Update loader argument types for stricter typing

Replaces plain object destructuring for loader functions with
LoaderFunctionArgs type in the auth and dashboard modules. This
enhances type safety and aligns with best practices for
TypeScript in the React-Router environment.

Author: MichielOlijslagers

app/features/auth/layout.tsx

@@ -1,7 +1,7 @@
-import { Outlet, redirect } from "react-router";
+import { Outlet, redirect, type LoaderFunctionArgs } from "react-router";
 import { auth } from "~/lib/auth";
 
-export async function loader({ request }: { request: Request }) {
+export async function loader({ request }: LoaderFunctionArgs) {
   const session = await auth.api.getSession({
     headers: request.headers,
   });

app/features/dashboard/layout.tsx

@@ -1,4 +1,4 @@
-import { Outlet, redirect, useOutletContext } from "react-router";
+import { Outlet, redirect, useOutletContext, type LoaderFunctionArgs } from "react-router";
 import { AppSidebar } from "./components/app-sidebar";
 import {
   Breadcrumb,
@@ -73,7 +73,7 @@ const navAdmin: NavItem[] = [
   },
 ];
 
-export const loader = async ({ request }: { request: Request }) => {
+export const loader = async ({ request }: LoaderFunctionArgs) => {
   const session = await auth.api.getSession({
     headers: request.headers,
   });