#34 fix & new

- fix: `ping`
- new: support busybox `ping`
- new: flutter 3.10.0

lib/view/page/ping.dart

@@ -14,11 +14,8 @@ import '../../locator.dart';
 import '../widget/input_field.dart';
 import '../widget/round_rect_card.dart';
 
-final doaminReg =
-    RegExp(r'^[a-zA-Z0-9][a-zA-Z0-9-]{1,61}[a-zA-Z0-9]\.[a-zA-Z]{2,}$');
-final ipv4Reg =
-    RegExp(r'^((25[0-5]|(2[0-4]|1[0-9]|[1-9]|)[0-9])(\.(?!$)|$)){4}$');
-final ipv6Reg = RegExp(r'^([0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$');
+/// Only permit ipv4 / ipv6 / domain chars
+final targetReg = RegExp(r'[a-zA-Z0-9\.-_:]+');
 
 class PingPage extends StatefulWidget {
   const PingPage({Key? key}) : super(key: key);
@@ -148,9 +145,8 @@ class _PingPageState extends State<PingPage>
       return;
     }
 
-    if (!doaminReg.hasMatch(target) &&
-        !ipv4Reg.hasMatch(target) &&
-        !ipv6Reg.hasMatch(target)) {
+    /// avoid ping command injection
+    if (!targetReg.hasMatch(target)) {
       showSnackBar(context, Text(s.pingInputIP));
       return;
     }

lib/view/page/private_key/edit.dart

@@ -152,7 +152,7 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
           onPressed: () async {
             final path = await pickOneFile();
             if (path == null) {
-              showSnackBar(context, const Text('path is null'));
+              showSnackBar(context, Text(_s.fieldMustNotEmpty));
               return;
             }
 

lib/view/page/server/detail.dart

@@ -345,11 +345,11 @@ class _ServerDetailPageState extends State<ServerDetailPage>
   }
 
   Widget _buildNetSpeedTop() {
-    return Padding(
-      padding: const EdgeInsets.only(bottom: 3),
+    return const Padding(
+      padding: EdgeInsets.only(bottom: 3),
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
-        children: const [
+        children: [
           Icon(Icons.device_hub, size: 17),
           Icon(Icons.arrow_downward, size: 17),
           Icon(Icons.arrow_upward, size: 17),