fix: Unable to obtain Windows server information

lib/core/extension/ssh_client.dart

@@ -4,6 +4,7 @@ import 'dart:typed_data';
 import 'package:dartssh2/dartssh2.dart';
 import 'package:fl_lib/fl_lib.dart';
 import 'package:flutter/widgets.dart';
+import 'package:server_box/data/helper/ssh_decoder.dart';
 import 'package:server_box/data/model/server/system.dart';
 
 import 'package:server_box/data/res/misc.dart';
@@ -170,4 +171,98 @@ extension SSHClientX on SSHClient {
     );
     return ret.$2;
   }
+
+  /// Runs a command and decodes output safely with encoding fallback
+  ///
+  /// [systemType] - The system type (affects encoding choice)
+  /// Runs a command and safely decodes the result
+  Future<String> runSafe(
+    String command, {
+    SystemType? systemType,
+    String? context,
+  }) async {
+    // Let SSH errors propagate with their original type (e.g., SSHError subclasses)
+    final result = await run(command);
+
+    // Only catch decoding failures and add context
+    try {
+      return SSHDecoder.decode(
+        result,
+        isWindows: systemType == SystemType.windows,
+        context: context,
+      );
+    } on FormatException catch (e) {
+      throw Exception(
+        'Failed to decode command output${context != null ? " [$context]" : ""}: $e',
+      );
+    }
+  }
+
+  /// Executes a command with stdin and safely decodes stdout/stderr
+  Future<(String stdout, String stderr)> execSafe(
+    void Function(SSHSession session) callback, {
+    required String entry,
+    SystemType? systemType,
+    String? context,
+  }) async {
+    final stdoutBuilder = BytesBuilder(copy: false);
+    final stderrBuilder = BytesBuilder(copy: false);
+    final stdoutDone = Completer<void>();
+    final stderrDone = Completer<void>();
+
+    final session = await execute(entry);
+
+    session.stdout.listen(
+      (e) {
+        stdoutBuilder.add(e);
+      },
+      onDone: stdoutDone.complete,
+      onError: stdoutDone.completeError,
+    );
+
+    session.stderr.listen(
+      (e) {
+        stderrBuilder.add(e);
+      },
+      onDone: stderrDone.complete,
+      onError: stderrDone.completeError,
+    );
+
+    callback(session);
+
+    await stdoutDone.future;
+    await stderrDone.future;
+
+    final stdoutBytes = stdoutBuilder.takeBytes();
+    final stderrBytes = stderrBuilder.takeBytes();
+
+    // Only catch decoding failures, let other errors propagate
+    String stdout;
+    try {
+      stdout = SSHDecoder.decode(
+        stdoutBytes,
+        isWindows: systemType == SystemType.windows,
+        context: context != null ? '$context (stdout)' : 'stdout',
+      );
+    } on FormatException catch (e) {
+      throw Exception(
+        'Failed to decode stdout${context != null ? " [$context]" : ""}: $e',
+      );
+    }
+
+    String stderr;
+    try {
+      stderr = SSHDecoder.decode(
+        stderrBytes,
+        isWindows: systemType == SystemType.windows,
+        context: context != null ? '$context (stderr)' : 'stderr',
+      );
+    } on FormatException catch (e) {
+      throw Exception(
+        'Failed to decode stderr${context != null ? " [$context]" : ""}: $e',
+      );
+    }
+
+    return (stdout, stderr);
+  }
 }

lib/data/helper/ssh_decoder.dart

@@ -0,0 +1,66 @@
+import 'dart:convert';
+
+import 'package:fl_lib/fl_lib.dart';
+import 'package:flutter_gbk2utf8/flutter_gbk2utf8.dart';
+
+/// Utility class for decoding SSH command output with encoding fallback
+class SSHDecoder {
+  /// Decodes bytes to string with multiple encoding fallback strategies
+  ///
+  /// Tries in order:
+  /// 1. UTF-8 (with allowMalformed for lenient parsing)
+  ///    - Windows PowerShell scripts now set UTF-8 output encoding by default
+  /// 2. GBK (for Windows Chinese systems)
+  ///    - In some cases, Windows will still revert to GBK.
+  ///    - Only attempted if UTF-8 produces replacement characters (�)
+  static String decode(
+    List<int> bytes, {
+    bool isWindows = false,
+    String? context,
+  }) {
+    if (bytes.isEmpty) return '';
+
+    // Try UTF-8 first with allowMalformed
+    try {
+      final result = utf8.decode(bytes, allowMalformed: true);
+      // Check if there are replacement characters indicating decode failure
+      // For non-Windows systems, always use UTF-8 result
+      if (!result.contains('�') || !isWindows) {
+        return result;
+      }
+      // For Windows with replacement chars, log and try GBK fallback
+      if (isWindows && result.contains('�')) {
+        final contextInfo = context != null ? ' [$context]' : '';
+        Loggers.app.info('UTF-8 decode has replacement chars$contextInfo, trying GBK fallback');
+      }
+    } catch (e) {
+      final contextInfo = context != null ? ' [$context]' : '';
+      Loggers.app.warning('UTF-8 decode failed$contextInfo: $e');
+    }
+
+    // For Windows or when UTF-8 has replacement chars, try GBK
+    try {
+      return gbk.decode(bytes);
+    } catch (e) {
+      final contextInfo = context != null ? ' [$context]' : '';
+      Loggers.app.warning('GBK decode failed$contextInfo: $e');
+      // Return empty string if all decoding attempts fail
+      return '';
+    }
+  }
+
+  /// Encodes string to bytes for SSH command input
+  ///
+  /// Uses GBK for Windows, UTF-8 for others
+  static List<int> encode(String text, {bool isWindows = false}) {
+    if (isWindows) {
+      try {
+        return gbk.encode(text);
+      } catch (e) {
+        Loggers.app.warning('GBK encode failed: $e, falling back to UTF-8');
+        return utf8.encode(text);
+      }
+    }
+    return utf8.encode(text);
+  }
+}

