Fix for windows power shell command

Add start scripts for Windows and Unix environments that checks if node is...

See merge request proj-wise2526-video2document/video2document!74

services/modules/convert/convert.js

@@ -30,25 +30,28 @@ async function showSaveDialog(defaultName, format) {
             throw err;
         }
     } else if (platform === 'win32') {
-        // Windows
-        const powershell = `
-            Add-Type -AssemblyName System.Windows.Forms
-            $dialog = New-Object System.Windows.Forms.SaveFileDialog
-            $dialog.FileName = "${defaultName}.${format}"
-            $dialog.Filter = "${format.toUpperCase()} Dateien (*.${format})|*.${format}|Alle Dateien (*.*)|*.*"
-            $dialog.Title = "Dokument speichern als"
-            $result = $dialog.ShowDialog()
-            if ($result -eq 'OK') { $dialog.FileName }
-        `;
+    const safeName = decodeURIComponent(defaultName);
 
-        try {
-            const result = execSync(`powershell -Command "${powershell.replace(/\n/g, '; ')}"`, { 
-                encoding: 'utf8' 
-            });
-            return result.trim() || null;
-        } catch (err) {
-            throw err;
-        }
+    const powershell = `
+        Add-Type -AssemblyName System.Windows.Forms;
+        $dialog = New-Object System.Windows.Forms.SaveFileDialog;
+        $dialog.FileName = '${safeName}.${format}';
+        $dialog.Filter = '${format.toUpperCase()} Dateien (*.${format})|*.${format}|Alle Dateien (*.*)|*.*';
+        $dialog.Title = 'Dokument speichern als';
+        $result = $dialog.ShowDialog();
+        if ($result -eq 'OK') { $dialog.FileName }
+    `;
+
+    try {
+        const result = execSync(
+            `powershell -NoProfile -Command "${powershell.replace(/\r?\n/g, ' ')}"`,
+            { encoding: 'utf8' }
+        );
+        return result.trim() || null;
+    } catch (err) {
+        if (err.status === 1) return null; // User cancelled
+        throw new Error("Save dialog failed: " + err.message);
+    }
     } else {
         // Linux - zenity oder kdialog
         try {