diff --git a/frontend/app/components/assistant-ui/threadlist-sidebar.tsx b/frontend/app/components/assistant-ui/threadlist-sidebar.tsx
index 8b15a2f..2efce1e 100644
--- a/frontend/app/components/assistant-ui/threadlist-sidebar.tsx
+++ b/frontend/app/components/assistant-ui/threadlist-sidebar.tsx
@@ -586,6 +586,9 @@ function AccountMenu({
 		(sum, item) => sum + item.totalTokens,
 		0,
 	);
+	const selectedSkillMemory = selectedMemorySkill
+		? skillMemories.find((item) => item.skill === selectedMemorySkill)
+		: null;
 
 	return (
 		<PopoverPrimitive.Root open={open} onOpenChange={setOpen}>
@@ -757,43 +760,90 @@ function AccountMenu({
 				</PopoverPrimitive.Content>
 			</PopoverPrimitive.Portal>
 			<Dialog open={memoryDialogOpen} onOpenChange={setMemoryDialogOpen}>
-				<DialogContent className="max-h-[86vh] overflow-hidden sm:max-w-3xl">
+				<DialogContent className="max-h-[88vh] overflow-hidden sm:max-w-5xl">
 					<DialogHeader>
 						<DialogTitle>个性化记忆</DialogTitle>
 						<DialogDescription>
-							这里展示当前账号的记忆内容和异步整理队列，保存后会影响后续对话注入。
+							用户记忆会全局注入；Skill 记忆按 Skill 文件保存，后续按启用的
+							Skill 注入。
 						</DialogDescription>
 					</DialogHeader>
-					<div className="grid min-h-0 gap-4 md:grid-cols-[1fr_240px]">
-						<div className="grid min-h-0 gap-2">
-							<div className="flex gap-1 overflow-x-auto pb-1">
+					<div className="grid min-h-0 gap-4 md:grid-cols-[220px_1fr_240px]">
+						<div className="min-h-0 rounded-md border bg-muted/20">
+							<div className="border-b px-3 py-2 font-medium text-xs">
+								记忆文件
+							</div>
+							<div className="max-h-[520px] overflow-y-auto p-2">
 								<Button
-									size="xs"
+									className="mb-2 h-auto w-full justify-start px-2 py-2 text-left"
+									size="sm"
 									variant={selectedMemorySkill ? "outline" : "secondary"}
 									onClick={() => {
 										setSelectedMemorySkill("");
 										setMemoryDraft(userMemory?.content ?? "");
 									}}
 								>
-									用户记忆
+									<div className="min-w-0">
+										<div className="truncate font-medium">用户记忆</div>
+										<div className="text-muted-foreground text-xs">
+											{userMemory?.line_count ?? 0} 行
+										</div>
+									</div>
 								</Button>
-								{skillMemories.map((item) => (
-									<Button
-										key={item.skill}
-										size="xs"
-										variant={
-											selectedMemorySkill === item.skill
-												? "secondary"
-												: "outline"
-										}
-										onClick={() => {
-											setSelectedMemorySkill(item.skill);
-											setMemoryDraft(item.content);
-										}}
-									>
-										{item.skill}
-									</Button>
-								))}
+								<div className="mb-1 px-1 text-muted-foreground text-xs">
+									Skill 记忆
+								</div>
+								{skillMemories.length ? (
+									<div className="grid gap-1">
+										{skillMemories.map((item) => (
+											<Button
+												key={item.skill}
+												className="h-auto w-full justify-start px-2 py-2 text-left"
+												size="sm"
+												variant={
+													selectedMemorySkill === item.skill
+														? "secondary"
+														: "ghost"
+												}
+												onClick={() => {
+													setSelectedMemorySkill(item.skill);
+													setMemoryDraft(item.content);
+												}}
+											>
+												<div className="min-w-0">
+													<div className="truncate font-medium">
+														{item.skill}
+													</div>
+													<div className="text-muted-foreground text-xs">
+														{item.line_count ?? 0} 行
+														{item.updated_at
+															? ` · ${formatShortTime(item.updated_at)}`
+															: ""}
+													</div>
+												</div>
+											</Button>
+										))}
+									</div>
+								) : (
+									<div className="rounded-md border border-dashed p-3 text-muted-foreground text-xs">
+										还没有 Skill 记忆。后续使用 Skill
+										时，如果出现可沉淀经验，会按 Skill 单独生成文件。
+									</div>
+								)}
+							</div>
+						</div>
+						<div className="grid min-h-0 content-start gap-2">
+							<div className="rounded-md border bg-muted/20 px-3 py-2">
+								<div className="font-medium text-sm">
+									{selectedMemorySkill
+										? `${selectedMemorySkill} 使用记忆`
+										: "用户记忆"}
+								</div>
+								<div className="mt-1 text-muted-foreground text-xs">
+									{selectedMemorySkill
+										? "仅在该 Skill 启用并进入模型可见列表时注入。"
+										: "作为当前账号的长期偏好和通用经验注入。"}
+								</div>
 							</div>
 							<textarea
 								className="min-h-[420px] resize-none rounded-md border bg-background p-3 font-mono text-xs outline-none"
@@ -802,10 +852,11 @@ function AccountMenu({
 							/>
 							<div className="flex items-center justify-between gap-2">
 								<span className="truncate text-muted-foreground text-xs">
-									当前编辑：
-									{selectedMemorySkill
-										? `${selectedMemorySkill} 使用记忆`
-										: "用户记忆"}
+									{selectedMemorySkill && selectedSkillMemory?.updated_at
+										? `最近更新 ${formatShortTime(selectedSkillMemory.updated_at)}`
+										: userMemory?.updated_at
+											? `最近更新 ${formatShortTime(userMemory.updated_at)}`
+											: "暂无更新时间"}
 								</span>
 								<Button
 									size="sm"
@@ -925,6 +976,17 @@ function formatCompactNumber(value: number) {
 	}).format(value);
 }
 
