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

src/__Libraries/__Tests/StellaOps.Provcache.Tests/EvidenceChunkerTests.cs

@@ -1,4 +1,4 @@
-using FluentAssertions;
+using FluentAssertions;
 using StellaOps.Provcache;
 using Xunit;
 
@@ -259,7 +259,6 @@ public sealed class EvidenceChunkerTests
         var evidence = new byte[200];
         Random.Shared.NextBytes(evidence);
         using var stream = new MemoryStream(evidence);
-using StellaOps.TestKit;
         const string contentType = "application/octet-stream";
 
         // Act