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

src/Cli/StellaOps.Cli/Commands/CommandHandlers.Feeds.cs

@@ -498,19 +498,6 @@ internal static partial class CommandHandlers
         }
     }
 
-    private static string FormatBytes(long bytes)
-    {
-        string[] sizes = ["B", "KB", "MB", "GB", "TB"];
-        int order = 0;
-        double size = bytes;
-        while (size >= 1024 && order < sizes.Length - 1)
-        {
-            order++;
-            size /= 1024;
-        }
-        return $"{size:0.##} {sizes[order]}";
-    }
-
     // DTO types for JSON deserialization
     private sealed record CreateSnapshotResponse(
         string SnapshotId,