feat(analytics): add Analytics Maturity metric to ManaScore and custom event tracking to 4 apps

Add new "Analytics Maturity" extended metric to ManaScore schema with 5 checks:
pageViewTracking, customEvents, authTracking, landingTracking, publicDashboard.
Populate analytics data across all 20 audit files. Document the metric in about.md.

Add app-specific Umami custom event helpers and integrate tracking into:
- ManaCore: 13 events (nav, onboarding, dashboard widgets, credits, settings)
- Presi: 12 events (deck/slide CRUD, presentation start/exit, sharing)
- Zitare: 9 events (quotes, favorites, categories, search, lists, language)
- Mukke: 12 events (upload, library, playlists, projects, editor export)

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

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

@@ -2,6 +2,7 @@
 	import { onMount } from 'svelte';
 	import { goto } from '$app/navigation';
 	import { decksStore } from '$lib/stores/decks.svelte';
+	import { PresiEvents } from '@manacore/shared-utils/analytics';
 	import { PageHeader, ContextMenu, type ContextMenuItem } from '@manacore/shared-ui';
 	import {
 		Plus,
@@ -74,6 +75,7 @@
 		});
 
 		if (deck) {
+			PresiEvents.deckCreated();
 			showCreateModal = false;
 			newDeckTitle = '';
 			newDeckDescription = '';
@@ -90,6 +92,7 @@
 	async function handleDelete() {
 		if (!deckToDelete) return;
 		await decksStore.deleteDeck(deckToDelete.id);
+		PresiEvents.deckDeleted();
 		showDeleteModal = false;
 		deckToDelete = null;
 	}

apps/presi/apps/web/src/routes/(app)/deck/[id]/+page.svelte

@@ -4,6 +4,7 @@
 	import { goto } from '$app/navigation';
 	import { browser } from '$app/environment';
 	import { decksStore } from '$lib/stores/decks.svelte';
+	import { PresiEvents } from '@manacore/shared-utils/analytics';
 	import { shareApi } from '$lib/api/client';
 	import type { ShareLink } from '$lib/api/client';
 	import type { Slide, SlideContent } from '@presi/shared';
@@ -93,8 +94,10 @@
 
 		if (editingSlide) {
 			await decksStore.updateSlide(editingSlide.id, { content });
+			PresiEvents.slideEdited();
 		} else {
 			await decksStore.createSlide(deckId, { content });
+			PresiEvents.slideCreated();
 		}
 
 		isSaving = false;
@@ -109,6 +112,7 @@
 	async function handleDeleteSlide() {
 		if (!slideToDelete) return;
 		await decksStore.deleteSlide(slideToDelete.id);
+		PresiEvents.slideDeleted();
 		showDeleteModal = false;
 		slideToDelete = null;
 	}
@@ -135,6 +139,7 @@
 		// Update order values
 		newSlides.forEach((s, i) => (s.order = i + 1));
 		await decksStore.reorderSlides(newSlides);
+		PresiEvents.slideReordered(direction);
 	}
 
 	function addBulletPoint() {
@@ -170,6 +175,7 @@
 		try {
 			const newShare = await shareApi.createShare(deckId);
 			shareLinks = [newShare, ...shareLinks];
+			PresiEvents.shareLinkCreated();
 		} catch (e) {
 			console.error('Failed to create share link:', e);
 		} finally {
@@ -181,6 +187,7 @@
 		try {
 			await shareApi.deleteShare(shareId);
 			shareLinks = shareLinks.filter((s) => s.id !== shareId);
+			PresiEvents.shareLinkDeleted();
 		} catch (e) {
 			console.error('Failed to delete share link:', e);
 		}
@@ -195,6 +202,7 @@
 		const url = getShareUrl(share.shareCode);
 		try {
 			await navigator.clipboard.writeText(url);
+			PresiEvents.shareLinkCopied();
 			copiedLinkId = share.id;
 			setTimeout(() => {
 				copiedLinkId = null;

apps/presi/apps/web/src/routes/(app)/present/[id]/+page.svelte

@@ -3,6 +3,7 @@
 	import { page } from '$app/stores';
 	import { goto } from '$app/navigation';
 	import { decksStore } from '$lib/stores/decks.svelte';
+	import { PresiEvents } from '@manacore/shared-utils/analytics';
 	import type { Slide } from '@presi/shared';
 	import {
 		X,
@@ -28,8 +29,12 @@
 
 	const deckId = $page.params.id as string;
 
+	let maxSlideReached = $state(0);
+
 	onMount(() => {
-		decksStore.loadDeck(deckId);
+		decksStore.loadDeck(deckId).then(() => {
+			PresiEvents.presentationStarted(decksStore.currentSlides.length);
+		});
 
 		// Keyboard navigation
 		window.addEventListener('keydown', handleKeydown);
@@ -92,6 +97,7 @@
 	function nextSlide() {
 		if (currentSlideIndex < decksStore.currentSlides.length - 1) {
 			currentSlideIndex++;
+			if (currentSlideIndex > maxSlideReached) maxSlideReached = currentSlideIndex;
 		}
 	}
 
@@ -126,6 +132,7 @@
 	}
 
 	function exitPresentation() {
+		PresiEvents.presentationExited(elapsedSeconds, maxSlideReached + 1);
 		if (document.fullscreenElement) {
 			document.exitFullscreen();
 		}

apps/presi/apps/web/src/routes/(app)/shared/[code]/+page.svelte

@@ -2,6 +2,7 @@
 	import { onMount, onDestroy } from 'svelte';
 	import { page } from '$app/stores';
 	import { shareApi } from '$lib/api/client';
+	import { PresiEvents } from '@manacore/shared-utils/analytics';
 	import type { Slide } from '@presi/shared';
 	import {
 		CaretLeft,
@@ -34,6 +35,7 @@
 			const data = await shareApi.getByCode(shareCode);
 			deck = data;
 			slides = data.slides || [];
+			PresiEvents.sharedDeckViewed();
 		} catch (e) {
 			error = e instanceof Error ? e.message : 'Failed to load shared deck';
 		} finally {