opt.

lib/view/page/convert.dart

@@ -41,6 +41,13 @@ class _ConvertPageState extends State<ConvertPage>
     _s = S.of(context)!;
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+    _textEditingController.dispose();
+    _textEditingControllerResult.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     super.build(context);

lib/view/page/docker.dart

@@ -41,6 +41,7 @@ class _DockerManagePageState extends State<DockerManagePage> {
   void dispose() {
     super.dispose();
     _docker.clear();
+    _textController.dispose();
   }
 
   @override
@@ -54,8 +55,6 @@ class _DockerManagePageState extends State<DockerManagePage> {
     super.initState();
     final client = locator<ServerProvider>().servers[widget.spi.id]?.client;
     if (client == null) {
-      showSnackBar(context, Text(_s.noClient));
-      context.pop();
       return;
     }
     _docker.init(client, widget.spi.user, onPwdRequest, widget.spi.id);

lib/view/page/full_screen.dart

@@ -63,6 +63,7 @@ class _FullScreenPageState extends State<FullScreenPage> with AfterLayoutMixin {
   void dispose() {
     super.dispose();
     _timer.cancel();
+    _pageController.dispose();
   }
 
   @override

lib/view/page/home.dart

@@ -75,6 +75,7 @@ class _HomePageState extends State<HomePage>
     super.dispose();
     WidgetsBinding.instance.removeObserver(this);
     _serverProvider.closeServer();
+    _pageController.dispose();
   }
 
   @override

lib/view/page/ping.dart

@@ -48,6 +48,13 @@ class _PingPageState extends State<PingPage>
     _s = S.of(context)!;
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+    _textEditingController.dispose();
+    _results.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     super.build(context);

lib/view/page/pkg.dart

@@ -45,18 +45,17 @@ class _PkgManagePageState extends State<PkgManagePage>
   void dispose() {
     super.dispose();
     _pkgProvider.clear();
+    _textController.dispose();
+    _scrollController.dispose();
+    _scrollControllerUpdate.dispose();
   }
 
   @override
   void initState() {
     super.initState();
     final si = locator<ServerProvider>().servers[widget.spi.id];
-    if (si == null || si.client == null) {
-      showSnackBar(context, Text(_s.waitConnection));
-      context.pop();
-      return;
-    }
 
+    if (si == null) return;
     _pkgProvider.init(
       si.client!,
       si.status.sysVer.dist,

lib/view/page/private_key/edit.dart

@@ -51,6 +51,17 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
     _provider = locator<PrivateKeyProvider>();
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+    _nameController.dispose();
+    _keyController.dispose();
+    _pwdController.dispose();
+    _nameNode.dispose();
+    _keyNode.dispose();
+    _pwdNode.dispose();
+  }
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();

lib/view/page/process.dart

@@ -41,10 +41,6 @@ class _ProcessPageState extends State<ProcessPage> {
   void initState() {
     super.initState();
     _client = _serverProvider.servers[widget.spi.id]?.client;
-    if (_client == null) {
-      showSnackBar(context, Text(_s.noClient));
-      return;
-    }
     _timer = Timer.periodic(const Duration(seconds: 3), (_) => _refresh());
   }
 

lib/view/page/server/edit.dart

@@ -55,6 +55,22 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
     _serverProvider = locator<ServerProvider>();
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+    _nameController.dispose();
+    _ipController.dispose();
+    _alterUrlController.dispose();
+    _portController.dispose();
+    _usernameController.dispose();
+    _passwordController.dispose();
+    _nameFocus.dispose();
+    _ipFocus.dispose();
+    _alterUrlFocus.dispose();
+    _portFocus.dispose();
+    _usernameFocus.dispose();
+  }
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();

