fix: Disable shortcuts for android and iOS

lib/widgets/input_bar.dart

@@ -265,14 +265,19 @@ class InputBar extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final useShortCuts = (PlatformInfos.isWeb || PlatformInfos.isDesktop);
     return Shortcuts(
-      shortcuts: {
+      shortcuts: !useShortCuts
+          ? {}
+          : {
               LogicalKeySet(LogicalKeyboardKey.shift, LogicalKeyboardKey.enter):
                   NewLineIntent(),
               LogicalKeySet(LogicalKeyboardKey.enter): SubmitLineIntent(),
             },
       child: Actions(
-        actions: {
+        actions: !useShortCuts
+            ? {}
+            : {
                 NewLineIntent: CallbackAction(onInvoke: (i) {
                   final val = controller.value;
                   final selection = val.selection.start;
@@ -289,9 +294,7 @@ class InputBar extends StatelessWidget {
                   return null;
                 }),
                 SubmitLineIntent: CallbackAction(onInvoke: (i) {
-            if (PlatformInfos.isWeb || PlatformInfos.isDesktop) {
                   onSubmitted(controller.text);
-            }
                   return null;
                 }),
               },