v1.07 — Pre-install Office check before installation

- New PreInstallCheckPage between Summary and Progress
- Detects existing Office installs, offers removal before new install
- License cleanup option included
- Skip button to proceed without removal
- Auto-proceeds to install after removal completes

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Pages/PreInstallCheckPage.xaml.cs

@@ -0,0 +1,139 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Windows;
+using System.Windows.Controls;
+using InstaSoftOfficeTool.Models;
+using InstaSoftOfficeTool.Services;
+
+namespace InstaSoftOfficeTool.Pages
+{
+    public partial class PreInstallCheckPage : Page
+    {
+        private readonly MainWindow _main;
+        private List<InstalledOffice> _detected;
+
+        public PreInstallCheckPage(MainWindow main)
+        {
+            InitializeComponent();
+            _main = main;
+            Loaded += (s, e) => DetectOffice();
+        }
+
+        private void DetectOffice()
+        {
+            _detected = OfficeDetector.Detect();
+            OfficeListPanel.Children.Clear();
+
+            if (_detected.Count == 0)
+            {
+                SubtitleText.Text = "Nincs kor\u00e1bbi Office telep\u00edt\u00e9s a g\u00e9pen.";
+                NoOfficeCard.Visibility = Visibility.Visible;
+                BtnRemove.Visibility = Visibility.Collapsed;
+                LicenseCleanupPanel.Visibility = Visibility.Collapsed;
+                BtnSkip.Content = "Tov\u00e1bb a telep\u00edt\u00e9shez \u2192";
+                return;
+            }
+
+            SubtitleText.Text = "A sz\u00e1m\u00edt\u00f3g\u00e9pen tal\u00e1lt Office telep\u00edt\u00e9sek. Az \u00faj Office telep\u00edt\u00e9se el\u0151tt aj\u00e1nlott elt\u00e1vol\u00edtani.";
+            BtnRemove.Visibility = Visibility.Visible;
+            LicenseCleanupPanel.Visibility = Visibility.Visible;
+
+            foreach (var office in _detected)
+            {
+                var cb = new CheckBox
+                {
+                    Content = office.DisplayName +
+                        (string.IsNullOrEmpty(office.Version) ? "" : "  (" + office.Version + ")"),
+                    IsChecked = true,
+                    Style = (Style)FindResource("FluentCheckBox"),
+                    Tag = office,
+                    Margin = new Thickness(0, 4, 0, 4),
+                    FontSize = 14
+                };
+                OfficeListPanel.Children.Add(cb);
+            }
+        }
+
+        private void BtnSkip_Click(object sender, RoutedEventArgs e)
+        {
+            _main.ProceedToInstall();
+        }
+
+        private async void BtnRemove_Click(object sender, RoutedEventArgs e)
+        {
+            BtnRemove.IsEnabled = false;
+            BtnSkip.IsEnabled = false;
+            LogPanel.Visibility = Visibility.Visible;
+
+            bool hasC2R = false;
+            foreach (UIElement child in OfficeListPanel.Children)
+            {
+                if (child is CheckBox cb && cb.IsChecked == true)
+                {
+                    var office = (InstalledOffice)cb.Tag;
+                    if (office.IsClickToRun)
+                    {
+                        hasC2R = true;
+                    }
+                    else if (!string.IsNullOrEmpty(office.ProductCode))
+                    {
+                        AppendLog("MSI elt\u00e1vol\u00edt\u00e1s: " + office.DisplayName);
+                        var runner = new ProcessRunner();
+                        runner.OutputReceived += msg => Dispatcher.Invoke(() => AppendLog(msg));
+                        await runner.RunAsync("msiexec", "/x " + office.ProductCode + " /qb");
+                    }
+                }
+            }
+
+            if (hasC2R)
+            {
+                AppendLog("Click-to-Run Office elt\u00e1vol\u00edt\u00e1sa...");
+                var downloader = new OdtDownloader();
+                downloader.StatusChanged += msg => Dispatcher.Invoke(() => AppendLog(msg));
+
+                bool ok = await downloader.DownloadAndExtractAsync();
+                if (ok)
+                {
+                    string removeXml = OdtXmlGenerator.GenerateRemoveAll();
+                    string xmlPath = Path.Combine(downloader.OdtFolder, "remove.xml");
+                    File.WriteAllText(xmlPath, removeXml);
+
+                    int exitCode = await downloader.RunRemoveAsync(xmlPath,
+                        msg => Dispatcher.Invoke(() => AppendLog(msg)));
+
+                    AppendLog(exitCode == 0
+                        ? "Office sikeresen elt\u00e1vol\u00edtva."
+                        : "Elt\u00e1vol\u00edt\u00e1s befejez\u0151d\u00f6tt (k\u00f3d: " + exitCode + ")");
+                }
+            }
+
+            if (CbCleanLicense.IsChecked == true)
+            {
+                AppendLog("Licenc-adatb\u00e1zis tiszt\u00edt\u00e1sa...");
+                var lm = new LicenseManager();
+                if (lm.FindOspp())
+                {
+                    var cleanResult = await lm.RemoveAllKeysAsync();
+                    AppendLog(cleanResult);
+                }
+                else
+                {
+                    AppendLog("Az ospp.vbs nem tal\u00e1lhat\u00f3 \u2014 licenc-tiszt\u00edt\u00e1s kihagyva.");
+                }
+            }
+
+            AppendLog("K\u00e9sz. Tov\u00e1bbl\u00e9p\u00e9s az \u00faj Office telep\u00edt\u00e9s\u00e9hez...");
+
+            // Auto-proceed to install after short delay
+            await System.Threading.Tasks.Task.Delay(1500);
+            _main.ProceedToInstall();
+        }
+
+        private void AppendLog(string text)
+        {
+            LogText.Text += DateTime.Now.ToString("HH:mm:ss") + "  " + text + "\n";
+            LogText.ScrollToEnd();
+        }
+    }
+}