diff --git a/frontend/src/components/TopBar.tsx b/frontend/src/components/TopBar.tsx
deleted file mode 100644
index 9f8dea3..0000000
--- a/frontend/src/components/TopBar.tsx
+++ /dev/null
@@ -1,64 +0,0 @@
-import type { ReactNode } from "react";
-import { Link, NavLink } from "react-router-dom";
-import { useAuth } from "../auth/AuthContext";
-import { IconBooks, IconFolder, IconLogout, IconUser } from "./icons";
-import { btnGhost } from "./ui";
-
-export function TopBar({ right }: { right?: ReactNode }) {
-  const { user, isAdmin, logout } = useAuth();
-  return (
-    <header className="sticky top-0 z-30 flex shrink-0 items-center gap-1 border-b border-white/[0.06] bg-stone-950/80 px-4 py-2.5 backdrop-blur-md sm:px-6">
-      <Link
-        to="/"
-        className="flex shrink-0 items-center gap-2 rounded-lg pr-3 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-amber-500"
-      >
-        <span className="grid size-7 place-items-center rounded-lg bg-linear-to-br from-amber-500 to-orange-600 text-stone-950 shadow-md shadow-amber-500/25">
-          <IconBooks className="size-4.5" />
-        </span>
-        <span className="font-serif text-lg font-semibold tracking-wide">
-          Book<span className="text-amber-400">Lib</span>
-        </span>
-      </Link>
-      {isAdmin && (
-        <nav aria-label="管理" className="ml-2 hidden items-center gap-1 sm:flex">
-          <TabLink to="/admin/users">
-            <IconUser className="size-4" />
-            用户
-          </TabLink>
-          <TabLink to="/admin/libraries">
-            <IconFolder className="size-4" />
-            库管理
-          </TabLink>
-        </nav>
-      )}
-      <div className="ml-auto flex items-center gap-2 sm:gap-3">
-        {right}
-        <span className="flex items-center gap-2 rounded-full bg-white/[0.05] py-1 pl-1 pr-3 text-sm text-stone-300 ring-1 ring-white/[0.07]">
-          <span className="grid size-6 shrink-0 place-items-center rounded-full bg-amber-500/20 text-[11px] font-semibold text-amber-300 ring-1 ring-amber-500/30">
-            {Array.from(user?.username ?? "?")[0]?.toUpperCase()}
-          </span>
-          <span className="hidden max-w-28 truncate sm:inline">{user?.username}</span>
-          {isAdmin && <span className="hidden rounded bg-amber-500/15 px-1 text-[10px] font-semibold text-amber-300 md:inline">admin</span>}
-        </span>
-        <button className={btnGhost} onClick={logout} aria-label="退出登录" title="退出登录">
-          <IconLogout className="size-4.5" />
-        </button>
-      </div>
-    </header>
-  );
-}
-
-function TabLink({ to, children }: { to: string; children: ReactNode }) {
-  return (
-    <NavLink
-      to={to}
-      className={({ isActive }) =>
-        `flex items-center gap-1.5 rounded-full px-3 py-1.5 text-sm transition-colors focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-amber-500 ${
-          isActive ? "bg-white/[0.09] text-stone-100 ring-1 ring-white/10" : "text-stone-400 hover:bg-white/[0.06] hover:text-stone-100"
-        }`
-      }
-    >
-      {children}
-    </NavLink>
-  );
-}
diff --git a/frontend/src/components/icons.tsx b/frontend/src/components/icons.tsx
index a5a678c..f8e5467 100644
--- a/frontend/src/components/icons.tsx
+++ b/frontend/src/components/icons.tsx
@@ -1,116 +1,15 @@
 import type { SVGProps } from "react";
 
-// 统一 1.7px 描边的线性图标(Phosphor 风格),尺寸由外部 className 控制
 function Svg({ children, ...p }: SVGProps<SVGSVGElement>) {
   return (
-    <svg
-      viewBox="0 0 24 24"
-      fill="none"
-      stroke="currentColor"
-      strokeWidth={1.7}
