsx
@@ -1,14 +1,15 @@
 import { useEffect, useRef, useState, useCallback } from "react";
-import { X, Book, Image, Sliders, Info, Keyboard, Gear, HardDrives } from "@phosphor-icons/react";
+import { X, Book, Image, Sliders, Info, Keyboard, Gear, HardDrives, FolderSimple, Plus, Pencil, Trash } from "@phosphor-icons/react";
 import { invoke } from "@tauri-apps/api/core";
 import { gql } from "../../lib/client";
 import { GET_DOWNLOADS_PATH } from "../../lib/queries";
 import { useStore } from "../../store";
+import type { Folder } from "../../store";
 import { KEYBIND_LABELS, DEFAULT_KEYBINDS, eventToKeybind, type Keybinds } from "../../lib/keybinds";
 import type { Settings, FitMode } from "../../store";
 import s from "./Settings.module.css";
 
-type Tab = "general" | "reader" | "library" | "performance" | "keybinds" | "storage" | "about";
+type Tab = "general" | "reader" | "library" | "performance" | "keybinds" | "storage" | "folders" | "about";
 
 const TABS: { id: Tab; label: string; icon: React.ReactNode }[] = [
   { id: "general",     label: "General",     icon: <Gear size={14} weight="light" /> },
@@ -17,6 +18,7 @@ const TABS: { id: Tab; label: string; icon: React.ReactNode }[] = [
   { id: "performance", label: "Performance", icon: <Sliders size={14} weight="light" /> },
   { id: "keybinds",    label: "Keybinds",    icon: <Keyboard size={14} weight="light" /> },
   { id: "storage",     label: "Storage",     icon: <HardDrives size={14} weight="light" /> },
+  { id: "folders",     label: "Folders",     icon: <FolderSimple size={14} weight="light" /> },
   { id: "about",       label: "About",       icon: <Info size={14} weight="light" /> },
 ];
 
@@ -566,6 +568,127 @@ function StorageTab({ settings, update }: { settings: Settings; update: (p: Part
   );
 }
 
