refactor(modules): update existing module implementations across attendance, audit, auth, classes, course-plans, exams, files, homework, layout, proctoring, questions, scheduling, textbooks, users

- Update attendance components and data-access for record management

- Update audit log views, filters, and data-access

- Update auth login and register forms

- Update classes actions, components, and data-access (admin, schedule, stats)

- Update course-plans actions, form, list, progress, and schema

- Update exams actions, AI pipeline, preview components, and hooks

- Update files components (icon, list, preview, upload) and data-access

- Update homework assignment form, review view, auto-save hook, and stats-service

- Update layout sidebar, header, and navigation config

- Update proctoring actions, anti-cheat monitor, and data-access

- Update questions actions, components (dialog, actions, columns, filters), and data-access

- Update scheduling actions, auto-scheduler, components, and schema

- Update textbooks constants and text-selection hook

- Update users class-registration, import-dialog, data-access, and user-service

src/modules/layout/components/site-header.tsx

@@ -27,7 +27,7 @@ import {
 } from "@/shared/components/ui/dropdown-menu"
 import { GlobalSearch } from "@/shared/components/global-search"
 
-import { NotificationDropdown } from "@/modules/messaging/components/notification-dropdown"
+import { NotificationDropdown } from "@/modules/notifications/components/notification-dropdown"
 import { useSidebar } from "./sidebar-provider"
 import { NAV_CONFIG } from "../config/navigation"