-      strokeLinecap="round"
-      strokeLinejoin="round"
-      aria-hidden="true"
-      {...p}
-    >
+    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={1.7} strokeLinecap="round" strokeLinejoin="round" aria-hidden="true" {...p}>
       {children}
     </svg>
   );
 }
 
-type P = SVGProps<SVGSVGElement>;
-
-export const IconBooks = (p: P) => (
-  <Svg {...p}>
-    <path d="M4 5.5A1.5 1.5 0 0 1 5.5 4H10a1.5 1.5 0 0 1 1.5 1.5V18a2 2 0 0 0-2-2H5.5A1.5 1.5 0 0 1 4 14.5v-9Z" />
-    <path d="M13 8h4.5A1.5 1.5 0 0 1 19 9.5v8A1.5 1.5 0 0 1 17.5 19H13" />
-    <path d="M7 4v12M16 12.5v4" />
-  </Svg>
-);
-
-export const IconSearch = (p: P) => (
-  <Svg {...p}>
-    <circle cx="11" cy="11" r="6.5" />
-    <path d="m16 16 4 4" />
-  </Svg>
-);
-
-export const IconRefresh = (p: P) => (
-  <Svg {...p}>
-    <path d="M20 12a8 8 0 1 1-2.34-5.66" />
-    <path d="M20 4v4.5h-4.5" />
-  </Svg>
-);
-
-export const IconScan = (p: P) => (
-  <Svg {...p}>
-    <path d="M4 8V5.5A1.5 1.5 0 0 1 5.5 4H8M16 4h2.5A1.5 1.5 0 0 1 20 5.5V8M20 16v2.5a1.5 1.5 0 0 1-1.5 1.5H16M8 20H5.5A1.5 1.5 0 0 1 4 18.5V16" />
-    <path d="M7 12h10" />
-  </Svg>
-);
-
-export const IconX = (p: P) => (
-  <Svg {...p}>
-    <path d="m6 6 12 12M18 6 6 18" />
-  </Svg>
-);
-
-export const IconLogout = (p: P) => (
-  <Svg {...p}>
-    <path d="M14 4h4.5A1.5 1.5 0 0 1 20 5.5v13a1.5 1.5 0 0 1-1.5 1.5H14" />
-    <path d="M10 8 6 12l4 4M6 12h10" />
-  </Svg>
-);
-
-export const IconArrowLeft = (p: P) => (
+export const IconArrowLeft = (p: SVGProps<SVGSVGElement>) => (
   <Svg {...p}>
     <path d="M20 12H4m0 0 6-6m-6 6 6 6" />
   </Svg>
 );
-
-export const IconBookOpen = (p: P) => (
-  <Svg {...p}>
-    <path d="M12 6.5C10.5 5 8.5 4.5 4 4.5v13c4.5 0 6.5.5 8 2 1.5-1.5 3.5-2 8-2v-13c-4.5 0-6.5.5-8 2Z" />
-    <path d="M12 6.5v13" />
-  </Svg>
-);
-
-export const IconUser = (p: P) => (
-  <Svg {...p}>
-    <circle cx="12" cy="8" r="3.5" />
-    <path d="M5 19.5c1.2-3 3.7-4.5 7-4.5s5.8 1.5 7 4.5" />
-  </Svg>
-);
-
-export const IconLock = (p: P) => (
-  <Svg {...p}>
-    <rect x="5.5" y="10.5" width="13" height="9" rx="1.5" />
-    <path d="M8.5 10.5V8a3.5 3.5 0 0 1 7 0v2.5M12 14v2.5" />
-  </Svg>
-);
-
-export const IconCheck = (p: P) => (
-  <Svg {...p}>
-    <path d="m5 12.5 4.5 4.5L19 7" />
-  </Svg>
-);
-
-export const IconAlert = (p: P) => (
-  <Svg {...p}>
-    <circle cx="12" cy="12" r="8.5" />
-    <path d="M12 7.5V13m0 3.5v.01" />
-  </Svg>
-);
-
-export const IconClock = (p: P) => (
-  <Svg {...p}>
-    <circle cx="12" cy="12" r="8.5" />
-    <path d="M12 7.5V12l3 2" />
-  </Svg>
-);
-
-export const IconFolder = (p: P) => (
-  <Svg {...p}>
-    <path d="M4 6.5A1.5 1.5 0 0 1 5.5 5h3.2a1.5 1.5 0 0 1 1.2.6l.9 1.2a1.5 1.5 0 0 0 1.2.6h6.5A1.5 1.5 0 0 1 20 9.5v8a1.5 1.5 0 0 1-1.5 1.5h-13A1.5 1.5 0 0 1 4 17.5v-11Z" />
-  </Svg>
-);
diff --git a/frontend/src/components/ui.ts b/frontend/src/components/ui.ts
index 29a98f7..4de5654 100644
--- a/frontend/src/components/ui.ts
+++ b/frontend/src/components/ui.ts
@@ -4,18 +4,8 @@ export { formatSize } from "../lib/format"; // deprecated: phase-2 随阅读器
 
 export const btn =
   "inline-flex items-center gap-1.5 rounded-lg bg-white/[0.06] px-3 py-1.5 text-sm ring-1 ring-white/10 transition-colors hover:bg-white/[0.11] focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-amber-500 active:bg-white/[0.15] disabled:cursor-not-allowed disabled:opacity-50";
-export const btnPrimary =