+// ── Folders tab ───────────────────────────────────────────────────────────────
+
+function FoldersTab() {
+  const folders            = useStore((s) => s.settings.folders);
+  const addFolder          = useStore((s) => s.addFolder);
+  const removeFolder       = useStore((s) => s.removeFolder);
+  const renameFolder       = useStore((s) => s.renameFolder);
+  const toggleFolderTab    = useStore((s) => s.toggleFolderTab);
+
+  const [newName, setNewName]         = useState("");
+  const [editingId, setEditingId]     = useState<string | null>(null);
+  const [editingName, setEditingName] = useState("");
+
+  function handleCreate() {
+    const name = newName.trim();
+    if (!name) return;
+    addFolder(name);
+    setNewName("");
+  }
+
+  function startEdit(folder: Folder) {
+    setEditingId(folder.id);
+    setEditingName(folder.name);
+  }
+
+  function commitEdit() {
+    if (editingId && editingName.trim()) {
+      renameFolder(editingId, editingName.trim());
+    }
+    setEditingId(null);
+    setEditingName("");
+  }
+
+  return (
+    <div className={s.panel}>
+      <div className={s.section}>
+        <p className={s.sectionTitle}>Manage Folders</p>
+        <p className={s.toggleDesc} style={{ padding: "0 var(--sp-3) var(--sp-3)", display: "block" }}>
+          Assign manga to folders from the series detail page. Toggle the tab icon to show a folder as a filter tab in the library.
+        </p>
+
+        {/* Create new folder */}
+        <div className={s.folderCreateRow}>
+          <input
+            className={s.textInput}
+            placeholder="New folder name…"
+            value={newName}
+            onChange={(e) => setNewName(e.target.value)}
+            onKeyDown={(e) => { if (e.key === "Enter") handleCreate(); }}
+            style={{ flex: 1, width: "auto" }}
+          />
+          <button
+            className={s.folderCreateBtn}
+            onClick={handleCreate}
+            disabled={!newName.trim()}
+          >
+            <Plus size={13} weight="bold" />
+            Create
+          </button>
+        </div>
+
+        {/* Folder list */}
+        {folders.length === 0 ? (
+          <p className={s.storageLoading}>No folders yet. Create one above.</p>
+        ) : (
+          <div className={s.folderList}>
+            {folders.map((folder) => (
+              <div key={folder.id} className={s.folderRow}>
+                {editingId === folder.id ? (
+                  <>
+                    <input
+                      autoFocus
+                      className={s.textInput}
+                      value={editingName}
+                      onChange={(e) => setEditingName(e.target.value)}
+                      onKeyDown={(e) => {
+                        if (e.key === "Enter") commitEdit();
+                        if (e.key === "Escape") { setEditingId(null); }
+                      }}
+                      onBlur={commitEdit}
+                      style={{ flex: 1, width: "auto" }}
+                    />
+                    <button className={s.kbReset} onClick={commitEdit} title="Save">✓</button>
+                  </>
+                ) : (
+                  <>
+                    <FolderSimple size={14} weight="light" style={{ color: "var(--text-faint)", flexShrink: 0 }} />
+                    <span className={s.folderRowName}>{folder.name}</span>
+                    <span className={s.folderRowCount}>{folder.mangaIds.length} manga</span>
+                    {/* Show as tab toggle */}
+                    <button
+                      className={[s.folderTabToggle, folder.showTab ? s.folderTabToggleOn : ""].join(" ")}
+                      onClick={() => toggleFolderTab(folder.id)}
+                      title={folder.showTab ? "Shown as library tab — click to hide" : "Click to show as library tab"}
+                    >
+                      {folder.showTab ? "Tab on" : "Tab off"}
+                    </button>
+                    <button
+                      className={s.kbReset}
+                      onClick={() => startEdit(folder)}
+                      title="Rename"
+                    >
+                      <Pencil size={12} weight="light" />
+                    </button>
+                    <button
+                      className={[s.kbReset, s.folderDeleteBtn].join(" ")}
+                      onClick={() => removeFolder(folder.id)}
+                      title="Delete folder"
+                    >
+                      <Trash size={12} weight="light" />
+                    </button>
+                  </>
+                )}
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
 
 function AboutTab() {
   return (
@@ -594,7 +717,6 @@ export default function SettingsModal() {
   const backdropRef        = useRef<HTMLDivElement>(null);
   const contentBodyRef     = useRef<HTMLDivElement>(null);
 
-  // Scroll to top on every tab switch
   useEffect(() => {
     contentBodyRef.current?.scrollTo({ top: 0 });
   }, [tab]);
@@ -638,6 +760,7 @@ export default function SettingsModal() {
             {tab === "performance" && <PerformanceTab settings={settings} update={updateSettings} />}
             {tab === "keybinds"    && <KeybindsTab    settings={settings} update={updateSettings} reset={resetKeybinds} />}
             {tab === "storage"     && <StorageTab     settings={settings} update={updateSettings} />}
+            {tab === "folders"     && <FoldersTab />}
             {tab === "about"       && <AboutTab />}
           </div>
         </div>
diff --git a/src/store/index.ts b/src/store/index.ts
index e0e9cb0..f69526a 100644
--- a/src/store/index.ts
+++ b/src/store/index.ts
@@ -5,7 +5,7 @@ import { DEFAULT_KEYBINDS, type Keybinds } from "../lib/keybinds";
 
 export type PageStyle        = "single" | "double" | "longstrip";
 export type FitMode          = "width" | "height" | "screen" | "original";
-export type LibraryFilter    = "all" | "library" | "downloaded";
+export type LibraryFilter    = "all" | "library" | "downloaded" | string; // string = folder id
 export type NavPage          = "library" | "sources" | "downloads" | "extensions" | "history" | "search";
 export type ReadingDirection = "ltr" | "rtl";
 export type ChapterSortDir   = "desc" | "asc";
@@ -26,6 +26,13 @@ export interface ActiveDownload {
   progress: number;
 }
 