lib/data/helper/system_detector.dart

@@ -1,5 +1,6 @@
 import 'package:dartssh2/dartssh2.dart';
 import 'package:fl_lib/fl_lib.dart';
+import 'package:server_box/core/extension/ssh_client.dart';
 import 'package:server_box/data/model/server/server_private_info.dart';
 import 'package:server_box/data/model/server/system.dart';
 
@@ -23,7 +24,10 @@ class SystemDetector {
 
     try {
       // Try to detect Unix/Linux/BSD systems first (more reliable and doesn't create files)
-      final unixResult = await client.run('uname -a 2>/dev/null').string;
+      final unixResult = await client.runSafe(
+        'uname -a 2>/dev/null',
+        context: 'uname detection for ${spi.oldId}',
+      );
       if (unixResult.contains('Linux')) {
         detectedSystemType = SystemType.linux;
         dprint('Detected Linux system type for ${spi.oldId}');
@@ -35,15 +39,19 @@ class SystemDetector {
       }
 
       // If uname fails, try to detect Windows systems
-      final powershellResult = await client.run('ver 2>nul').string;
+      final powershellResult = await client.runSafe(
+        'ver 2>nul',
+        systemType: SystemType.windows,
+        context: 'ver detection for ${spi.oldId}',
+      );
       if (powershellResult.isNotEmpty &&
           (powershellResult.contains('Windows') || powershellResult.contains('NT'))) {
         detectedSystemType = SystemType.windows;
         dprint('Detected Windows system type for ${spi.oldId}');
         return detectedSystemType;
       }
-    } catch (e) {
-      Loggers.app.warning('System detection failed for ${spi.oldId}: $e');
+    } catch (e, stackTrace) {
+      Loggers.app.warning('System detection failed for ${spi.oldId}: $e\n$stackTrace');
     }
 
     // Default fallback

lib/data/model/app/scripts/cmd_types.dart

@@ -166,25 +166,36 @@ enum WindowsStatusCmdType implements ShellCmdType {
   echo('echo ${SystemType.windowsSign}'),
   time('[DateTimeOffset]::UtcNow.ToUnixTimeSeconds()'),
 
-  /// Get network interface statistics using Windows Performance Counters
+  /// Get network interface statistics using WMI
   ///
-  /// Uses Get-Counter to collect network I/O metrics from all network interfaces:
-  /// - Collects bytes received and sent per second for all network interfaces
+  /// Uses WMI Win32_PerfRawData_Tcpip_NetworkInterface for cross-language compatibility:
   /// - Takes 2 samples with 1 second interval to calculate rates
-  /// - Outputs results in JSON format for easy parsing
-  /// - Counter paths use double backslashes to escape PowerShell string literals
   net(
-    r'Get-Counter -Counter '
-    r'"\\NetworkInterface(*)\\Bytes Received/sec", '
-    r'"\\NetworkInterface(*)\\Bytes Sent/sec" '
-    r'-SampleInterval 1 -MaxSamples 2 | ConvertTo-Json',
+    r'$s1 = @(Get-WmiObject Win32_PerfRawData_Tcpip_NetworkInterface | '
+    r'Select-Object Name, BytesReceivedPersec, BytesSentPersec, Timestamp_Sys100NS); '
+    r'Start-Sleep -Seconds 1; '
+    r'$s2 = @(Get-WmiObject Win32_PerfRawData_Tcpip_NetworkInterface | '
+    r'Select-Object Name, BytesReceivedPersec, BytesSentPersec, Timestamp_Sys100NS); '
+    r'@($s1, $s2) | ConvertTo-Json -Depth 5',
   ),
   sys('(Get-ComputerInfo).OsName'),
   cpu(
     'Get-WmiObject -Class Win32_Processor | '
-    'Select-Object Name, LoadPercentage | ConvertTo-Json',
+    'Select-Object Name, LoadPercentage, NumberOfCores, NumberOfLogicalProcessors | ConvertTo-Json',
+  ),
+
+  /// Get system uptime by calculating time since last boot
+  ///
+  /// Calculates uptime directly in PowerShell to avoid date format parsing issues:
+  /// - Gets LastBootUpTime from Win32_OperatingSystem
+  /// - Calculates difference from current time
+  /// - Returns pre-formatted string: "X days, H:MM" or "H:MM" (if less than 1 day)
+  /// - Uses ToString('00') for zero-padding to avoid quote escaping issues
+  uptime(
+    r'$up = (Get-Date) - (Get-CimInstance Win32_OperatingSystem).LastBootUpTime; '
+    r'if ($up.Days -gt 0) { "$($up.Days) days, $($up.Hours):$($up.Minutes.ToString(''00''))" } '
+    r'else { "$($up.Hours):$($up.Minutes.ToString(''00''))" }',
   ),
-  uptime('(Get-CimInstance -ClassName Win32_OperatingSystem).LastBootUpTime'),
   conn('(netstat -an | findstr ESTABLISHED | Measure-Object -Line).Count'),
   disk(
     'Get-WmiObject -Class Win32_LogicalDisk | '
@@ -213,19 +224,19 @@ enum WindowsStatusCmdType implements ShellCmdType {
   ),
   host(r'Write-Output $env:COMPUTERNAME'),
 
