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.UI.Tests/HistoryViewModelTests.cs

@@ -17,15 +17,15 @@ public class HistoryViewModelTests
     {
         _service = new FakeOpcUaClientService
         {
-            HistoryRawResult = new[]
-            {
+            HistoryRawResult =
+            [
                 new DataValue(new Variant(10), StatusCodes.Good, DateTime.UtcNow, DateTime.UtcNow),
                 new DataValue(new Variant(20), StatusCodes.Good, DateTime.UtcNow, DateTime.UtcNow)
-            },
-            HistoryAggregateResult = new[]
-            {
+            ],
+            HistoryAggregateResult =
+            [
                 new DataValue(new Variant(15.0), StatusCodes.Good, DateTime.UtcNow, DateTime.UtcNow)
-            }
+            ]
         };
         var dispatcher = new SynchronousUiDispatcher();
         _vm = new HistoryViewModel(_service, dispatcher);
@@ -157,4 +157,4 @@ public class HistoryViewModelTests
         _vm.Results.Count.ShouldBe(1);
         _vm.Results[0].Value.ShouldContain("History not supported");
     }
-}
+}