diff --git a/frontend/src/lib/components/layout/app-sidebar.svelte b/frontend/src/lib/components/layout/app-sidebar.svelte
index 9dae4da..096e989 100644
--- a/frontend/src/lib/components/layout/app-sidebar.svelte
+++ b/frontend/src/lib/components/layout/app-sidebar.svelte
@@ -1,45 +1,48 @@
 <script lang="ts">
 	import { Separator } from '$lib/components/ui/separator/index.js';
 
-	import SettingsIcon from '@lucide/svelte/icons/settings';
-	import UnjsDb0 from '$lib/components/icons/UnjsDb0.svelte';
+	import ChitaiMark from '$lib/components/icons/chitai-mark.svelte';
 
 	import NavMain from './nav-main.svelte';
+	import NavUser from './nav-user.svelte';
 	import LibrarySwitcher from './library-switcher.svelte';
 	import * as Sidebar from '$lib/components/ui/sidebar/index.js';
 	import type { ComponentProps } from 'svelte';
 	import { getLibraryState } from '$lib/state/library.svelte';
-	import { page } from '$app/state';
 
 	let {
 		ref = $bindable(null),
 		collapsible = 'icon',
+		user,
 		...restProps
-	}: ComponentProps<typeof Sidebar.Root> = $props();
+	}: ComponentProps<typeof Sidebar.Root> & { user: { email: string } } = $props();
 
 	const libraryState = getLibraryState();
 
+	// Keep components out of these objects. `<header.icon />` is a *dynamic*
+	// component: every time the $derived object is recomputed — on hydration
+	// when LibraryState picks up previousLibraryId, and on every navigation for
+	// the footer — Svelte re-evaluates the expression and can remount the SVG,
+	// which reads as a flash and shifts layout. Referencing the component
+	// directly in the markup keeps it static.
 	const header = $derived({
 		title: 'chitai',
-		icon: UnjsDb0,
 		url: `/library/${libraryState.activeLibrary!.id}`
 	});
-
-	const footer = $derived({
-		title: 'Settings',
-		url: '/settings',
-		icon: SettingsIcon,
-		isActive: page.url.pathname.startsWith('/settings')
-	});
 </script>
 
 <Sidebar.Root variant="floating" {collapsible} {...restProps} class="ml-1 py-3">
 	<Sidebar.Header class="h-(--header-height)">
-		<Sidebar.MenuButton>
+		<!--
+			The mark is 28px where the nav icons are 16px, and both start at the same
+			8px padding — so its centre sits 6px right of theirs. -ml-1.5 is that 6px,
+			which lines the logo up with the nav in both expanded and collapsed states.
+		-->
+		<Sidebar.MenuButton class="mt-1 -ml-1.5">
 			{#snippet child({ props })}
 				<a href={header.url} {...props}>
-					<header.icon class="mr-3 scale-175" />
-					<span class="text-xl font-semibold">{header.title}</span>
+					<ChitaiMark class="mr-3 size-7!" />
+					<span class="font-serif text-xl tracking-tight">{header.title}</span>
 				</a>
 			{/snippet}
 		</Sidebar.MenuButton>
@@ -50,15 +53,6 @@
 		<NavMain />
 	</Sidebar.Content>
 	<Sidebar.Footer>
-		<Sidebar.MenuButton class="mb-2" isActive={footer.isActive}>
-			{#snippet child({ props })}
-				<a href={footer.url} {...props}>
-					{#if footer.icon}
-						<footer.icon class="scale-125" />
-					{/if}
-					<span class="text-md pl-2">{footer.title}</span>
-				</a>
-			{/snippet}
-		</Sidebar.MenuButton>
+		<NavUser {user} />
 	</Sidebar.Footer>
 </Sidebar.Root>
diff --git a/frontend/src/lib/components/layout/nav-user.svelte b/frontend/src/lib/components/layout/nav-user.svelte
new file mode 100644
index 0000000..c1ec24f
--- /dev/null
+++ b/frontend/src/lib/components/layout/nav-user.svelte
@@ -0,0 +1,94 @@
+<script lang="ts">
+	import * as Avatar from '$lib/components/ui/avatar/index.js';
+	import * as DropdownMenu from '$lib/components/ui/dropdown-menu/index.js';
+	import * as Sidebar from '$lib/components/ui/sidebar/index.js';
+	import { useSidebar } from '$lib/components/ui/sidebar/index.js';
+	import { logout } from '$lib/api';
+	import { goto } from '$app/navigation';
+	import ChevronsUpDownIcon from '@lucide/svelte/icons/chevrons-up-down';
+	import SettingsIcon from '@lucide/svelte/icons/settings';
+	import PaletteIcon from '@lucide/svelte/icons/palette';
+	import LogOutIcon from '@lucide/svelte/icons/log-out';
+
+	let { user }: { user: { email: string } } = $props();
+
+	const sidebar = useSidebar();
+
+	// No display name on the account yet, so the local part of the address
+	// stands in for one and its first two letters make the avatar.
