Apply code style formatting and restore partial modifiers on Avalonia views

Linter/formatter pass across the full codebase. Restores required partial
keyword on AXAML code-behind classes that the formatter incorrectly removed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/ZB.MOM.WW.LmxOpcUa.Tests/Security/SecurityProfileResolverTests.cs

@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using System.Linq;
 using Opc.Ua;
 using Shouldly;
 using Xunit;
@@ -134,4 +133,4 @@ namespace ZB.MOM.WW.LmxOpcUa.Tests.Security
             names.Count.ShouldBe(3);
         }
     }
-}
+}