+export interface Folder {
+  id: string;
+  name: string;
+  mangaIds: number[];
+  showTab: boolean;
+}
+
 export interface Settings {
   pageStyle: PageStyle;
   readingDirection: ReadingDirection;
@@ -51,6 +58,7 @@ export interface Settings {
   preferredExtensionLang: string;
   keybinds: Keybinds;
   storageLimitGb: number | null;
+  folders: Folder[];
 }
 
 export const DEFAULT_SETTINGS: Settings = {
@@ -78,6 +86,7 @@ export const DEFAULT_SETTINGS: Settings = {
   preferredExtensionLang: "en",
   keybinds: DEFAULT_KEYBINDS,
   storageLimitGb: null,
+  folders: [],
 };
 
 interface Store {
@@ -110,11 +119,23 @@ interface Store {
   settings: Settings;
   updateSettings: (patch: Partial<Settings>) => void;
   resetKeybinds: () => void;
+  // Folder helpers
+  addFolder: (name: string) => string;
+  removeFolder: (id: string) => void;
+  renameFolder: (id: string, name: string) => void;
+  toggleFolderTab: (id: string) => void;
+  assignMangaToFolder: (folderId: string, mangaId: number) => void;
+  removeMangaFromFolder: (folderId: string, mangaId: number) => void;
+  getMangaFolders: (mangaId: number) => Folder[];
+}
+
+function genId(): string {
+  return Math.random().toString(36).slice(2, 10);
 }
 
 export const useStore = create<Store>()(
   persist(
-    (set) => ({
+    (set, get) => ({
       navPage: "library",
       setNavPage: (navPage) => set({ navPage }),
       activeManga: null,
@@ -152,6 +173,63 @@ export const useStore = create<Store>()(
         set((s) => ({ settings: { ...s.settings, ...patch } })),
       resetKeybinds: () =>
         set((s) => ({ settings: { ...s.settings, keybinds: DEFAULT_KEYBINDS } })),
+
+      // ── Folder actions ──────────────────────────────────────────────────────
+      addFolder: (name) => {
+        const id = genId();
+        set((s) => ({
+          settings: {
+            ...s.settings,
+            folders: [...s.settings.folders, { id, name: name.trim(), mangaIds: [], showTab: false }],
+          },
+        }));
+        return id;
+      },
+      removeFolder: (id) =>
+        set((s) => ({
+          settings: {
+            ...s.settings,
+            folders: s.settings.folders.filter((f) => f.id !== id),
+          },
+        })),
+      renameFolder: (id, name) =>
+        set((s) => ({
+          settings: {
+            ...s.settings,
+            folders: s.settings.folders.map((f) => f.id === id ? { ...f, name: name.trim() } : f),
+          },
+        })),
+      toggleFolderTab: (id) =>
+        set((s) => ({
+          settings: {
+            ...s.settings,
+            folders: s.settings.folders.map((f) => f.id === id ? { ...f, showTab: !f.showTab } : f),
+          },
+        })),
+      assignMangaToFolder: (folderId, mangaId) =>
+        set((s) => ({
+          settings: {
+            ...s.settings,
+            folders: s.settings.folders.map((f) =>
+              f.id === folderId && !f.mangaIds.includes(mangaId)
+                ? { ...f, mangaIds: [...f.mangaIds, mangaId] }
+                : f
+            ),
+          },
+        })),
+      removeMangaFromFolder: (folderId, mangaId) =>
+        set((s) => ({
+          settings: {
+            ...s.settings,
+            folders: s.settings.folders.map((f) =>
+              f.id === folderId
+                ? { ...f, mangaIds: f.mangaIds.filter((id) => id !== mangaId) }
+                : f
+            ),
+          },
+        })),
+      getMangaFolders: (mangaId) =>
+        get().settings.folders.filter((f) => f.mangaIds.includes(mangaId)),
     }),
     {
       name: "moku-store",
@@ -167,6 +245,7 @@ export const useStore = create<Store>()(
         settings: {
           ...DEFAULT_SETTINGS,
           ...(persisted as any)?.settings,
+          folders: (persisted as any)?.settings?.folders ?? [],
           keybinds: {
             ...DEFAULT_KEYBINDS,
             ...(persisted as any)?.settings?.keybinds,