-  "inline-flex items-center gap-1.5 rounded-lg bg-amber-500 px-3 py-1.5 text-sm font-medium text-stone-950 shadow-md shadow-amber-500/20 transition-colors hover:bg-amber-400 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-amber-500 active:bg-amber-300 disabled:cursor-not-allowed disabled:opacity-50";
 export const btnGhost =
   "inline-flex items-center gap-1.5 rounded-lg px-2.5 py-1.5 text-sm text-stone-400 transition-colors hover:bg-white/[0.07] hover:text-stone-100 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-amber-500";
-export const input =
-  "rounded-lg bg-white/[0.04] px-3 py-1.5 text-sm ring-1 ring-white/10 outline-none transition placeholder:text-stone-500 focus:bg-white/[0.06] focus:ring-2 focus:ring-amber-500/60";
-export const card = "rounded-xl bg-stone-900/70 ring-1 ring-white/[0.07]";
-
-// 库/筛选分段 pill
-export const pill =
-  "rounded-full px-3.5 py-1.5 text-sm text-stone-400 ring-1 ring-transparent transition-colors hover:bg-white/[0.07] hover:text-stone-100 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-amber-500";
-export const pillActive = "bg-amber-500/15 text-amber-300 ring-amber-500/30 hover:bg-amber-500/20 hover:text-amber-200";
 
 // 格式徽章:按类型着色,色彩之外始终伴随文字,不依赖颜色单独传义
 export const FORMAT_BADGE: Record<Format, string> = {
diff --git a/frontend/src/pages/admin/Libraries.tsx b/frontend/src/pages/admin/Libraries.tsx
index 226f3a8..aeffaa2 100644
--- a/frontend/src/pages/admin/Libraries.tsx
+++ b/frontend/src/pages/admin/Libraries.tsx
@@ -1,9 +1,12 @@
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
-import { useRef, useState, type FormEvent } from "react";
+import { useRef, useState, type DragEvent, type FormEvent } from "react";
+import { RefreshCw, Upload } from "lucide-react";
 import { api } from "../../api/client";
-import { TopBar } from "../../components/TopBar";
 import { toast } from "../../components/Toaster";
-import { btn, btnPrimary, card, input } from "../../components/ui";
+import { Button } from "@/components/ui/button";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Input } from "@/components/ui/input";
+import { Skeleton } from "@/components/ui/skeleton";
 
 export default function AdminLibraries() {
   const qc = useQueryClient();
@@ -30,10 +33,10 @@ export default function AdminLibraries() {
   });
 
   async function onFiles(libId: number, list: FileList | null) {
-    const files = Array.from(list ?? []); // FileList 是活引用,onChange 里 input.value="" 会清空它,必须先快照
+    const files = Array.from(list ?? []); // FileList 活引用,先快照
     if (!files.length) return;
     try {
-      for (const f of files) await api.uploadBook(libId, f); // 串行,单个失败即止并报错
+      for (const f of files) await api.uploadBook(libId, f);
       toast("ok", `已上传 ${files.length} 个文件,等待 scanner 收编`);
       void qc.invalidateQueries({ queryKey: ["books"] });
       setTimeout(() => void qc.invalidateQueries({ queryKey: ["books"] }), 5000);
@@ -42,63 +45,68 @@ export default function AdminLibraries() {
     }
   }
 
+  function onDrop(e: DragEvent, libId: number) {
+    e.preventDefault();
+    void onFiles(libId, e.dataTransfer.files);
+  }
+
   function submit(e: FormEvent) {
     e.preventDefault();
     create.mutate();
   }
 
+  const libs = libsQ.data ?? [];
   return (
-    <div className="flex h-full flex-col">
-      <TopBar />
-      <div className="flex-1 overflow-y-auto p-4">
-        <h1 className="mb-4 text-lg font-semibold">库管理</h1>
-        <form onSubmit={submit} className={`${card} mb-6 flex max-w-2xl flex-wrap items-center gap-3 p-4`}>
-          <input
-            className={input + " flex-1"}
-            placeholder="库名(如 comics,服务端目录自动落在 BOOKS_DIR/<库名> 下)"
-            value={name}