+	const handle = $derived(user?.email?.split('@')[0] ?? 'Account');
+	const initials = $derived(handle.slice(0, 2).toUpperCase());
+</script>
+
+<Sidebar.Menu>
+	<Sidebar.MenuItem>
+		<DropdownMenu.Root>
+			<DropdownMenu.Trigger>
+				{#snippet child({ props })}
+					<Sidebar.MenuButton
+						{...props}
+						size="lg"
+						class="data-[state=open]:bg-sidebar-accent data-[state=open]:text-sidebar-accent-foreground"
+					>
+						<Avatar.Root class="size-8 rounded-lg">
+							<Avatar.Fallback class="rounded-lg bg-sidebar-primary text-sidebar-primary-foreground">
+								{initials}
+							</Avatar.Fallback>
+						</Avatar.Root>
+						<div class="grid flex-1 text-left text-sm leading-tight">
+							<span class="truncate font-semibold">{handle}</span>
+							<span class="truncate font-mono text-[11px] text-muted-foreground">{user?.email}</span>
+						</div>
+						<ChevronsUpDownIcon class="ml-auto size-4" />
+					</Sidebar.MenuButton>
+				{/snippet}
+			</DropdownMenu.Trigger>
+
+			<DropdownMenu.Content
+				class="w-(--bits-dropdown-menu-anchor-width) min-w-56 rounded-lg"
+				side={sidebar.isMobile ? 'bottom' : 'right'}
+				align="end"
+				sideOffset={4}
+			>
+				<DropdownMenu.Label class="p-0 font-normal">
+					<div class="flex items-center gap-2 px-1 py-1.5 text-left text-sm">
+						<Avatar.Root class="size-8 rounded-lg">
+							<Avatar.Fallback class="rounded-lg bg-sidebar-primary text-sidebar-primary-foreground">
+								{initials}
+							</Avatar.Fallback>
+						</Avatar.Root>
+						<div class="grid flex-1 text-left text-sm leading-tight">
+							<span class="truncate font-semibold">{handle}</span>
+							<span class="truncate font-mono text-[11px] text-muted-foreground">{user?.email}</span>
+						</div>
+					</div>
+				</DropdownMenu.Label>
+
+				<DropdownMenu.Separator />
+
+				<DropdownMenu.Group>
+					<DropdownMenu.Item onSelect={() => goto('/settings/account')}>
+						<SettingsIcon class="size-4" />
+						Settings
+					</DropdownMenu.Item>
+					<DropdownMenu.Item onSelect={() => goto('/settings/appearance')}>
+						<PaletteIcon class="size-4" />
+						Appearance
+					</DropdownMenu.Item>
+				</DropdownMenu.Group>
+
+				<DropdownMenu.Separator />
+
+				<DropdownMenu.Item
+					onSelect={async () => {
+						await logout();
+						await goto('/login');
+					}}
+				>
+					<LogOutIcon class="size-4" />
+					Log out
+				</DropdownMenu.Item>
+			</DropdownMenu.Content>
+		</DropdownMenu.Root>
+	</Sidebar.MenuItem>
+</Sidebar.Menu>
diff --git a/frontend/src/lib/components/ui/avatar/avatar-badge.svelte b/frontend/src/lib/components/ui/avatar/avatar-badge.svelte
new file mode 100644
index 0000000..2df847a
--- /dev/null
+++ b/frontend/src/lib/components/ui/avatar/avatar-badge.svelte
@@ -0,0 +1,26 @@
+<script lang="ts">
+	import { cn, type WithElementRef } from "$lib/utils.js";
+	import type { HTMLAttributes } from "svelte/elements";
