fix: show toast error and fallback icon when album art fails to load

pubspec.yaml

@@ -15,7 +15,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 0.2.0+1
+version: 0.2.1+1
 
 environment:
   sdk: ">=2.16.1 <3.0.0"
@@ -34,6 +34,7 @@ dependencies:
   flutter_local_notifications: ^9.3.2
   url_launcher: ^6.0.20
   web_scraper: ^0.1.4
+  fluttertoast: ^8.0.9
 
 dev_dependencies:
   flutter_test: