Fix empty latency tests and Linux startup errors (#10335)

* Fix overflow when speed tests have no eligible profiles

* Preserve core executable permissions in Debian packages

* Avoid requesting an icon refresh before view initialization

v2rayN/ServiceLib/Common/Utils.cs

@@ -1441,7 +1441,11 @@ public class Utils
             if (File.Exists(fileName))
             {
                 var currentMode = File.GetUnixFileMode(fileName);
-                File.SetUnixFileMode(fileName, currentMode | UnixFileMode.UserExecute | UnixFileMode.GroupExecute | UnixFileMode.OtherExecute);
+                var executableMode = currentMode | UnixFileMode.UserExecute | UnixFileMode.GroupExecute | UnixFileMode.OtherExecute;
+                if (currentMode != executableMode)
+                {
+                    File.SetUnixFileMode(fileName, executableMode);
+                }
                 return true;
             }
         }

v2rayN/ServiceLib/Services/SpeedtestService.cs

@@ -587,6 +587,12 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
     private List<List<ServerTestItem>> GetTestBatchItem(List<ServerTestItem> lstSelected, int pageSize)
     {
         List<List<ServerTestItem>> lstTest = [];
+        if (lstSelected.Count == 0)
+        {
+            return lstTest;
+        }
+
+        pageSize = Math.Max(pageSize, 1);
         var lst1 = lstSelected.Where(t => t.CoreType == ECoreType.Xray).ToList();
         var lst2 = lstSelected.Where(t => t.CoreType == ECoreType.sing_box).ToList();
 

v2rayN/ServiceLib/ViewModels/StatusBarViewModel.cs

@@ -219,7 +219,8 @@ public partial class StatusBarViewModel : MyReactiveObject
         await ConfigHandler.InitBuiltinRouting(_config);
         await RefreshRoutingsMenu();
         await InboundDisplayStatus();
-        await ChangeSystemProxyAsync(_config.SystemProxyItem.SysProxyType, true);
+        // The view refreshes its icon on initialization; interaction handlers are not registered yet.
+        await ChangeSystemProxyAsync(_config.SystemProxyItem.SysProxyType, false);
 
         BlRouting = true;
     }