v1.05 — Fix primary button text contrast (white on blue)

- Removed Foreground from global TextBlock style (was overriding inherited colors)
- Set TextElement.Foreground on Window level for default text color
- PrimaryButton TextElement.Foreground now properly inherits white

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>1.0.4</Version>
-    <AssemblyVersion>1.0.4.0</AssemblyVersion>
-    <FileVersion>1.0.4.0</FileVersion>
+    <Version>1.0.5</Version>
+    <AssemblyVersion>1.0.5.0</AssemblyVersion>
+    <FileVersion>1.0.5.0</FileVersion>
     <ApplicationManifest>app.manifest</ApplicationManifest>
     <LangVersion>latest</LangVersion>
   </PropertyGroup>