feat(mukke): display album cover art in library, playlists, and song lists

Add batch cover-url endpoint (POST /library/cover-urls) to efficiently
resolve multiple cover art presigned URLs in a single request. Integrate
cover art display across all UI surfaces: album grid, album detail header,
song list thumbnails, playlist grid, and playlist detail song list.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/todo/apps/web/src/lib/version.ts

@@ -0,0 +1 @@
+export const APP_VERSION = '1.0.0';

apps/todo/apps/web/src/routes/(app)/settings/+page.svelte

@@ -3,6 +3,7 @@
 	import { goto } from '$app/navigation';
 	import { authStore } from '$lib/stores/auth.svelte';
 	import { userSettings } from '$lib/stores/user-settings.svelte';
+	import { APP_VERSION } from '$lib/version';
 	import { todoSettings, type TodoView, type KanbanCardSize } from '$lib/stores/settings.svelte';
 	import { projectsStore } from '$lib/stores/projects.svelte';
 	import type { TaskPriority } from '@todo/shared';
@@ -698,4 +699,6 @@
 			{/snippet}
 		</SettingsDangerButton>
 	</SettingsDangerZone>
+
+	<p class="mt-8 pb-4 text-center text-xs text-gray-400 dark:text-gray-600">v{APP_VERSION}</p>
 </SettingsPage>

apps/todo/apps/web/src/routes/(auth)/login/+page.svelte

@@ -9,6 +9,7 @@
 	import { authStore } from '$lib/stores/auth.svelte';
 	import AppSlider from '$lib/components/AppSlider.svelte';
 	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import { APP_VERSION } from '$lib/version';
 
 	// Get redirect URL from query params or sessionStorage (set by AuthGateModal)
 	const redirectTo = $derived.by(() => {
@@ -65,6 +66,7 @@
 	{translations}
 	{verified}
 	{initialEmail}
+	version={APP_VERSION}
 >
 	{#snippet headerControls()}
 		<LanguageSelector />