Add login page and implement session redirection on authentication

b0esche_cloud/lib/main.dart

@@ -12,6 +12,8 @@ import 'pages/file_explorer.dart';
 import 'pages/document_viewer.dart';
 import 'pages/editor_page.dart';
 import 'pages/join_page.dart';
+import 'pages/login_page.dart';
+import 'blocs/session/session_state.dart';
 import 'pages/public_file_viewer.dart';
 import 'theme/app_theme.dart';
 import 'injection.dart';
@@ -22,6 +24,7 @@ final GoRouter _router = GoRouter(
   initialLocation: kIsWeb ? Uri.base.path : '/',
   routes: [
     GoRoute(path: '/', builder: (context, state) => const HomePage()),
+    GoRoute(path: '/login', builder: (context, state) => const LoginPage()),
     GoRoute(
       path: '/viewer/:orgId/:fileId',
       builder: (context, state) => DocumentViewer(
@@ -122,6 +125,19 @@ class _MainAppState extends State<MainApp> {
           return MaterialApp.router(
             routerConfig: _router,
             theme: AppTheme.darkTheme,
+            builder: (context, child) {
+              return BlocListener<SessionBloc, SessionState>(
+                listener: (context, state) {
+                  if (state is SessionExpiredState) {
+                    final currentLocation = GoRouterState.of(
+                      context,
+                    ).uri.toString();
+                    context.go('/login?redirect=$currentLocation');
+                  }
+                },
+                child: child!,
+              );
+            },
           );
         },
       ),

b0esche_cloud/lib/pages/login_form.dart

@@ -133,7 +133,10 @@ class _LoginFormState extends State<LoginForm> {
           _handleRegistration(context, state);
         } else if (state is AuthAuthenticated) {
           context.read<SessionBloc>().add(SessionStarted(state.token));
-          context.go('/');
+          final redirect = GoRouterState.of(
+            context,
+          ).uri.queryParameters['redirect'];
+          context.go(redirect ?? '/');
         }
       },
       child: Center(

b0esche_cloud/lib/pages/login_page.dart

@@ -0,0 +1,27 @@
+import 'package:flutter/material.dart';
+import './login_form.dart';
+
+class LoginPage extends StatelessWidget {
+  const LoginPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Container(
+        decoration: const BoxDecoration(
+          gradient: LinearGradient(
+            begin: Alignment.topLeft,
+            end: Alignment.bottomRight,
+            colors: [Color(0xFF1a1a2e), Color(0xFF16213e), Color(0xFF0f3460)],
+          ),
+        ),
+        child: const Center(
+          child: SingleChildScrollView(
+            padding: EdgeInsets.all(16),
+            child: LoginForm(),
+          ),
+        ),
+      ),
+    );
+  }
+}