os detection

src/main/java/cz/kamma/kfmanager/MainApp.java

@@ -17,13 +17,32 @@ public class MainApp {
 
     public static final String APP_VERSION = "0.0.9";
     
+    public enum OS {
+        WINDOWS, LINUX, MACOS, UNKNOWN
+    }
+
+    public static final OS CURRENT_OS;
+
+    static {
+        String os = System.getProperty("os.name").toLowerCase();
+        if (os.contains("win")) {
+            CURRENT_OS = OS.WINDOWS;
+        } else if (os.contains("nix") || os.contains("nux") || os.contains("aix")) {
+            CURRENT_OS = OS.LINUX;
+        } else if (os.contains("mac")) {
+            CURRENT_OS = OS.MACOS;
+        } else {
+            CURRENT_OS = OS.UNKNOWN;
+        }
+    }
+    
     public static void main(String[] args) {
         // Set application name for X11/Wayland WM_CLASS
         System.setProperty("awt.app.name", "cz-kamma-kfmanager-MainApp");
         
         // Use FlatLaf for modern look and better system theme support
         try {
-            if (System.getProperty("os.name").toLowerCase().contains("win")) {
+            if (CURRENT_OS == OS.WINDOWS) {
                 // On Windows, use FlatLaf and detect system theme (light/dark)
                 if (isWindowsDarkMode()) {
                     FlatDarkLaf.setup();

src/main/java/cz/kamma/kfmanager/ui/FilePanel.java

@@ -1,5 +1,6 @@
 package cz.kamma.kfmanager.ui;
 
+import cz.kamma.kfmanager.MainApp;
 import cz.kamma.kfmanager.model.FileItem;
 
 import javax.swing.*;
@@ -468,8 +469,7 @@ public class FilePanel extends JPanel {
             driveSet.add(new File(System.getProperty("user.home")));
             
             // On Linux/Unix, add common mount points
-            String os = System.getProperty("os.name").toLowerCase();
+            if (MainApp.CURRENT_OS != MainApp.OS.WINDOWS) {
-            if (!os.contains("win")) {
                 // Common Linux/Unix mount points
                 String user = System.getProperty("user.name");
                 

src/main/java/cz/kamma/kfmanager/ui/FilePanelTab.java

@@ -1,5 +1,6 @@
 package cz.kamma.kfmanager.ui;
 
+import cz.kamma.kfmanager.MainApp;
 import cz.kamma.kfmanager.model.FileItem;
 import cz.kamma.kfmanager.config.AppConfig;
 import cz.kamma.kfmanager.service.ClipboardService;
@@ -1465,12 +1466,11 @@ public class FilePanelTab extends JPanel {
             try {
                 new ProcessBuilder(cmdList).directory(file.getParentFile()).start();
             } catch (IOException ex) {
-                String osName = System.getProperty("os.name").toLowerCase();
+                if (MainApp.CURRENT_OS == MainApp.OS.WINDOWS) {
-                if (osName.contains("win")) {
                     // Try via cmd.exe for Windows shell commands/scripts
                     new ProcessBuilder("cmd", "/c", trimmedCmd + (hasPlaceholder ? "" : " \"" + fullPath + "\""))
                         .directory(file.getParentFile()).start();
-                } else if (osName.contains("linux") || osName.contains("mac")) {
+                } else if (MainApp.CURRENT_OS == MainApp.OS.LINUX || MainApp.CURRENT_OS == MainApp.OS.MACOS) {
                     new ProcessBuilder("sh", "-c", trimmedCmd + (hasPlaceholder ? "" : " '" + fullPath + "'"))
                         .directory(file.getParentFile()).start();
                 } else {
@@ -1668,11 +1668,10 @@ public class FilePanelTab extends JPanel {
         setMenuItemEnabled(revealItem, !isParentDir);
         revealItem.addActionListener(ae -> {
             try {
-                String os = System.getProperty("os.name").toLowerCase();
                 File f = item.getFile();
-                if (os.contains("win")) {
+                if (MainApp.CURRENT_OS == MainApp.OS.WINDOWS) {
                     new ProcessBuilder("explorer.exe", "/select,", f.getAbsolutePath()).start();
-                } else if (os.contains("mac")) {
+                } else if (MainApp.CURRENT_OS == MainApp.OS.MACOS) {
                     new ProcessBuilder("open", "-R", f.getAbsolutePath()).start();
                 } else {
                     File parent = f.getParentFile();

src/main/java/cz/kamma/kfmanager/ui/MainWindow.java

@@ -33,7 +33,7 @@ public class MainWindow extends JFrame {
     private Timer autoRefreshTimer;
     
     public MainWindow() {
-        super("KF Manager v" + MainApp.APP_VERSION);
+        super("KF Manager v" + MainApp.APP_VERSION + " (" + MainApp.CURRENT_OS + ")");
         
         // Set application icon
         loadAppIcon();
@@ -2147,13 +2147,12 @@ public class MainWindow extends JFrame {
         }
         
         try {
-            String osName = System.getProperty("os.name").toLowerCase();
             ProcessBuilder pb = null;
             
-            if (osName.contains("win")) {
+            if (MainApp.CURRENT_OS == MainApp.OS.WINDOWS) {
                 // Windows - open cmd.exe
                 pb = new ProcessBuilder("cmd.exe", "/c", "start", "cmd.exe");
-            } else if (osName.contains("mac")) {
+            } else if (MainApp.CURRENT_OS == MainApp.OS.MACOS) {
                 // macOS
                 pb = new ProcessBuilder("open", "-a", "Terminal", currentDir.getAbsolutePath());
             } else {
@@ -2268,12 +2267,11 @@ public class MainWindow extends JFrame {
             currentDir = new File(System.getProperty("user.home"));
         }
 
-        String osName = System.getProperty("os.name").toLowerCase();
         try {
             String trimmedCmd = command.trim();
 
             // Special case for Windows terminal commands - launch in a new window
-            if (osName.contains("win")) {
+            if (MainApp.CURRENT_OS == MainApp.OS.WINDOWS) {
                 String cmdLower = trimmedCmd.toLowerCase();
                 if (cmdLower.equals("cmd") || cmdLower.equals("powershell") || 
                     cmdLower.equals("pwsh") || cmdLower.equals("wt")) {
@@ -2305,9 +2303,9 @@ public class MainWindow extends JFrame {
                 new ProcessBuilder(cmdList).directory(currentDir).start();
             } catch (IOException ex) {
                 // Fallback for different OS: try via shell
-                if (osName.contains("linux") || osName.contains("mac")) {
+                if (MainApp.CURRENT_OS == MainApp.OS.LINUX || MainApp.CURRENT_OS == MainApp.OS.MACOS) {
                     new ProcessBuilder("sh", "-c", command).directory(currentDir).start();
-                } else if (osName.contains("win")) {
+                } else if (MainApp.CURRENT_OS == MainApp.OS.WINDOWS) {
                     new ProcessBuilder("cmd", "/c", command).directory(currentDir).start();
                 } else {
                     throw ex;