diff --git a/CLAUDE.md b/CLAUDE.md
index d54fb9504..d81233d86 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -558,7 +558,7 @@ Logged in:  App → IndexedDB → UI → SyncEngine → mana-sync (Go) → Postg
                                   ← WebSocket push ←
 ```
 
-### Migrated Apps (20/23)
+### Migrated Apps (21/23)
 
 | App | Collections | Status |
 |-----|------------|--------|
@@ -584,8 +584,9 @@ Logged in:  App → IndexedDB → UI → SyncEngine → mana-sync (Go) → Postg
 | Taktik | clients, projects, timeEntries, tags, templates, settings | Done |
 | uLoad | links, tags, folders, linkTags | Done |
 | Calc | calculations, savedFormulas | Done |
+| ManaCore | userSettings, dashboardConfigs | Done |
 
-**Not migrated (no CRUD data model):** ManaCore (hub), Matrix (protocol client), Playground (stateless)
+**Not migrated (no CRUD data model):** Matrix (protocol client), Playground (stateless)
 
 ### Dev Commands (Local-First Stack)
 
diff --git a/apps/manacore/apps/web/package.json b/apps/manacore/apps/web/package.json
index 121c8fd7a..1ffb3610b 100644
--- a/apps/manacore/apps/web/package.json
+++ b/apps/manacore/apps/web/package.json
@@ -43,6 +43,7 @@
 	},
 	"dependencies": {
 		"@manacore/credits": "workspace:^",
+		"@manacore/local-store": "workspace:*",
 		"@manacore/qr-export": "workspace:*",
 		"@manacore/shared-auth": "workspace:*",
 		"@manacore/shared-auth-stores": "workspace:*",
diff --git a/apps/manacore/apps/web/src/lib/data/guest-seed.ts b/apps/manacore/apps/web/src/lib/data/guest-seed.ts
new file mode 100644
index 000000000..e212a4b48
--- /dev/null
+++ b/apps/manacore/apps/web/src/lib/data/guest-seed.ts
@@ -0,0 +1,58 @@
+/**
+ * Guest seed data for ManaCore.
+ *
+ * These records are loaded into IndexedDB when a new guest visits the app.
+ * They provide sensible defaults for settings and dashboard layout.
+ */
+
+import type { LocalUserSettings, LocalDashboardConfig } from './local-store';
+
+// ─── Default Settings ──────────────────────────────────────
+
+export const guestSettings: LocalUserSettings[] = [
+	{
+		id: 'settings-global',
+		key: 'global',
+		theme: 'system',
+		themeVariant: 'default',
+		language: 'de',
+		pinnedThemes: [],
+		hiddenNavItems: {},
+	},
+];
+
+// ─── Default Dashboard ─────────────────────────────────────
+
+export const guestDashboardConfigs: LocalDashboardConfig[] = [
+	{
+		id: 'dashboard-default',
+		widgets: [
+			{
+				id: 'clock-timers-1',
+				type: 'clock-timers',
+				title: 'dashboard.widgets.clock.title',
+				size: 'small',
+				position: { x: 0, y: 0 },
+				visible: true,
+			},
+			{
+				id: 'tasks-today-1',
+				type: 'tasks-today',
+				title: 'dashboard.widgets.tasks_today.title',
+				size: 'small',
+				position: { x: 4, y: 0 },
+				visible: true,
+			},
+			{
+				id: 'calendar-events-1',
+				type: 'calendar-events',
+				title: 'dashboard.widgets.calendar.title',
+				size: 'small',
+				position: { x: 8, y: 0 },
+				visible: true,
+			},
+		],
+		gridColumns: 12,
+		lastModified: new Date().toISOString(),
+	},
+];
diff --git a/apps/manacore/apps/web/src/lib/data/local-store.ts b/apps/manacore/apps/web/src/lib/data/local-store.ts
new file mode 100644
index 000000000..1caace183
--- /dev/null
+++ b/apps/manacore/apps/web/src/lib/data/local-store.ts
@@ -0,0 +1,59 @@
+/**
+ * ManaCore App — Local-First Data Layer
+ *
+ * Defines the IndexedDB database, collections, and guest seed data.
+ * Collections: userSettings, dashboardConfigs
+ * Tags use the shared tagLocalStore from @manacore/shared-stores.
