opt.

- spi: use ip as name if empty
- server tab ui
- only display io speed when available

lib/data/model/server/disk.dart

@@ -44,8 +44,9 @@ class DiskIO extends TimeSeq<DiskIOPiece> {
 
   (String?, String?) getSpeed(String dev) {
     final (read_, write_) = _getSpeed(dev);
-    final read = '${read_?.convertBytes}/s';
-    final write = '${write_?.convertBytes}/s';
+    if (read_ == null || write_ == null) return (null, null);
+    final read = '${read_.convertBytes}/s';
+    final write = '${write_.convertBytes}/s';
     return (read, write);
   }
 

lib/view/page/server/edit.dart

@@ -393,7 +393,9 @@ class _ServerEditPageState extends State<ServerEditPage> {
     }
 
     final spi = ServerPrivateInfo(
-      name: _nameController.text,
+      name: _nameController.text.isEmpty
+          ? _ipController.text
+          : _nameController.text,
       ip: _ipController.text,
       port: int.parse(_portController.text),
       user: _usernameController.text,

lib/view/page/server/tab.dart

@@ -212,8 +212,8 @@ class _ServerPageState extends State<ServerPage>
   Widget _wrapWithSizedbox(Widget child) {
     return SizedBox(
       width: _useDoubleColumn
-          ? (_media.size.width - 146) / 10
-          : (_media.size.width - 74) / 5,
+          ? (_media.size.width - 137) / 8
+          : (_media.size.width - 74) / 4,
       child: child,
     );
   }
@@ -307,9 +307,7 @@ class _ServerPageState extends State<ServerPage>
   List<Widget> _buildNormalCard(ServerStatus ss, ServerPrivateInfo spi) {
     return [
       UIs.height13,
-      Padding(
-        padding: const EdgeInsets.symmetric(horizontal: 13),
-        child: Row(
+      Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: [
           _wrapWithSizedbox(_buildPercentCircle(ss.cpu.usedPercent())),
@@ -318,7 +316,6 @@ class _ServerPageState extends State<ServerPage>
           _wrapWithSizedbox(_buildDisk(ss, spi.id)),
         ],
       ),
-      ),
       UIs.height13,
       if (Stores.setting.moveOutServerTabFuncBtns.fetch() &&
           // Discussion #146