refactor: move activity domain components to lib/activity/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/routes/+page.svelte

@@ -3,7 +3,7 @@ import DropZone from './DropZone.svelte';
 import DashboardResumeStrip from '$lib/components/DashboardResumeStrip.svelte';
 import MissionControlStrip from '$lib/components/MissionControlStrip.svelte';
 import DashboardFamilyPulse from '$lib/components/DashboardFamilyPulse.svelte';
-import DashboardActivityFeed from '$lib/components/DashboardActivityFeed.svelte';
+import DashboardActivityFeed from '$lib/activity/DashboardActivityFeed.svelte';
 import EnrichmentBlock from '$lib/components/EnrichmentBlock.svelte';
 import { m } from '$lib/paraglide/messages.js';
 

frontend/src/routes/aktivitaeten/+page.svelte

@@ -4,11 +4,11 @@ import { goto } from '$app/navigation';
 import { page, navigating } from '$app/state';
 import * as m from '$lib/paraglide/messages.js';
 import { notificationStore, type NotificationItem } from '$lib/stores/notifications.svelte';
-import ChronikFuerDichBox from '$lib/components/chronik/ChronikFuerDichBox.svelte';
-import ChronikFilterPills from '$lib/components/chronik/ChronikFilterPills.svelte';
-import ChronikTimeline from '$lib/components/chronik/ChronikTimeline.svelte';
-import ChronikEmptyState from '$lib/components/chronik/ChronikEmptyState.svelte';
-import ChronikErrorCard from '$lib/components/chronik/ChronikErrorCard.svelte';
+import ChronikFuerDichBox from '$lib/activity/ChronikFuerDichBox.svelte';
+import ChronikFilterPills from '$lib/activity/ChronikFilterPills.svelte';
+import ChronikTimeline from '$lib/activity/ChronikTimeline.svelte';
+import ChronikEmptyState from '$lib/activity/ChronikEmptyState.svelte';
+import ChronikErrorCard from '$lib/activity/ChronikErrorCard.svelte';
 import type { components } from '$lib/generated/api';
 import type { FilterValue } from './+page.server';
 import { applyClientFilter } from './clientFilter';