v1.08 — Custom Fluent confirmation dialog, replace all MessageBox

- New ConfirmDialog overlay with dark backdrop, rounded card, shadow
- Warning/Question/Error icon types with accent colors
- Replaced all MessageBox.Show calls (RemovePage, PreInstallCheck, Troubleshoot)
- Click outside dialog = cancel

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

InstaSoftOfficeTool.csproj

@@ -9,9 +9,9 @@
     <Company>InstaSoft Zrt.</Company>
     <Product>InstaSoft Office Tool</Product>
     <Copyright>Copyright (c) InstaSoft Zrt. 2026</Copyright>
-    <Version>1.0.7</Version>
-    <AssemblyVersion>1.0.7.0</AssemblyVersion>
-    <FileVersion>1.0.7.0</FileVersion>
+    <Version>1.0.8</Version>
+    <AssemblyVersion>1.0.8.0</AssemblyVersion>
+    <FileVersion>1.0.8.0</FileVersion>
     <ApplicationManifest>app.manifest</ApplicationManifest>
     <LangVersion>latest</LangVersion>
   </PropertyGroup>