-            onChange={(e) => setName(e.target.value)}
-          />
-          <button className={btnPrimary} disabled={create.isPending || !name.trim()}>
-            {create.isPending ? "创建中…" : "建库"}
-          </button>
-        </form>
-        <div className="flex max-w-2xl flex-col gap-4">
-          {(libsQ.data ?? []).map((l) => (
-            <div key={l.id} className={`${card} p-4`}>
-              <div className="mb-1 flex items-baseline gap-3">
-                <span className="font-medium">{l.name}</span>
-                <span className="text-xs text-stone-500">#{l.id}</span>
-              </div>
-              <p className="mb-3 text-xs break-all text-stone-500">{l.root_path}</p>
-              <div className="flex flex-wrap items-center gap-3">
-                <button className={btn} disabled={scan.isPending} onClick={() => scan.mutate(l.id)}>
-                  {scan.isPending ? "扫描中…" : "扫描"}
-                </button>
-                <input
-                  ref={(el) => {
-                    fileRefs.current[l.id] = el;
-                  }}
-                  type="file"
-                  multiple
-                  accept=".cbz,.zip,.pdf,.epub,.txt,.md"
-                  className="hidden"
-                  onChange={(e) => {
-                    void onFiles(l.id, e.target.files);
-                    e.target.value = "";
-                  }}
-                />
-                <button className={btn} onClick={() => fileRefs.current[l.id]?.click()}>
-                  上传文件
-                </button>
-                <span className="text-xs text-stone-600">白名单:cbz/zip/pdf/epub/txt/md</span>
-              </div>
-            </div>
+    <div className="mx-auto w-full max-w-3xl px-4 py-6 sm:px-6">
+      <h1 className="mb-4 text-lg font-semibold tracking-tight">库管理</h1>
+      <form onSubmit={submit} className="mb-6 flex flex-wrap items-center gap-3">
+        <Input className="max-w-64 flex-1" placeholder="库名（服务端目录自动落在 BOOKS_DIR/<库名>）" value={name} onChange={(e) => setName(e.target.value)} />
+        <Button type="submit" disabled={create.isPending || !name.trim()}>
+          {create.isPending ? "创建中…" : "建库"}
+        </Button>
+      </form>
+      {libsQ.isPending && (
+        <div className="space-y-3">
+          {Array.from({ length: 3 }).map((_, i) => (
+            <Skeleton key={i} className="h-28 w-full" />
           ))}
-          {(libsQ.data ?? []).length === 0 && !libsQ.isPending && (
-            <p className="text-sm text-stone-500">还没有库,用上方表单创建。</p>
-          )}
         </div>
+      )}
+      <div className="flex flex-col gap-4">
+        {libs.map((l) => (
+          <Card key={l.id} onDragOver={(e) => e.preventDefault()} onDrop={(e) => onDrop(e, l.id)}>
+            <CardHeader className="flex-row items-baseline justify-between gap-3 space-y-0 py-3">
+              <CardTitle className="flex items-baseline gap-2 text-base">
+                {l.name}
+                <span className="text-xs font-normal text-muted-foreground">#{l.id}</span>
+              </CardTitle>
+              <p className="text-xs text-muted-foreground">{l.root_path}</p>
+            </CardHeader>
+            <CardContent className="flex flex-wrap items-center gap-2 pt-0">
+              <Button variant="outline" size="sm" disabled={scan.isPending} onClick={() => scan.mutate(l.id)}>
+                <RefreshCw /> {scan.isPending ? "扫描中…" : "扫描"}
+              </Button>
+              <input
+                ref={(el) => {
+                  fileRefs.current[l.id] = el;
+                }}
+                type="file"