+ */
+
+import { createLocalStore, type BaseRecord } from '@manacore/local-store';
+import type { WidgetConfig } from '$lib/types/dashboard';
+import { guestSettings, guestDashboardConfigs } from './guest-seed.js';
+
+// ─── Types ──────────────────────────────────────────────────
+
+export interface LocalUserSettings extends BaseRecord {
+	/** Settings scope: 'global' for cross-app, or an appId for per-app overrides. */
+	key: string;
+	theme?: string;
+	themeVariant?: string;
+	language?: string;
+	pinnedThemes?: string[];
+	hiddenNavItems?: Record<string, boolean>;
+	/** Catch-all for future settings fields. */
+	extra?: Record<string, unknown>;
+}
+
+export interface LocalDashboardConfig extends BaseRecord {
+	widgets: WidgetConfig[];
+	gridColumns: number;
+	lastModified: string;
+}
+
+// ─── Store ──────────────────────────────────────────────────
+
+const SYNC_SERVER_URL = import.meta.env.PUBLIC_SYNC_SERVER_URL || 'http://localhost:3050';
+
+export const manacoreStore = createLocalStore({
+	appId: 'manacore',
+	collections: [
+		{
+			name: 'userSettings',
+			indexes: ['key'],
+			guestSeed: guestSettings,
+		},
+		{
+			name: 'dashboardConfigs',
+			indexes: [],
+			guestSeed: guestDashboardConfigs,
+		},
+	],
+	sync: {
+		serverUrl: SYNC_SERVER_URL,
+	},
+});
+
+// Typed collection accessors
+export const settingsCollection = manacoreStore.collection<LocalUserSettings>('userSettings');
+export const dashboardCollection =
+	manacoreStore.collection<LocalDashboardConfig>('dashboardConfigs');
diff --git a/apps/manacore/apps/web/src/lib/data/queries.ts b/apps/manacore/apps/web/src/lib/data/queries.ts
new file mode 100644
index 000000000..58a51a8a8
--- /dev/null
+++ b/apps/manacore/apps/web/src/lib/data/queries.ts
@@ -0,0 +1,36 @@
+/**
+ * ManaCore — Reactive Live Queries
+ *
+ * Svelte 5 reactive queries for settings and dashboard data.
+ * Auto-update when IndexedDB changes (local writes, sync, other tabs).
+ */
+
+import { useLiveQuery, useLiveQueryWithDefault } from '@manacore/local-store/svelte';
+import {
+	settingsCollection,
+	dashboardCollection,
+	type LocalUserSettings,
+	type LocalDashboardConfig,
+} from './local-store.js';
+
+/** Global user settings. Auto-updates on any change. */
+export function useGlobalSettings() {
+	return useLiveQuery<LocalUserSettings | undefined>(() =>
+		settingsCollection.get('settings-global')
+	);
+}
+
+/** Dashboard configuration. Auto-updates on any change. */
+export function useDashboardConfig() {
+	return useLiveQuery<LocalDashboardConfig | undefined>(() =>
+		dashboardCollection.get('dashboard-default')
+	);
+}
+
+/** All user settings (global + per-app overrides). */
+export function useAllSettings() {
+	return useLiveQueryWithDefault(
+		() => settingsCollection.getAll(undefined, { sortBy: 'key', sortDirection: 'asc' }),
+		[] as LocalUserSettings[]
+	);
+}
diff --git a/apps/manacore/apps/web/src/lib/stores/dashboard.svelte.ts b/apps/manacore/apps/web/src/lib/stores/dashboard.svelte.ts
index 90210ad72..716553bb4 100644
--- a/apps/manacore/apps/web/src/lib/stores/dashboard.svelte.ts
+++ b/apps/manacore/apps/web/src/lib/stores/dashboard.svelte.ts
@@ -1,19 +1,48 @@
 /**
- * Dashboard Store - Manages dashboard configuration using Svelte 5 runes
+ * Dashboard Store - Manages dashboard configuration using local-first IndexedDB
  *
- * Handles widget layout, edit mode, and persistence to localStorage.
+ * Reads/writes to the dashboardConfigs collection in @manacore/local-store.
+ * Changes sync across devices via mana-sync.
