Can download songs

lib/ui/music_player.dart

@@ -8,6 +8,7 @@ import 'package:flutter/material.dart';
 import 'package:music_web_player/api.dart';
 import 'package:music_web_player/ui/cover_image.dart';
 import 'package:music_web_player/ui/player_web_interface.dart';
+import 'package:url_launcher/url_launcher_string.dart';
 import 'package:video_player/video_player.dart';
 
 extension DurationExt on Duration {
@@ -191,7 +192,24 @@ class _MusicPlayerState extends State<MusicPlayer> {
                   ),
 
                   Positioned(
-                      top: 10, right: 10, child: _buildToggleListButton()),
+                      top: 10,
+                      right: 10,
+                      child: fluent.Row(
+                        children: [
+                          _buildToggleListButton(),
+                        ],
+                      )),
+
+                  Positioned(
+                      bottom: 10,
+                      right: 10,
+                      child: fluent.Row(
+                        children: [
+                          _buildDownloadTrackButton(),
+                          const SizedBox(width: 10),
+                          _buildAboutButton(),
+                        ],
+                      )),
                 ],
               ),
             ),
@@ -284,6 +302,22 @@ class _MusicPlayerState extends State<MusicPlayer> {
         ),
       );
 
+  Widget _buildDownloadTrackButton() => fluent.Button(
+        onPressed: () =>
+            launchUrlString(currMusic.musicURL, webOnlyWindowName: "_blank"),
+        child: const fluent.Icon(fluent.FluentIcons.download),
+      );
+
+  Widget _buildAboutButton() => fluent.Button(
+        onPressed: () => showLicensePage(
+          context: context,
+          applicationName: "Music Player",
+          applicationIcon:
+              const fluent.Icon(FluentIcons.music_note_2_24_regular),
+        ),
+        child: const fluent.Icon(fluent.FluentIcons.info),
+      );
+
   Widget _buildToggleListButton() => fluent.ToggleButton(
         checked: _showPlaylist,
         onChanged: (s) => setState(() => _showPlaylist = s),