feat: integrate shared-links into Calendar, Contacts, and ManaCore

Add @manacore/shared-links to Calendar, Contacts, and ManaCore apps.
Link store initializes alongside tag store in each app's layout, syncs
when authenticated, and is ready for cross-app linking.

Also fix broken workspace references in moodlit (shared-feedback-service
→ feedback, shared-feedback-ui removed, shared-subscription-ui →
subscriptions).

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

apps/contacts/apps/web/package.json

@@ -45,6 +45,7 @@
 		"@manacore/feedback": "workspace:*",
 		"@manacore/help": "workspace:*",
 		"@manacore/local-store": "workspace:*",
+		"@manacore/shared-links": "workspace:*",
 		"@manacore/shared-i18n": "workspace:*",
 		"@manacore/shared-icons": "workspace:*",
 		"@manacore/shared-profile-ui": "workspace:*",

apps/contacts/apps/web/src/routes/(app)/+layout.svelte

@@ -52,6 +52,7 @@
 		tagMutations,
 		useAllTags as useAllSharedTags,
 	} from '@manacore/shared-stores';
+	import { linkLocalStore, linkMutations } from '@manacore/shared-links';
 	import { contactsOnboarding } from '$lib/stores/app-onboarding.svelte';
 	import { MiniOnboardingModal } from '@manacore/shared-app-onboarding';
 	import { SessionExpiredBanner, AuthGate, GuestWelcomeModal } from '@manacore/shared-auth-ui';
@@ -305,13 +306,18 @@
 
 	async function handleAuthReady() {
 		// Initialize local-first databases (opens IndexedDB, seeds guest data)
-		await Promise.all([contactsLocalStore.initialize(), tagLocalStore.initialize()]);
+		await Promise.all([
+			contactsLocalStore.initialize(),
+			tagLocalStore.initialize(),
+			linkLocalStore.initialize(),
+		]);
 
 		// If authenticated, start syncing to server
 		if (authStore.isAuthenticated) {
 			const getToken = () => authStore.getValidToken();
 			contactsLocalStore.startSync(getToken);
 			tagMutations.startSync(getToken);
+			linkMutations.startSync(getToken);
 		}
 
 		// Initialize split-panel from URL/localStorage