feat(ui): Implement a simple 'About' page

lib/main.dart

@@ -4,6 +4,7 @@ import 'package:anitrack/src/ui/bloc/anime_search_bloc.dart';
 import 'package:anitrack/src/ui/bloc/details_bloc.dart';
 import 'package:anitrack/src/ui/bloc/navigation_bloc.dart';
 import 'package:anitrack/src/ui/constants.dart';
+import 'package:anitrack/src/ui/pages/about.dart';
 import 'package:anitrack/src/ui/pages/anime_list.dart';
 import 'package:anitrack/src/ui/pages/anime_search.dart';
 import 'package:anitrack/src/ui/pages/details.dart';
@@ -83,6 +84,7 @@ class MyApp extends StatelessWidget {
           case animeListRoute: return AnimeListPage.route;
           case animeSearchRoute: return AnimeSearchPage.route;
           case detailsRoute: return DetailsPage.route;
+          case aboutRoute: return AboutPage.route;
         }
 
         return null;

lib/src/ui/constants.dart

@@ -1,3 +1,4 @@
 const animeListRoute = '/anime/list';
 const animeSearchRoute = '/anime/search';
 const detailsRoute = '/anime/details';
+const aboutRoute = '/about';

lib/src/ui/pages/about.dart

@@ -0,0 +1,72 @@
+import 'dart:io';
+import 'package:anitrack/licenses.g.dart';
+import 'package:anitrack/src/ui/constants.dart';
+import 'package:flutter/material.dart';
+import 'package:url_launcher/url_launcher.dart';
+
+class AboutPage extends StatelessWidget {
+  AboutPage({
+    super.key,
+  });
+
+  static MaterialPageRoute<dynamic> get route => MaterialPageRoute<dynamic>(
+    builder: (_) => AboutPage(),
+    settings: const RouteSettings(
+      name: aboutRoute,
+    ),
+  );
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('About'),
+      ),
+      body: ListView.builder(
+        itemCount: ossLicenses.length + 1,
+        itemBuilder: (context, index) {
+          if (index == 0) {
+            return Padding(
+              padding: const EdgeInsets.all(16),
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.center,
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  Text(
+                    'AniTrack',
+                    style: Theme.of(context).textTheme.titleLarge,
+                  ),
+
+                  ElevatedButton(
+                    onPressed: () async {
+                      await launchUrl(
+                        Uri.parse('https://codeberg.org/PapaTutuWawa/anitrack'),
+                        mode: LaunchMode.externalApplication,
+                      );
+                    },
+                    child: Text('Source')
+                  ),
+                ],
+              ),
+            );
+          }
+
+          final dep = ossLicenses[index - 1];
+          if (!dep.isDirectDependency) return Container();
+
+          return ListTile(
+            title: Text(dep.name),
+            onTap: () async {
+              if (dep.repository == null) return;
+
+              await launchUrl(
+                Uri.parse(dep.repository!),
+                mode: LaunchMode.externalApplication,
+              );
+            },
+          );
+        },
+      ),
+    );
+  }
+}

lib/src/ui/pages/anime_list.dart

@@ -98,6 +98,32 @@ class AnimeListPage extends StatelessWidget {
               _getPopupButton(context, state),
             ],
           ),
+          drawer: Drawer(
+            child: ListView(
+              children: [
+                DrawerHeader(
+                  decoration: BoxDecoration(
+                    color: Color(0xffcf4aff),
+                  ),
+                  child: Text(
+                    'AniTrack',
+                    style: TextStyle(
+                      color: Color(0xff232323),
+                      fontSize: 24,
+                    ),
+                  ),
+                ),
+
+                ListTile(
+                  leading: Icon(Icons.info),
+                  title: Text('About'),
+                  onTap: () {
+                    Navigator.of(context).pushNamed(aboutRoute);
+                  },
+                ),
+              ],
+            ),
+          ),
           body: PageView(
             // Prevent swiping between pages
             // (https://github.com/flutter/flutter/issues/37510#issuecomment-612663656)