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/SecurityProfileConfigurationTests.cs

@@ -49,4 +49,4 @@ namespace ZB.MOM.WW.LmxOpcUa.Tests.Security
             config.CertificateSubject.ShouldBeNull();
         }
     }
-}
+}