opt.

- add help for ssh virt keys
- rm unused lib

lib/view/page/ssh/virt_key_setting.dart

@@ -1,12 +1,13 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/l10n.dart';
-import 'package:nil/nil.dart';
 import 'package:toolbox/core/extension/order.dart';
 import 'package:toolbox/core/utils/platform.dart';
 import 'package:toolbox/core/utils/ui.dart';
 import 'package:toolbox/data/model/ssh/virtual_key.dart';
+import 'package:toolbox/data/res/ui.dart';
 import 'package:toolbox/data/store/setting.dart';
 import 'package:toolbox/locator.dart';
+import 'package:toolbox/view/widget/round_rect_card.dart';
 
 class SSHVirtKeySettingPage extends StatefulWidget {
   const SSHVirtKeySettingPage({Key? key}) : super(key: key);
@@ -44,17 +45,18 @@ class _SSHVirtKeySettingPageState extends State<SSHVirtKeySettingPage> {
     final disabled = VirtKey.values.where((e) => !keys.contains(e)).toList();
     final allKeys = [...keys, ...disabled];
     return ReorderableListView.builder(
-      padding: const EdgeInsets.fromLTRB(11, 3, 0, 3),
+      padding: const EdgeInsets.all(7),
       itemBuilder: (_, idx) {
         final key = allKeys[idx];
-        return ListTile(
-          key: ValueKey(idx),
-          title: _buildTitle(key),
-          leading: _buildCheckBox(keys, key, idx, idx < keys.length),
-          trailing: isDesktop
-              ? nil
-              : const Icon(Icons.drag_handle, color: Colors.grey),
-        );
+        final help = key.help(_s);
+        return RoundRectCard(
+            key: ValueKey(idx),
+            ListTile(
+              title: _buildTitle(key),
+              subtitle: help == null ? null : Text(help, style: grey),
+              leading: _buildCheckBox(keys, key, idx, idx < keys.length),
+              trailing: isDesktop ? null : const Icon(Icons.drag_handle),
+            ));
       },
       itemCount: allKeys.length,
       onReorder: (o, n) {
@@ -70,12 +72,8 @@ class _SSHVirtKeySettingPageState extends State<SSHVirtKeySettingPage> {
 
   Widget _buildTitle(VirtKey key) {
     return key.icon == null
-        ? Text(
-            key.text,
-            textAlign: TextAlign.center,
-          )
+        ? Text(key.text)
         : Row(
-            mainAxisAlignment: MainAxisAlignment.center,
             children: [
               Text(key.text),
               const SizedBox(width: 10),