+                multiple
+                accept=".cbz,.zip,.pdf,.epub,.txt,.md"
+                className="hidden"
+                onChange={(e) => {
+                  void onFiles(l.id, e.target.files);
+                  e.target.value = "";
+                }}
+              />
+              <Button size="sm" onClick={() => fileRefs.current[l.id]?.click()}>
+                <Upload /> 上传文件
+              </Button>
+              <span className="text-xs text-muted-foreground">白名单：cbz/zip/pdf/epub/txt/md · 也可直接拖文件进卡片</span>
+            </CardContent>
+          </Card>
+        ))}
+        {libs.length === 0 && !libsQ.isPending && <p className="text-sm text-muted-foreground">还没有库，用上方表单创建。</p>}
       </div>
     </div>
   );
diff --git a/frontend/src/pages/admin/Users.tsx b/frontend/src/pages/admin/Users.tsx
index ae48636..03bc73e 100644
--- a/frontend/src/pages/admin/Users.tsx
+++ b/frontend/src/pages/admin/Users.tsx
@@ -2,9 +2,16 @@ import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { useState, type FormEvent } from "react";
 import { api } from "../../api/client";
 import { useAuth } from "../../auth/AuthContext";
-import { TopBar } from "../../components/TopBar";
 import { toast } from "../../components/Toaster";
-import { btn, btnPrimary, card, input } from "../../components/ui";
+import {
+  AlertDialog, AlertDialogAction, AlertDialogCancel, AlertDialogContent,
+  AlertDialogDescription, AlertDialogFooter, AlertDialogHeader, AlertDialogTitle, AlertDialogTrigger,
+} from "@/components/ui/alert-dialog";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
+import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
+import { Skeleton } from "@/components/ui/skeleton";
 
 export default function AdminUsers() {
   const qc = useQueryClient();
@@ -39,55 +46,68 @@ export default function AdminUsers() {
   }
 
   return (
-    <div className="flex h-full flex-col">
-      <TopBar />
-      <div className="flex-1 overflow-y-auto p-4">
-        <h1 className="mb-4 text-lg font-semibold">用户管理</h1>
-        <form onSubmit={submit} className={`${card} mb-6 flex max-w-2xl flex-wrap items-center gap-3 p-4`}>
-          <input className={input} placeholder="用户名" value={u} onChange={(e) => setU(e.target.value)} />
-          <input className={input} type="password" placeholder="密码(≥8 位)" value={p} onChange={(e) => setP(e.target.value)} />
-          <select className={input} value={role} onChange={(e) => setRole(e.target.value as "member" | "admin")}>
-            <option value="member">member</option>
-            <option value="admin">admin</option>
-          </select>
-          <button className={btnPrimary} disabled={create.isPending || !u.trim() || p.length < 8}>
-            {create.isPending ? "创建中…" : "创建"}
-          </button>
-        </form>
-        <table className="w-full max-w-2xl text-sm">
-          <thead className="text-left text-stone-500">
-            <tr>
-              <th className="py-1">ID</th>
-              <th>用户名</th>
-              <th>角色</th>
-              <th>创建时间</th>
-              <th />
-            </tr>
-          </thead>
-          <tbody>
+    <div className="mx-auto w-full max-w-3xl px-4 py-6 sm:px-6">
+      <h1 className="mb-4 text-lg font-semibold tracking-tight">用户管理</h1>
+      <form onSubmit={submit} className="mb-6 flex flex-wrap items-center gap-3">
+        <Input className="max-w-40" placeholder="用户名" value={u} onChange={(e) => setU(e.target.value)} />
+        <Input className="max-w-48" type="password" placeholder="密码(≥8 位)" value={p} onChange={(e) => setP(e.target.value)} />