  */
 
 import { browser } from '$app/environment';
 import type { DashboardConfig, WidgetConfig, WidgetSize, WidgetType } from '$lib/types/dashboard';
-import { DEFAULT_DASHBOARD_CONFIG, DASHBOARD_STORAGE_KEY } from '$lib/config/default-dashboard';
+import { DEFAULT_DASHBOARD_CONFIG } from '$lib/config/default-dashboard';
 import { getWidgetMeta } from '$lib/types/dashboard';
+import { dashboardCollection, type LocalDashboardConfig } from '$lib/data/local-store';
 
 // State
 let config = $state<DashboardConfig>(structuredClone(DEFAULT_DASHBOARD_CONFIG));
 let isEditing = $state(false);
 let initialized = $state(false);
 
+/** Write current config to IndexedDB. */
+async function persist() {
+	if (!browser) return;
+
+	config.lastModified = new Date().toISOString();
+
+	const record: Partial<LocalDashboardConfig> = {
+		widgets: config.widgets,
+		gridColumns: config.gridColumns,
+		lastModified: config.lastModified,
+	};
+
+	try {
+		const existing = await dashboardCollection.get('dashboard-default');
+		if (existing) {
+			await dashboardCollection.update('dashboard-default', record);
+		} else {
+			await dashboardCollection.insert({
+				id: 'dashboard-default',
+				...record,
+			} as LocalDashboardConfig);
+		}
+	} catch (e) {
+		console.error('Failed to save dashboard config:', e);
+	}
+}
+
 /**
  * Dashboard store with Svelte 5 runes
  */
@@ -36,19 +65,19 @@ export const dashboardStore = {
 	},
 
 	/**
-	 * Initialize dashboard from localStorage
+	 * Initialize dashboard from IndexedDB
 	 */
-	initialize() {
+	async initialize() {
 		if (!browser || initialized) return;
 
 		try {
-			const stored = localStorage.getItem(DASHBOARD_STORAGE_KEY);
-			if (stored) {
-				const parsed = JSON.parse(stored) as DashboardConfig;
-				// Validate structure
-				if (parsed.widgets && Array.isArray(parsed.widgets)) {
-					config = parsed;
-				}
+			const stored = await dashboardCollection.get('dashboard-default');
+			if (stored && stored.widgets && Array.isArray(stored.widgets)) {
+				config = {
+					widgets: stored.widgets,
+					gridColumns: stored.gridColumns || 12,
+					lastModified: stored.lastModified || new Date().toISOString(),
+				};
 			}
 		} catch (e) {
 			console.error('Failed to load dashboard config:', e);
@@ -58,18 +87,9 @@ export const dashboardStore = {
 	},
 
 	/**
-	 * Persist current config to localStorage
+	 * Persist current config to IndexedDB
 	 */
-	persist() {
-		if (!browser) return;
-
-		try {
-			config.lastModified = new Date().toISOString();
-			localStorage.setItem(DASHBOARD_STORAGE_KEY, JSON.stringify(config));
-		} catch (e) {
-			console.error('Failed to save dashboard config:', e);
-		}
-	},
+	persist,
 
 	/**
 	 * Enter edit mode
@@ -83,7 +103,7 @@ export const dashboardStore = {
 	 */
 	stopEditing() {
 		isEditing = false;
-		this.persist();
+		persist();
 	},
 
 	/**
@@ -121,7 +141,7 @@ export const dashboardStore = {
 		const widget = config.widgets.find((w) => w.id === widgetId);
 		if (widget) {
 			widget.size = size;
-			this.persist();
+			persist();
 		}
 	},
 
@@ -132,7 +152,7 @@ export const dashboardStore = {
 		const widget = config.widgets.find((w) => w.id === widgetId);
 		if (widget) {
 			widget.visible = !widget.visible;
-			this.persist();
+			persist();
 		}
 	},
 
@@ -149,7 +169,7 @@ export const dashboardStore = {
 			if (existing) {
 				// Just make it visible
 				existing.visible = true;
-				this.persist();
+				persist();
 				return;
 			}
 		}
@@ -171,7 +191,7 @@ export const dashboardStore = {
 		};
 
 		config.widgets = [...config.widgets, newWidget];
-		this.persist();
+		persist();
 	},
 
 	/**
@@ -179,7 +199,7 @@ export const dashboardStore = {
 	 */
 	removeWidget(widgetId: string) {
 		config.widgets = config.widgets.filter((w) => w.id !== widgetId);
-		this.persist();
+		persist();
 	},
 
 	/**
@@ -187,7 +207,7 @@ export const dashboardStore = {
 	 */
 	resetToDefault() {
 		config = structuredClone(DEFAULT_DASHBOARD_CONFIG);
-		this.persist();
+		persist();
 	},
 
 	/**
diff --git a/apps/manacore/apps/web/src/lib/stores/tags.svelte.ts b/apps/manacore/apps/web/src/lib/stores/tags.svelte.ts
index 0e08b03ef..c9a8198ee 100644
--- a/apps/manacore/apps/web/src/lib/stores/tags.svelte.ts
+++ b/apps/manacore/apps/web/src/lib/stores/tags.svelte.ts
@@ -1,20 +1,19 @@
 /**
- * Tag Store - Uses shared createTagStore backed by central mana-core-auth
+ * Tag Store - Re-exports shared local-first tag store
+ *
+ * Tags use the shared IndexedDB ('manacore-tags') across all apps.
