feat: Save on close

lib/app.dart

@@ -1,3 +1,5 @@
+// ignore_for_file: use_build_context_synchronously
+
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:window_manager/window_manager.dart' hide WindowCaption;
@@ -18,6 +20,19 @@ class _AppState extends ConsumerState<App> with WindowListener {
   void initState() {
     super.initState();
     windowManager.addListener(this);
+    _init();
+  }
+
+  @override
+  void dispose() {
+    windowManager.removeListener(this);
+    super.dispose();
+  }
+
+  void _init() async {
+    // Add this line to override the default close handler
+    await windowManager.setPreventClose(true);
+    setState(() {});
   }
 
   @override
@@ -37,39 +52,67 @@ class _AppState extends ConsumerState<App> with WindowListener {
     });
   }
 
+  @override
+  void onWindowClose() async {
+    bool isPreventClose = await windowManager.isPreventClose();
+    if (isPreventClose) {
+      if (ref.watch(
+          settingsProvider.select((value) => value.promptBeforeClosing))) {
+        showDialog(
+          context: context,
+          builder: (_) => AlertDialog(
+            title: const Text('Save Changes'),
+            content:
+                const Text('Want to save changes before you close API Dash?'),
+            actions: [
+              OutlinedButton(
+                child: const Text('No'),
+                onPressed: () async {
+                  Navigator.of(context).pop();
+                  await windowManager.destroy();
+                },
+              ),
+              FilledButton(
+                child: const Text('Save'),
+                onPressed: () async {
+                  await ref
+                      .read(collectionStateNotifierProvider.notifier)
+                      .saveData();
+                  Navigator.of(context).pop();
+                  await windowManager.destroy();
+                },
+              ),
+            ],
+          ),
+        );
+      } else {
+        await windowManager.destroy();
+      }
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return const Dashboard();
   }
-
-  @override
-  void dispose() {
-    windowManager.removeListener(this);
-    super.dispose();
-  }
 }
 
-class DashApp extends ConsumerStatefulWidget {
+class DashApp extends ConsumerWidget {
   const DashApp({super.key});
 
   @override
-  ConsumerState<DashApp> createState() => _DashAppState();
-}
-
-class _DashAppState extends ConsumerState<DashApp> {
-  @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
     final isDarkMode =
         ref.watch(settingsProvider.select((value) => value.isDark));
     return MaterialApp(
       debugShowCheckedModeBanner: false,
       theme: ThemeData(
-        visualDensity: VisualDensity.adaptivePlatformDensity,
         fontFamily: kFontFamily,
         fontFamilyFallback: kFontFamilyFallback,
         colorSchemeSeed: kColorSchemeSeed,
         useMaterial3: true,
         brightness: Brightness.light,
+        visualDensity: VisualDensity.adaptivePlatformDensity,
       ),
       darkTheme: ThemeData(
         fontFamily: kFontFamily,
@@ -77,6 +120,7 @@ class _DashAppState extends ConsumerState<DashApp> {
         colorSchemeSeed: kColorSchemeSeed,
         useMaterial3: true,
         brightness: Brightness.dark,
+        visualDensity: VisualDensity.adaptivePlatformDensity,
       ),
       themeMode: isDarkMode ? ThemeMode.dark : ThemeMode.light,
       home: kIsMobile