feat: AI Kurzy module, project/service documents, services SQL import

- Add AI Kurzy module with courses, participants, and registrations management
- Add project documents and service documents features
- Add service folders for document organization
- Add SQL import queries for services from firmy.slovensko.ai
- Update todo notifications and group messaging
- Various API improvements and bug fixes

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/services/todo.service.js

@@ -1,6 +1,6 @@
 import { db } from '../config/database.js';
 import { todos, todoUsers, notes, projects, companies, users } from '../db/schema.js';
-import { eq, desc, ilike, or, and, inArray } from 'drizzle-orm';
+import { eq, desc, ilike, or, and, inArray, lt, ne, sql } from 'drizzle-orm';
 import { NotFoundError } from '../utils/errors.js';
 import { getAccessibleResourceIds } from '../middlewares/auth/resourceAccessMiddleware.js';
 import { sendPushNotificationToUsers } from './push.service.js';
@@ -471,3 +471,90 @@ export const getTodosByUserId = async (userId) => {
     .where(inArray(todos.id, todoIds))
     .orderBy(desc(todos.createdAt));
 };
+
+/**
+ * Get count of overdue todos for a user
+ * Overdue = dueDate < now AND status !== 'completed'
+ * For members: only counts todos they are assigned to
+ */
+export const getOverdueCount = async (userId, userRole) => {
+  const now = new Date();
+
+  // Get accessible todo IDs for non-admin users
+  let accessibleTodoIds = null;
+  if (userRole && userRole !== 'admin') {
+    accessibleTodoIds = await getAccessibleResourceIds('todo', userId);
+    if (accessibleTodoIds.length === 0) {
+      return 0;
+    }
+  }
+
+  const conditions = [
+    lt(todos.dueDate, now),
+    ne(todos.status, 'completed'),
+  ];
+
+  if (accessibleTodoIds !== null) {
+    conditions.push(inArray(todos.id, accessibleTodoIds));
+  }
+
+  const result = await db
+    .select({ count: sql`count(*)::int` })
+    .from(todos)
+    .where(and(...conditions));
+
+  return result[0]?.count || 0;
+};
+
+/**
+ * Get count of todos created by user that were completed but not yet notified
+ * Returns todos where createdBy = userId AND status = 'completed' AND completedNotifiedAt IS NULL
+ */
+export const getCompletedByMeCount = async (userId) => {
+  const result = await db
+    .select({ count: sql`count(*)::int` })
+    .from(todos)
+    .where(
+      and(
+        eq(todos.createdBy, userId),
+        eq(todos.status, 'completed'),
+        sql`${todos.completedNotifiedAt} IS NULL`
+      )
+    );
+
+  return result[0]?.count || 0;
+};
+
+/**
+ * Mark all completed todos created by user as notified
+ * Called when user opens the Todos page
+ */
+export const markCompletedAsNotified = async (userId) => {
+  await db
+    .update(todos)
+    .set({ completedNotifiedAt: new Date() })
+    .where(
+      and(
+        eq(todos.createdBy, userId),
+        eq(todos.status, 'completed'),
+        sql`${todos.completedNotifiedAt} IS NULL`
+      )
+    );
+
+  return { success: true };
+};
+
+/**
+ * Get combined todo counts for sidebar badges
+ */
+export const getTodoCounts = async (userId, userRole) => {
+  const [overdueCount, completedByMeCount] = await Promise.all([
+    getOverdueCount(userId, userRole),
+    getCompletedByMeCount(userId),
+  ]);
+
+  return {
+    overdueCount,
+    completedByMeCount,
+  };
+};