Add useAuthentication hook and enhance useRouter for improved navigation and session management

- Introduced `useAuthentication` hook to handle session state, PIN verification, and offline mode logic.
- Updated `useRouter` to include type definitions for better navigation instance typing.
- Refined authentication flow with error handling, user session initialization, and token validation.

lib/navigation.ts

@@ -1,6 +1,12 @@
 import {useNavigate, useParams as useRouterParams, Link, useLocation} from 'react-router-dom';
 
-function useRouter() {
+export type AppRouterInstance = {
+    push: (path: string) => void;
+    replace: (path: string) => void;
+    back: () => void;
+};
+
+function useRouter(): AppRouterInstance {
     const navigate = useNavigate();
     return {
         push: (path: string) => navigate(path),