lib/view/page/server/tab.dart

@@ -150,12 +150,12 @@ class _ServerPageState extends State<ServerPage>
     return GestureDetector(
       key: Key(si.spi.id + (_tag ?? '')),
       onTap: () {
-        if (si.state == ServerState.connected) {
+        if (si.state.canViewDetails) {
           AppRoute(
             ServerDetailPage(si.spi.id),
             'server detail page',
           ).go(context);
-        } else {
+        } else if (si.status.failedInfo != null) {
           _showFailReason(si.status);
         }
       },
@@ -176,7 +176,7 @@ class _ServerPageState extends State<ServerPage>
     final rootDisk = findRootDisk(ss.disk);
     late final List<Widget> children;
     var height = 23.0;
-    if (cs != ServerState.connected) {
+    if (cs != ServerState.finished) {
       children = [
         _buildServerCardTitle(ss, cs, spi),
       ];
@@ -286,7 +286,7 @@ class _ServerPageState extends State<ServerPage>
       context: context,
       title: Text(_s.error),
       child: SingleChildScrollView(
-        child: Text(ss.failedInfo!),
+        child: Text(ss.failedInfo ?? _s.unknownError),
       ),
       actions: [
         TextButton(
@@ -393,12 +393,16 @@ class _ServerPageState extends State<ServerPage>
     switch (cs) {
       case ServerState.disconnected:
         return _s.disconnected;
-      case ServerState.connected:
+      case ServerState.finished:
         final tempStr = temp == null ? '' : '${temp.toStringAsFixed(1)}°C';
         final items = [tempStr, upTime];
         final str = items.where((element) => element.isNotEmpty).join(' | ');
-        if (str.isEmpty) return _s.serverTabLoading;
+        if (str.isEmpty) return _s.noResult;
         return str;
+      case ServerState.loading:
+        return _s.serverTabLoading;
+      case ServerState.connected:
+        return _s.connected;
       case ServerState.connecting:
         return _s.serverTabConnecting;
       case ServerState.failed:
@@ -409,8 +413,6 @@ class _ServerPageState extends State<ServerPage>
           return _s.serverTabPlzSave;
         }
         return failedInfo;
-      default:
-        return _s.serverTabUnkown;
     }
   }
 

lib/view/page/snippet/edit.dart

@@ -37,6 +37,14 @@ class _SnippetEditPageState extends State<SnippetEditPage>
     _provider = locator<SnippetProvider>();
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+    _nameController.dispose();
+    _scriptController.dispose();
+    _scriptNode.dispose();
+  }
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();

lib/view/page/ssh/term.dart

@@ -68,6 +68,18 @@ class _SSHPageState extends State<SSHPage> {
     _initVirtKeys();
   }
 
+  @override
+  void dispose() {
+    super.dispose();
+    _virtKeyLongPressTimer?.cancel();
+    _terminalController.dispose();
+    _client?.close();
+    // ignore: unnecessary_null_comparison
+    if (_session != null) {
+      _session.close();
+    }
+  }
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
@@ -80,12 +92,6 @@ class _SSHPageState extends State<SSHPage> {
     _virtKeysHeight = _media.size.height * 0.043 * _virtKeysList.length;
   }
 
-  @override
-  void dispose() {
-    _client?.close();
-    super.dispose();
-  }
-
   @override
   Widget build(BuildContext context) {
     Widget child = Scaffold(

lib/view/page/storage/sftp.dart

@@ -49,7 +49,6 @@ class SftpPage extends StatefulWidget {
 
 class _SftpPageState extends State<SftpPage> {
   final SftpBrowserStatus _status = SftpBrowserStatus();
-  final ScrollController _scrollController = ScrollController();
 
   final _sftp = locator<SftpProvider>();
 
@@ -297,7 +296,6 @@ class _SftpPageState extends State<SftpPage> {
         key: Key(widget.spi.name + _status.path!.path),
         child: ListView.builder(
           itemCount: _status.files!.length,
-          controller: _scrollController,
           padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 3),
           itemBuilder: (_, index) => _buildItem(_status.files![index]),
         ),
@@ -458,9 +456,7 @@ class _SftpPageState extends State<SftpPage> {
         TextButton(
           onPressed: () async {
             context.pop();
-            showLoadingDialog(
-              context
-            );
+            showLoadingDialog(context);
             final remotePath = _getRemotePath(file);
             try {
               if (file.attr.isDirectory) {