chore: restore product scaffold to rollback baseline

apps/chanora_flutter/lib/widgets/connect_widgets.dart

@@ -65,7 +65,6 @@ class _ConnectFormState extends State<ConnectForm> {
           keyboardType: TextInputType.url,
           textCapitalization: TextCapitalization.none,
           textInputAction: TextInputAction.next,
-          onSubmitted: (_) => _nickFocus.requestFocus(),
           autocorrect: false,
           enableSuggestions: false,
           inputFormatters: [
@@ -90,7 +89,6 @@ class _ConnectFormState extends State<ConnectForm> {
           focusNode: _nickFocus,
           onTapOutside: _onTapOutside,
           textInputAction: TextInputAction.next,
-          onSubmitted: (_) => _passwordFocus.requestFocus(),
           autocorrect: false,
           enableSuggestions: false,
           decoration: InputDecoration(
@@ -105,7 +103,6 @@ class _ConnectFormState extends State<ConnectForm> {
           onTapOutside: _onTapOutside,
           obscureText: true,
           textInputAction: TextInputAction.done,
-          onSubmitted: (_) => widget.onConnect(),
           autocorrect: false,
           enableSuggestions: false,
           decoration: InputDecoration(
@@ -115,22 +112,37 @@ class _ConnectFormState extends State<ConnectForm> {
           ),
         ),
         const SizedBox(height: 16),
-        Row(
-          children: [
-            Expanded(
-              child: FilledButton.icon(
-                icon: const Icon(Icons.login),
-                label: Text(l10n.connectAction),
-                onPressed: widget.onConnect,
-              ),
-            ),
-            const SizedBox(width: 8),
-            OutlinedButton.icon(
+        LayoutBuilder(
+          builder: (context, constraints) {
+            const stackedActionsMaxWidth = 400.0;
+            final connectButton = FilledButton.icon(
+              icon: const Icon(Icons.login),
+              label: Text(l10n.connectAction),
+              onPressed: widget.onConnect,
+            );
+            final bookmarkButton = OutlinedButton.icon(
               icon: const Icon(Icons.bookmark_add_outlined),
               label: Text(l10n.bookmarkAddAction),
               onPressed: widget.onAddBookmark,
-            ),
-          ],
+            );
+            if (constraints.maxWidth <= stackedActionsMaxWidth) {
+              return Column(
+                crossAxisAlignment: CrossAxisAlignment.stretch,
+                children: [
+                  connectButton,
+                  const SizedBox(height: 8),
+                  bookmarkButton,
+                ],
+              );
+            }
+            return Row(
+              children: [
+                Expanded(child: connectButton),
+                const SizedBox(width: 8),
+                Flexible(child: bookmarkButton),
+              ],
+            );
+          },
         ),
       ],
     );