-  /// Get disk I/O statistics using Windows Performance Counters
+  /// Get disk I/O statistics using WMI
   ///
-  /// Uses Get-Counter to collect disk I/O metrics from all physical disks:
+  /// Uses WMI Win32_PerfRawData_PerfDisk_PhysicalDisk:
   /// - Monitors read and write bytes per second for all physical disks
-  /// - Takes 2 samples with 1 second interval to calculate I/O rates
-  /// - Physical disk counters provide hardware-level I/O statistics
-  /// - Outputs results in JSON format for parsing
-  /// - Counter names use wildcard (*) to capture all disk instances
+  /// - Takes 2 samples with 1 second interval to calculate rates
+  /// - DiskReadBytesPersec and DiskWriteBytesPersec are cumulative counters
   diskio(
-    r'Get-Counter -Counter '
-    r'"\\PhysicalDisk(*)\\Disk Read Bytes/sec", '
-    r'"\\PhysicalDisk(*)\\Disk Write Bytes/sec" '
-    r'-SampleInterval 1 -MaxSamples 2 | ConvertTo-Json',
+    r'$s1 = @(Get-WmiObject Win32_PerfRawData_PerfDisk_PhysicalDisk | '
+    r'Select-Object Name, DiskReadBytesPersec, DiskWriteBytesPersec, Timestamp_Sys100NS); '
+    r'Start-Sleep -Seconds 1; '
+    r'$s2 = @(Get-WmiObject Win32_PerfRawData_PerfDisk_PhysicalDisk | '
+    r'Select-Object Name, DiskReadBytesPersec, DiskWriteBytesPersec, Timestamp_Sys100NS); '
+    r'@($s1, $s2) | ConvertTo-Json -Depth 5',
   ),
   battery(
     'Get-WmiObject -Class Win32_Battery | '
@@ -287,7 +298,7 @@ enum WindowsStatusCmdType implements ShellCmdType {
   String get separator => ScriptConstants.getCmdSeparator(name);
 
   @override
-  String get divider => ScriptConstants.getCmdDivider(name);
+  String get divider => ScriptConstants.getWindowsCmdDivider(name);
 
   @override
   CmdTypeSys get sysType => CmdTypeSys.windows;

lib/data/model/app/scripts/script_consts.dart

@@ -29,6 +29,9 @@ class ScriptConstants {
   /// Generate command-specific divider
   static String getCmdDivider(String cmdName) => '\necho ${getCmdSeparator(cmdName)}\n\t';
 
+  /// Generate command-specific divider for Windows PowerShell
+  static String getWindowsCmdDivider(String cmdName) => '\n    Write-Host "${getCmdSeparator(cmdName)}"\n    ';
+
   /// Parse script output into command-specific map
   static Map<String, String> parseScriptOutput(String raw) {
     final result = <String, String>{};
@@ -102,6 +105,7 @@ exec 2>/dev/null
 # DO NOT delete this file while app is running
 
 \$ErrorActionPreference = "SilentlyContinue"
+[Console]::OutputEncoding = [System.Text.Encoding]::UTF8
 
 ''';
 }

lib/data/model/server/cpu.dart

@@ -14,13 +14,20 @@ class Cpus extends TimeSeq<List<SingleCpuCore>> {
   @override
   void onUpdate() {
     _coresCount = now.length;
+    if (pre.isEmpty || now.isEmpty || pre.length != now.length) {
+      _totalDelta = 0;
+      _user = 0;
+      _sys = 0;
+      _iowait = 0;
+      _idle = 0;
+      return;
+    }
     _totalDelta = now[0].total - pre[0].total;
     _user = _getUser();
     _sys = _getSys();
     _iowait = _getIowait();
     _idle = _getIdle();
     _updateSpots();
-    //_updateRange();
   }
 
   double usedPercent({int coreIdx = 0}) {