main, fix older versions of Android not being able to see bottom widgets when keyboard is open.

lib/main.dart

@@ -368,7 +368,9 @@ class _HomeScreenState extends State<HomeScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(title: const Text('Sunset Alarm')),
-      body: Padding(
+      resizeToAvoidBottomInset: true, // default, but be explicit
+      body: SingleChildScrollView(
+        child: Padding(
           padding: const EdgeInsets.all(16),
           child: Column(
             crossAxisAlignment: CrossAxisAlignment.start,
@@ -547,6 +549,7 @@ class _HomeScreenState extends State<HomeScreen> {
             ],
           ),
         ),
+      ),
     );
   }