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.Client.Shared.Tests/Helpers/ValueConverterTests.cs

@@ -107,4 +107,4 @@ public class ValueConverterTests
     {
         Should.Throw<OverflowException>(() => ValueConverter.ConvertValue("256", (byte)0));
     }
-}
+}