+ * This module re-exports for backward compatibility with existing imports.
  */
-import { browser } from '$app/environment';
-import { createTagStore } from '@manacore/shared-stores';
-import { authStore } from '$lib/stores/auth.svelte';
 
-function getAuthUrl(): string {
-	if (browser && typeof window !== 'undefined') {
-		const injectedUrl = (window as unknown as { __PUBLIC_MANA_CORE_AUTH_URL__?: string })
-			.__PUBLIC_MANA_CORE_AUTH_URL__;
-		return injectedUrl || 'http://localhost:3001';
-	}
-	return 'http://localhost:3001';
-}
-
-export const tagStore = createTagStore({
-	authUrl: getAuthUrl(),
-	getToken: () => authStore.getValidToken(),
-});
+export {
+	tagLocalStore,
+	tagMutations,
+	tagCollection,
+	tagGroupCollection,
+	useAllTags,
+	useAllTagGroups,
+	getTagById,
+	getTagsByIds,
+	getTagColor,
+	getTagsByGroup,
+} from '@manacore/shared-stores';
diff --git a/apps/manacore/apps/web/src/routes/(app)/+layout.svelte b/apps/manacore/apps/web/src/routes/(app)/+layout.svelte
index fb7f96a42..30163a97f 100644
--- a/apps/manacore/apps/web/src/routes/(app)/+layout.svelte
+++ b/apps/manacore/apps/web/src/routes/(app)/+layout.svelte
@@ -8,7 +8,9 @@
 	import { locale } from 'svelte-i18n';
 	import { PillNavigation, TagStrip } from '@manacore/shared-ui';
 	import type { PillNavItem, PillDropdownItem } from '@manacore/shared-ui';
-	import { tagStore } from '$lib/stores/tags.svelte';
+	import { tagLocalStore, tagMutations, useAllTags } from '$lib/stores/tags.svelte';
+	import { manacoreStore } from '$lib/data/local-store';
+	import { dashboardStore } from '$lib/stores/dashboard.svelte';
 	import {
 		THEME_DEFINITIONS,
 		DEFAULT_THEME_VARIANTS,
@@ -84,6 +86,9 @@
 	// User email for user dropdown
 	let userEmail = $derived(authStore.user?.email);
 
+	// Tags (local-first reactive query)
+	const allTags = useAllTags();
+
 	// TagStrip visibility
 	let isTagStripVisible = $state(false);
 	function handleTagStripToggle() {
@@ -162,6 +167,8 @@
 	}
 
 	async function handleSignOut() {
+		manacoreStore.stopSync();
+		tagMutations.stopSync();
 		await authStore.signOut();
 		goto('/login');
 	}
@@ -195,6 +202,17 @@
 			return;
 		}
 
+		// Initialize local-first databases (opens IndexedDB, seeds guest data)
+		await Promise.all([manacoreStore.initialize(), tagLocalStore.initialize()]);
+
+		// Start syncing to server
+		const getToken = () => authStore.getValidToken();
+		manacoreStore.startSync(getToken);
+		tagMutations.startSync(getToken);
+
+		// Initialize dashboard from IndexedDB
+		await dashboardStore.initialize();
+
 		// Initialize collapsed state from localStorage
 		const savedCollapsed = localStorage.getItem(STORAGE_KEYS.NAV_COLLAPSED);
 		if (savedCollapsed === 'true') {
@@ -202,14 +220,8 @@
 			collapsedStore.set(true);
 		}
 
-		// Load user settings from server (don't await - let it load in background)
-		// Silently catch errors since settings endpoint may not exist yet
