Upgrade Avalonia 11.2.6 -> 11.3.12, FluentAvaloniaUI -> 2.4.1

- Avalonia 11.3.12 is latest stable (fixes Android assembly path bugs)
- FluentAvaloniaUI 2.4.1 supports Avalonia >= 11.2.5 on net6.0+
- All four projects upgraded consistently
- Desktop build verified: 0 errors, 31 warnings (all from submodule)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: sharpninja

src/RequestTracker.Android/RequestTracker.Android.csproj

@@ -19,11 +19,11 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Avalonia" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Android" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.2.6" />
-    <PackageReference Include="FluentAvaloniaUI" Version="2.3.0" />
+    <PackageReference Include="Avalonia" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Android" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.12" />
+    <PackageReference Include="FluentAvaloniaUI" Version="2.4.1" />
     <PackageReference Include="GitVersion.MsBuild" Version="6.6.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>

src/RequestTracker.Core/RequestTracker.Core.csproj

@@ -10,11 +10,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Avalonia" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.2.6" />
+    <PackageReference Include="Avalonia" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.3.12" />
     <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.1" />
-    <PackageReference Include="FluentAvaloniaUI" Version="2.2.0" />
+    <PackageReference Include="FluentAvaloniaUI" Version="2.4.1" />
     <PackageReference Include="Handlebars.Net" Version="2.1.6" />
     <PackageReference Include="YamlDotNet" Version="15.1.0" />
   </ItemGroup>

src/RequestTracker.Desktop/RequestTracker.Desktop.csproj

@@ -17,11 +17,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Avalonia" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Desktop" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Diagnostics" Version="11.2.6">
+    <PackageReference Include="Avalonia" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Diagnostics" Version="11.3.12">
       <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets>
       <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
     </PackageReference>

src/RequestTracker/RequestTracker.csproj

@@ -25,13 +25,13 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Avalonia" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Desktop" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.2.6" />
-    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.2.6" />
+    <PackageReference Include="Avalonia" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.3.12" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.12" />
     <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
-    <PackageReference Include="Avalonia.Diagnostics" Version="11.2.6">
+    <PackageReference Include="Avalonia.Diagnostics" Version="11.3.12">
       <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets>
       <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
     </PackageReference>