+
+	let {
+		ref = $bindable(null),
+		class: className,
+		children,
+		...restProps
+	}: WithElementRef<HTMLAttributes<HTMLSpanElement>> = $props();
+</script>
+
+<span
+	bind:this={ref}
+	data-slot="avatar-badge"
+	class={cn(
+		"bg-primary text-primary-foreground ring-background absolute right-0 bottom-0 z-10 inline-flex items-center justify-center rounded-full bg-blend-color ring-2 select-none",
+		"group-data-[size=sm]/avatar:size-2 group-data-[size=sm]/avatar:[&>svg]:hidden",
+		"group-data-[size=default]/avatar:size-2.5 group-data-[size=default]/avatar:[&>svg]:size-2",
+		"group-data-[size=lg]/avatar:size-3 group-data-[size=lg]/avatar:[&>svg]:size-2",
+		className
+	)}
+	{...restProps}
+>
+	{@render children?.()}
+</span>
diff --git a/frontend/src/lib/components/ui/avatar/avatar-fallback.svelte b/frontend/src/lib/components/ui/avatar/avatar-fallback.svelte
new file mode 100644
index 0000000..62f28d9
--- /dev/null
+++ b/frontend/src/lib/components/ui/avatar/avatar-fallback.svelte
@@ -0,0 +1,20 @@
+<script lang="ts">
+	import { Avatar as AvatarPrimitive } from "bits-ui";
+	import { cn } from "$lib/utils.js";
+
+	let {
+		ref = $bindable(null),
+		class: className,
+		...restProps
+	}: AvatarPrimitive.FallbackProps = $props();
+</script>
+
+<AvatarPrimitive.Fallback
+	bind:ref
+	data-slot="avatar-fallback"
+	class={cn(
+		"rounded-full bg-muted text-muted-foreground flex size-full items-center justify-center text-sm group-data-[size=sm]/avatar:text-xs",
+		className
+	)}
+	{...restProps}
+/>
diff --git a/frontend/src/lib/components/ui/avatar/avatar-group-count.svelte b/frontend/src/lib/components/ui/avatar/avatar-group-count.svelte
new file mode 100644
index 0000000..0a0aeb4
--- /dev/null
+++ b/frontend/src/lib/components/ui/avatar/avatar-group-count.svelte
@@ -0,0 +1,23 @@
+<script lang="ts">
+	import { cn, type WithElementRef } from "$lib/utils.js";
+	import type { HTMLAttributes } from "svelte/elements";
+
+	let {
+		ref = $bindable(null),
+		class: className,
+		children,
+		...restProps
+	}: WithElementRef<HTMLAttributes<HTMLDivElement>> = $props();
+</script>
+
+<div
+	bind:this={ref}
+	data-slot="avatar-group-count"
+	class={cn(
+		"size-8 rounded-full bg-muted text-sm text-muted-foreground group-has-data-[size=lg]/avatar-group:size-10 group-has-data-[size=sm]/avatar-group:size-6 [&>svg]:size-4 group-has-data-[size=lg]/avatar-group:[&>svg]:size-5 group-has-data-[size=sm]/avatar-group:[&>svg]:size-3 relative flex shrink-0 items-center justify-center ring-2 ring-background",
+		className
+	)}
+	{...restProps}
+>
+	{@render children?.()}
+</div>
diff --git a/frontend/src/lib/components/ui/avatar/avatar-group.svelte b/frontend/src/lib/components/ui/avatar/avatar-group.svelte
new file mode 100644
index 0000000..e558356
--- /dev/null
+++ b/frontend/src/lib/components/ui/avatar/avatar-group.svelte
@@ -0,0 +1,23 @@
+<script lang="ts">