-		userSettings.load().catch(() => {
-			// Settings API not available - use defaults
-		});
-
-		// Load tags
-		tagStore.fetchTags();
+		// Load user settings from server (still needed for shared-theme sync)
+		userSettings.load().catch(() => {});
 
 		// Load onboarding state and show wizard if needed
 		onboardingStore.load();
@@ -281,7 +293,7 @@
 		<!-- TagStrip (above PillNav, toggled via Tags pill) -->
 		{#if isTagStripVisible}
 			<TagStrip
-				tags={tagStore.tags.map((t) => ({
+				tags={(allTags.value ?? []).map((t) => ({
 					id: t.id,
 					name: t.name,
 					color: t.color || '#3b82f6',
@@ -290,7 +302,7 @@
 				onToggle={() => {}}
 				onClear={() => {}}
 				managementHref="/tags"
-				loading={tagStore.loading}
+				loading={allTags.loading}
 			/>
 		{/if}
 
diff --git a/apps/manacore/apps/web/src/routes/(app)/dashboard/+page.svelte b/apps/manacore/apps/web/src/routes/(app)/dashboard/+page.svelte
index fd2f6f0a6..b027f0a1b 100644
--- a/apps/manacore/apps/web/src/routes/(app)/dashboard/+page.svelte
+++ b/apps/manacore/apps/web/src/routes/(app)/dashboard/+page.svelte
@@ -9,8 +9,8 @@
 	import { ManaCoreEvents } from '@manacore/shared-utils/analytics';
 	import DashboardGrid from '$lib/components/dashboard/DashboardGrid.svelte';
 
-	onMount(() => {
-		dashboardStore.initialize();
+	onMount(async () => {
+		await dashboardStore.initialize();
 	});
 
 	function handleToggleEditing() {
diff --git a/apps/manacore/apps/web/src/routes/(app)/tags/+page.svelte b/apps/manacore/apps/web/src/routes/(app)/tags/+page.svelte
index da2d6e611..ac50ad99b 100644
--- a/apps/manacore/apps/web/src/routes/(app)/tags/+page.svelte
+++ b/apps/manacore/apps/web/src/routes/(app)/tags/+page.svelte
@@ -1,12 +1,7 @@
 <script lang="ts">
-	import { tagStore } from '$lib/stores/tags.svelte';
-	import { onMount } from 'svelte';
+	import { useAllTags } from '$lib/stores/tags.svelte';
 
-	onMount(() => {
-		if (tagStore.tags.length === 0) {
-			tagStore.fetchTags();
-		}
-	});
+	const tags = useAllTags();
 </script>
 
 <svelte:head>
@@ -15,19 +10,19 @@
 
 <div class="tags-page">
 	<h1>Tags verwalten</h1>
-	<p class="text-sm text-muted-foreground mb-4">
+	<p class="mb-4 text-sm text-muted-foreground">
 		Tags sind app-übergreifend — Änderungen gelten in allen ManaCore-Apps.
 	</p>
 
-	{#if tagStore.loading}
+	{#if tags.loading}
 		<p>Lädt...</p>
-	{:else if tagStore.tags.length === 0}
+	{:else if (tags.value ?? []).length === 0}
 		<p>Keine Tags vorhanden.</p>
 	{:else}
 		<div class="grid gap-2">
-			{#each tagStore.tags as tag}
-				<div class="flex items-center gap-2 p-2 rounded-lg bg-card">
-					<span class="w-3 h-3 rounded-full" style="background-color: {tag.color}"></span>
+			{#each tags.value ?? [] as tag}
+				<div class="flex items-center gap-2 rounded-lg bg-card p-2">
+					<span class="h-3 w-3 rounded-full" style="background-color: {tag.color}"></span>
 					<span>{tag.name}</span>
 				</div>
 			{/each}