feat: upgrade next-auth to v5.0.0-beta.29 and refactor authentication middleware

- Updated next-auth dependency in package.json to version 5.0.0-beta.29.
- Refactored create-admin script to use a valid email format.
- Implemented authentication middleware for various API routes to enforce access control.
- Refactored API route handlers to improve readability and maintainability.
- Enhanced error handling in authentication error page.
- Added detailed tests for authentication flow, including protected routes and NextAuth endpoints.

src/app/api/tasks/templates/route.js

@@ -1,8 +1,12 @@
 import { getAllTaskTemplates } from "@/lib/queries/tasks";
 import { NextResponse } from "next/server";
+import { withReadAuth } from "@/lib/middleware/auth";
 
 // GET: Get all task templates
-export async function GET() {
+async function getTaskTemplatesHandler() {
 	const templates = getAllTaskTemplates();
 	return NextResponse.json(templates);
 }
+
+// Protected routes - require authentication
+export const GET = withReadAuth(getTaskTemplatesHandler);