fix: address analysis issues - remove unused import, fix deprecated APIs, update test

lib/settings_screen.dart

@@ -66,18 +66,16 @@ class _SettingsScreenState extends State<SettingsScreen> {
     });
 
     if (mounted) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(content: Text('Settings saved')),
-      );
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(const SnackBar(content: Text('Settings saved')));
     }
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(
-        title: const Text('Settings'),
-      ),
+      appBar: AppBar(title: const Text('Settings')),
       body: ListView(
         padding: const EdgeInsets.all(16),
         children: [
@@ -120,15 +118,18 @@ class _SettingsScreenState extends State<SettingsScreen> {
       padding: const EdgeInsets.only(top: 16, bottom: 8),
       child: Text(
         title,
-        style: Theme.of(context).textTheme.titleMedium?.copyWith(
-              fontWeight: FontWeight.bold,
-            ),
+        style: Theme.of(
+          context,
+        ).textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold),
       ),
     );
   }
 
-  Widget _buildTextField(String label, TextEditingController controller,
-      {bool obscure = false}) {
+  Widget _buildTextField(
+    String label,
+    TextEditingController controller, {
+    bool obscure = false,
+  }) {
     return TextField(
       controller: controller,
       decoration: InputDecoration(labelText: label),
@@ -176,4 +177,4 @@ class _SettingsScreenState extends State<SettingsScreen> {
       },
     );
   }
-}
+}