use m3e iconbuttons

lib/helpers/extensions/build_event_options.dart

@@ -95,6 +95,7 @@ extension BuildEventOptions on Event {
           child: IconTheme(
             data: theme.iconTheme,
             child: Row(
+              mainAxisAlignment: .center,
               children: [
                 for (final emoji in {
                   ...ref
@@ -104,7 +105,7 @@ extension BuildEventOptions on Event {
                   "🤣",
                   "😭",
                   "🤔",
-                }.take(4))
+                }.take(3))
                   IconButton(
                     icon: Text(emoji),
                     onPressed: () async {

lib/helpers/extensions/scheme_to_theme.dart

@@ -28,6 +28,7 @@ extension SchemeToTheme on ColorScheme {
           borderRadius: .circular(8),
         ),
       ),
+      iconButtonTheme: .new(variant: StyleVariant.material3Expressive),
       textTheme: textTheme,
       inputDecorationTheme: const InputDecorationTheme(
         border: OutlineInputBorder(),