+function formatShortTime(value: string) {
+	const timestamp = Date.parse(value);
+	if (Number.isNaN(timestamp)) return value;
+	return new Intl.DateTimeFormat("zh-CN", {
+		month: "2-digit",
+		day: "2-digit",
+		hour: "2-digit",
+		minute: "2-digit",
+	}).format(new Date(timestamp));
+}
+
 function AccountStat({
 	label,
 	value,
diff --git a/frontend/app/lib/claw-auth.ts b/frontend/app/lib/claw-auth.ts
index fdb0c6a..e5346d7 100644
--- a/frontend/app/lib/claw-auth.ts
+++ b/frontend/app/lib/claw-auth.ts
@@ -10,6 +10,8 @@ const AUTH_ROOT = path.join(
 const USERS_PATH = path.join(AUTH_ROOT, "users.json");
 const SESSIONS_PATH = path.join(AUTH_ROOT, "auth_sessions.json");
 const COOKIE_NAME = "claw_account_session";
+const SESSION_MAX_AGE_SECONDS = 60 * 60 * 24 * 30;
+const SESSION_REFRESH_INTERVAL_MS = 60 * 60 * 12 * 1000;
 
 type UserRecord = {
 	id: string;
@@ -23,7 +25,10 @@ type UsersFile = {
 };
 
 type SessionsFile = {
-	sessions: Record<string, { accountId: string; createdAt: string }>;
+	sessions: Record<
+		string,
+		{ accountId: string; createdAt: string; updatedAt?: string }
+	>;
 };
 
 export type AccountSession = {
@@ -87,6 +92,11 @@ export async function getCurrentAccount(): Promise<AccountSession | null> {
 	const usersFile = await readUsers();
 	const account = usersFile.users.find((user) => user.id === session.accountId);
 	if (!account) return null;
+	if (shouldRefreshSession(session.updatedAt ?? session.createdAt)) {
+		session.updatedAt = new Date().toISOString();
+		await writeSessions(sessionsFile);
+		await setSessionCookie(token);
+	}
 	return { id: account.id, username: account.username };
 }
 
@@ -132,16 +142,22 @@ async function createSession(account: UserRecord) {
 	sessionsFile.sessions[token] = {
 		accountId: account.id,
 		createdAt: new Date().toISOString(),
+		updatedAt: new Date().toISOString(),
 	};
 	await writeSessions(sessionsFile);
 
+	await setSessionCookie(token);
+	return { id: account.id, username: account.username };
+}
+
+async function setSessionCookie(token: string) {
 	const cookieStore = await cookies();
 	cookieStore.set(COOKIE_NAME, token, {
 		httpOnly: true,
 		sameSite: "lax",
 		path: "/",
+		maxAge: SESSION_MAX_AGE_SECONDS,
 	});
-	return { id: account.id, username: account.username };
 }
 
 async function createAccountDirectories(accountId: string) {
@@ -207,3 +223,10 @@ function verifyPassword(password: string, passwordHash: string) {
 	const expected = Buffer.from(expectedHash);
 	return actual.length === expected.length && timingSafeEqual(actual, expected);
 }
+
+function shouldRefreshSession(value?: string) {
+	if (!value) return true;
+	const timestamp = Date.parse(value);
+	if (Number.isNaN(timestamp)) return true;
+	return Date.now() - timestamp > SESSION_REFRESH_INTERVAL_MS;
+}