Fix build and code structure improvements. New but essential UI functionality. CI improvements. Documentation improvements. AI module improvements.

fix-xunit-refs.ps1

@@ -0,0 +1,17 @@
+$xunitPackages = @'
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.0.2" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+'@
+
+Get-ChildItem -Path "src" -Filter "*.csproj" -Recurse | Where-Object { $_.Name -like "*.Tests.csproj" } | ForEach-Object {
+    $content = Get-Content $_.FullName -Raw
+    if ($content -match '<IsTestProject>true</IsTestProject>' -and $content -notmatch 'Include="xunit"') {
+        # Find the first ItemGroup with PackageReference and add xunit there
+        if ($content -match '(<ItemGroup>\s*<PackageReference)') {
+            $content = $content -replace '(<ItemGroup>\s*<PackageReference)', "$xunitPackages`n`$1"
+            Set-Content $_.FullName $content -NoNewline
+            Write-Host "Added xunit to: $($_.FullName)"
+        }
+    }
+}