+	import { cn, type WithElementRef } from "$lib/utils.js";
+	import type { HTMLAttributes } from "svelte/elements";
+
+	let {
+		ref = $bindable(null),
+		class: className,
+		children,
+		...restProps
+	}: WithElementRef<HTMLAttributes<HTMLDivElement>> = $props();
+</script>
+
+<div
+	bind:this={ref}
+	data-slot="avatar-group"
+	class={cn(
+		"cn-avatar-group group/avatar-group flex -space-x-2 *:data-[slot=avatar]:ring-2 *:data-[slot=avatar]:ring-background",
+		className
+	)}
+	{...restProps}
+>
+	{@render children?.()}
+</div>
diff --git a/frontend/src/lib/components/ui/avatar/avatar-image.svelte b/frontend/src/lib/components/ui/avatar/avatar-image.svelte
new file mode 100644
index 0000000..f41cf8f
--- /dev/null
+++ b/frontend/src/lib/components/ui/avatar/avatar-image.svelte
@@ -0,0 +1,17 @@
+<script lang="ts">
+	import { Avatar as AvatarPrimitive } from "bits-ui";
+	import { cn } from "$lib/utils.js";
+
+	let {
+		ref = $bindable(null),
+		class: className,
+		...restProps
+	}: AvatarPrimitive.ImageProps = $props();
+</script>
+
+<AvatarPrimitive.Image
+	bind:ref
+	data-slot="avatar-image"
+	class={cn("rounded-full aspect-square size-full object-cover", className)}
+	{...restProps}
+/>
diff --git a/frontend/src/lib/components/ui/avatar/avatar.svelte b/frontend/src/lib/components/ui/avatar/avatar.svelte
new file mode 100644
index 0000000..7464798
--- /dev/null
+++ b/frontend/src/lib/components/ui/avatar/avatar.svelte
@@ -0,0 +1,26 @@
+<script lang="ts">
+	import { Avatar as AvatarPrimitive } from "bits-ui";
+	import { cn } from "$lib/utils.js";
+
+	let {
+		ref = $bindable(null),
+		loadingStatus = $bindable("loading"),
+		size = "default",
+		class: className,
+		...restProps
+	}: AvatarPrimitive.RootProps & {
+		size?: "default" | "sm" | "lg";
+	} = $props();
+</script>
+
+<AvatarPrimitive.Root
+	bind:ref
+	bind:loadingStatus
+	data-slot="avatar"
+	data-size={size}
+	class={cn(
+		"size-8 rounded-full after:rounded-full data-[size=lg]:size-10 data-[size=sm]:size-6 group/avatar relative flex shrink-0 select-none after:absolute after:inset-0 after:border after:border-border after:mix-blend-darken dark:after:mix-blend-lighten",
+		className
+	)}
+	{...restProps}
+/>
diff --git a/frontend/src/lib/components/ui/avatar/index.ts b/frontend/src/lib/components/ui/avatar/index.ts
new file mode 100644
index 0000000..963a923
--- /dev/null
+++ b/frontend/src/lib/components/ui/avatar/index.ts
@@ -0,0 +1,22 @@
+import Badge from "./avatar-badge.svelte";
+import Fallback from "./avatar-fallback.svelte";
+import GroupCount from "./avatar-group-count.svelte";
+import Group from "./avatar-group.svelte";
+import Image from "./avatar-image.svelte";
+import Root from "./avatar.svelte";
+
+export {
+	Root,
+	Image,
+	Fallback,
+	Badge,
+	Group,
+	GroupCount,
+	//
+	Root as Avatar,
+	Image as AvatarImage,
+	Fallback as AvatarFallback,
+	Badge as AvatarBadge,
+	Group as AvatarGroup,
+	GroupCount as AvatarGroupCount,
+};