+        <Select value={role} onValueChange={(v) => setRole(v as "member" | "admin")}>
+          <SelectTrigger className="w-28"><SelectValue /></SelectTrigger>
+          <SelectContent>
+            <SelectItem value="member">member</SelectItem>
+            <SelectItem value="admin">admin</SelectItem>
+          </SelectContent>
+        </Select>
+        <Button type="submit" disabled={create.isPending || !u.trim() || p.length < 8}>
+          {create.isPending ? "创建中…" : "创建"}
+        </Button>
+      </form>
+      {usersQ.isPending ? (
+        <Skeleton className="h-40 w-full" />
+      ) : (
+        <Table>
+          <TableHeader>
+            <TableRow>
+              <TableHead className="w-16">ID</TableHead>
+              <TableHead>用户名</TableHead>
+              <TableHead>角色</TableHead>
+              <TableHead>创建时间</TableHead>
+              <TableHead className="w-16" />
+            </TableRow>
+          </TableHeader>
+          <TableBody>
             {(usersQ.data ?? []).map((x) => (
-              <tr key={x.id} className="border-t border-stone-800">
-                <td className="py-1 text-stone-500">{x.id}</td>
-                <td>{x.username}</td>
-                <td>{x.role}</td>
-                <td className="text-stone-500">{x.created_at.slice(0, 19).replace("T", " ")}</td>
-                <td className="py-1 text-right">
-                  <button
-                    className={btn + " text-red-300"}
-                    disabled={x.id === me?.id}
-                    title={x.id === me?.id ? "不能删除自己" : undefined}
-                    onClick={() => {
-                      if (confirm(`删除用户 ${x.username}?`)) del.mutate(x.id);
-                    }}
-                  >
-                    删除
-                  </button>
-                </td>
-              </tr>
+              <TableRow key={x.id}>
+                <TableCell className="text-muted-foreground">{x.id}</TableCell>
+                <TableCell>{x.username}</TableCell>
+                <TableCell>{x.role}</TableCell>
+                <TableCell className="text-muted-foreground">{x.created_at.slice(0, 19).replace("T", " ")}</TableCell>
+                <TableCell className="text-right">
+                  <AlertDialog>
+                    <AlertDialogTrigger asChild>
+                      <Button variant="ghost" size="sm" className="text-destructive hover:text-destructive" disabled={x.id === me?.id} title={x.id === me?.id ? "不能删除自己" : undefined}>
+                        删除
+                      </Button>
+                    </AlertDialogTrigger>
+                    <AlertDialogContent>
+                      <AlertDialogHeader>
+                        <AlertDialogTitle>删除用户 {x.username}？</AlertDialogTitle>
+                        <AlertDialogDescription>该用户的阅读进度与书签一并删除。</AlertDialogDescription>
+                      </AlertDialogHeader>
+                      <AlertDialogFooter>
+                        <AlertDialogCancel>取消</AlertDialogCancel>
+                        <AlertDialogAction className="bg-destructive text-primary-foreground hover:bg-destructive/90" onClick={() => del.mutate(x.id)}>
+                          删除
+                        </AlertDialogAction>
+                      </AlertDialogFooter>
+                    </AlertDialogContent>
+                  </AlertDialog>
+                </TableCell>
+              </TableRow>
             ))}
-          </tbody>
-        </table>
-      </div>
+          </TableBody>
+        </Table>
+      )}
     </div>
   );
 }