fix(ui): Version im About-Dialog aus der FileVersion lesen

MinVer setzt die AssemblyVersion auf {Major}.0.0.0 (Binding-Kompatibilitaet),
darum zeigte der Dialog immer "2.0.0". Die echte Major.Minor.Patch steckt in
der FileVersion.

src/ClaudeDo.Ui/ViewModels/Modals/AboutModalViewModel.cs

@@ -1,3 +1,5 @@
+using System;
+using System.Diagnostics;
 using System.IO;
 using System.Reflection;
 using ClaudeDo.Data;
@@ -10,8 +12,14 @@ namespace ClaudeDo.Ui.ViewModels.Modals;
 
 public sealed partial class AboutModalViewModel : ViewModelBase
 {
+    // MinVer sets AssemblyVersion to {Major}.0.0.0 for binding compat — Assembly.GetName().Version
+    // shows "2.0.0" no matter the release. FileVersion carries the real Major.Minor.Patch.
     public string AppVersion { get; } =
-        Assembly.GetExecutingAssembly().GetName().Version?.ToString(3) ?? "0.0.0";
+        Version.TryParse(
+            FileVersionInfo.GetVersionInfo(Assembly.GetExecutingAssembly().Location).FileVersion,
+            out var version)
+            ? version.ToString(3)
+            : "0.0.0";
     public string DataFolderPath { get; } = Paths.AppDataRoot();
     public string LogsFolderPath { get; } = Path.Combine(Paths.AppDataRoot(), "logs");
     public string WorkerConfigPath { get; } = Path.Combine(Paths.AppDataRoot(), "worker.config.json");