feat(analytics): add key action tracking to todo, calendar, chat, contacts

Add Umami event tracking for the most important user actions:

- Todo: task_created (with deadline flag), task_completed, task_deleted
- Calendar: event_created (with recurring flag), view_changed
- Chat: message_sent (with model ID)
- Contacts: contact_created

Uses pre-built event helpers from @manacore/shared-utils/analytics.

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

apps/calendar/apps/web/src/lib/stores/events.svelte.ts

@@ -8,6 +8,7 @@ import * as api from '$lib/api/events';
 import { format, isWithinInterval, isSameDay, differenceInMilliseconds } from 'date-fns';
 import { toDate } from '$lib/utils/eventDateHelpers';
 import { toastStore } from '@manacore/shared-ui';
+import { CalendarEvents } from '@manacore/shared-utils/analytics';
 
 // State
 let events = $state<CalendarEvent[]>([]);
@@ -168,6 +169,7 @@ export const eventsStore = {
 
 		if (result.data) {
 			events = [...events, result.data];
+			CalendarEvents.eventCreated(!!data.recurrenceRule);
 		}
 
 		return result;

apps/calendar/apps/web/src/lib/stores/view.svelte.ts

@@ -4,6 +4,7 @@
 
 import { browser } from '$app/environment';
 import type { CalendarViewType } from '@calendar/shared';
+import { CalendarEvents } from '@manacore/shared-utils/analytics';
 import {
 	startOfDay,
 	startOfWeek,
@@ -109,6 +110,7 @@ export const viewStore = {
 		if (browser) {
 			localStorage.setItem('calendar-view-type', type);
 		}
+		CalendarEvents.viewChanged(type as 'day' | 'week' | 'month' | 'agenda');
 	},
 
 	/**

apps/chat/apps/web/src/lib/stores/chat.svelte.ts

@@ -5,6 +5,7 @@
 import { chatService } from '$lib/services/chat';
 import type { ChatCompletionRequest } from '$lib/services/chat';
 import type { Message, AIModel, ChatMessage } from '@chat/types';
+import { ChatEvents } from '@manacore/shared-utils/analytics';
 
 // State
 let messages = $state<Message[]>([]);
@@ -103,6 +104,7 @@ export const chatStore = {
 					createdAt: new Date().toISOString(),
 				};
 				messages = [...messages, assistantMessage];
+				ChatEvents.messageSent(selectedModelId);
 			} else {
 				error = 'Failed to get response';
 			}

apps/contacts/apps/web/src/lib/stores/contacts.svelte.ts

@@ -8,6 +8,7 @@ import { contactsApi } from '$lib/api/contacts';
 import type { Contact, ContactFilters } from '$lib/api/contacts';
 import { authStore } from './auth.svelte';
 import { generateDemoContacts, isDemoContact } from '$lib/data/demo-contacts';
+import { ContactsEvents } from '@manacore/shared-utils/analytics';
 
 // Default page size for pagination
 const DEFAULT_PAGE_SIZE = 50;
@@ -186,6 +187,7 @@ export const contactsStore = {
 			// Add to local state
 			contacts = [contact, ...contacts];
 			total += 1;
+			ContactsEvents.contactCreated();
 			return contact;
 		} catch (e) {
 			error = e instanceof Error ? e.message : 'Failed to create contact';

apps/todo/apps/web/src/lib/stores/tasks.svelte.ts

@@ -9,6 +9,7 @@ import * as tasksApi from '$lib/api/tasks';
 import { isToday, isPast, isFuture, startOfDay, addDays } from 'date-fns';
 import { authStore } from './auth.svelte';
 import { generateDemoTasks, isDemoTask } from '$lib/data/demo-tasks';
+import { TodoEvents } from '@manacore/shared-utils/analytics';
 
 // State
 let tasks = $state<Task[]>([]);
@@ -224,6 +225,7 @@ export const tasksStore = {
 		try {
 			const newTask = await tasksApi.createTask(data);
 			tasks = [...tasks, newTask];
+			TodoEvents.taskCreated(!!data.dueDate);
 			return newTask;
 		} catch (e) {
 			error = e instanceof Error ? e.message : 'Failed to create task';
@@ -339,6 +341,7 @@ export const tasksStore = {
 		try {
 			await tasksApi.deleteTask(id);
 			tasks = tasks.filter((t) => t.id !== id);
+			TodoEvents.taskDeleted();
 		} catch (e) {
 			error = e instanceof Error ? e.message : 'Failed to delete task';
 			console.error('Failed to delete task:', e);
@@ -362,6 +365,7 @@ export const tasksStore = {
 		try {
 			const completedTask = await tasksApi.completeTask(id);
 			tasks = tasks.map((t) => (t.id === id ? completedTask : t));
+			TodoEvents.taskCompleted();
 			return completedTask;
 		} catch (e) {
 			error = e instanceof Error ? e.message : 'Failed to complete task';