Phase 0 — mechanical rename ZB.MOM.WW.LmxOpcUa.* → ZB.MOM.WW.OtOpcUa.*

Renames all 11 projects (5 src + 6 tests), the .slnx solution file, all source-file namespaces, all axaml namespace references, and all v1 documentation references in CLAUDE.md and docs/*.md (excluding docs/v2/ which is already in OtOpcUa form). Also updates the TopShelf service registration name from "LmxOpcUa" to "OtOpcUa" per Phase 0 Task 0.6.

Preserves runtime identifiers per Phase 0 Out-of-Scope rules to avoid breaking v1/v2 client trust during coexistence: OPC UA `ApplicationUri` defaults (`urn:{GalaxyName}:LmxOpcUa`), server `EndpointPath` (`/LmxOpcUa`), `ServerName` default (feeds cert subject CN), `MxAccessConfiguration.ClientName` default (defensive — stays "LmxOpcUa" for MxAccess audit-trail consistency), client OPC UA identifiers (`ApplicationName = "LmxOpcUaClient"`, `ApplicationUri = "urn:localhost:LmxOpcUaClient"`, cert directory `%LocalAppData%\LmxOpcUaClient\pki\`), and the `LmxOpcUaServer` class name (class rename out of Phase 0 scope per Task 0.5 sed pattern; happens in Phase 1 alongside `LmxNodeManager → GenericDriverNodeManager` Core extraction). 23 LmxOpcUa references retained, all enumerated and justified in `docs/v2/implementation/exit-gate-phase-0.md`.

Build clean: 0 errors, 30 warnings (lower than baseline 167). Tests at strict improvement over baseline: 821 passing / 1 failing vs baseline 820 / 2 (one flaky pre-existing failure passed this run; the other still fails — both pre-existing and unrelated to the rename). `Client.UI.Tests`, `Historian.Aveva.Tests`, `Client.Shared.Tests`, `IntegrationTests` all match baseline exactly. Exit gate compliance results recorded in `docs/v2/implementation/exit-gate-phase-0.md` with all 7 checks PASS or DEFERRED-to-PR-review (#7 service install verification needs Windows service permissions on the reviewer's box).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.OtOpcUa.Client.UI/ViewModels/HistoryViewModel.cs

@@ -0,0 +1,133 @@
+using System.Collections.ObjectModel;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Opc.Ua;
+using ZB.MOM.WW.OtOpcUa.Client.Shared;
+using ZB.MOM.WW.OtOpcUa.Client.Shared.Models;
+using ZB.MOM.WW.OtOpcUa.Client.UI.Services;
+
+namespace ZB.MOM.WW.OtOpcUa.Client.UI.ViewModels;
+
+/// <summary>
+///     ViewModel for the history panel.
+/// </summary>
+public partial class HistoryViewModel : ObservableObject
+{
+    private readonly IUiDispatcher _dispatcher;
+    private readonly IOpcUaClientService _service;
+
+    [ObservableProperty] private DateTimeOffset? _endTime = DateTimeOffset.UtcNow;
+
+    [ObservableProperty] private double _intervalMs = 3600000;
+
+    [ObservableProperty] [NotifyCanExecuteChangedFor(nameof(ReadHistoryCommand))]
+    private bool _isConnected;
+
+    [ObservableProperty] private bool _isLoading;
+
+    [ObservableProperty] private int _maxValues = 1000;
+
+    [ObservableProperty] private AggregateType? _selectedAggregateType;
+
+    [ObservableProperty] [NotifyCanExecuteChangedFor(nameof(ReadHistoryCommand))]
+    private string? _selectedNodeId;
+
+    [ObservableProperty] private DateTimeOffset? _startTime = DateTimeOffset.UtcNow.AddHours(-1);
+
+    public HistoryViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
+    {
+        _service = service;
+        _dispatcher = dispatcher;
+    }
+
+    /// <summary>Available aggregate types (null means "Raw").</summary>
+    public IReadOnlyList<AggregateType?> AggregateTypes { get; } =
+    [
+        null,
+        AggregateType.Average,
+        AggregateType.Minimum,
+        AggregateType.Maximum,
+        AggregateType.Count,
+        AggregateType.Start,
+        AggregateType.End,
+        AggregateType.StandardDeviation
+    ];
+
+    public bool IsAggregateRead => SelectedAggregateType != null;
+
+    /// <summary>History read results.</summary>
+    public ObservableCollection<HistoryValueViewModel> Results { get; } = [];
+
+    partial void OnSelectedAggregateTypeChanged(AggregateType? value)
+    {
+        OnPropertyChanged(nameof(IsAggregateRead));
+    }
+
+    private bool CanReadHistory()
+    {
+        return IsConnected && !string.IsNullOrEmpty(SelectedNodeId);
+    }
+
+    [RelayCommand(CanExecute = nameof(CanReadHistory))]
+    private async Task ReadHistoryAsync()
+    {
+        if (string.IsNullOrEmpty(SelectedNodeId)) return;
+
+        IsLoading = true;
+        _dispatcher.Post(() => Results.Clear());
+
+        try
+        {
+            var nodeId = NodeId.Parse(SelectedNodeId);
+            IReadOnlyList<DataValue> values;
+
+            var start = (StartTime ?? DateTimeOffset.UtcNow.AddHours(-1)).UtcDateTime;
+            var end = (EndTime ?? DateTimeOffset.UtcNow).UtcDateTime;
+
+            if (SelectedAggregateType != null)
+                values = await _service.HistoryReadAggregateAsync(
+                    nodeId,
+                    start,
+                    end,
+                    SelectedAggregateType.Value,
+                    IntervalMs);
+            else
+                values = await _service.HistoryReadRawAsync(
+                    nodeId,
+                    start,
+                    end,
+                    MaxValues);
+
+            _dispatcher.Post(() =>
+            {
+                foreach (var dv in values)
+                    Results.Add(new HistoryValueViewModel(
+                        Helpers.ValueFormatter.Format(dv.Value),
+                        Helpers.StatusCodeFormatter.Format(dv.StatusCode),
+                        dv.SourceTimestamp.ToString("O"),
+                        dv.ServerTimestamp.ToString("O")));
+            });
+        }
+        catch (Exception ex)
+        {
+            _dispatcher.Post(() =>
+            {
+                Results.Add(new HistoryValueViewModel(
+                    $"Error: {ex.Message}", string.Empty, string.Empty, string.Empty));
+            });
+        }
+        finally
+        {
+            _dispatcher.Post(() => IsLoading = false);
+        }
+    }
+
+    /// <summary>
+    ///     Clears results and resets state.
+    /// </summary>
+    public void Clear()
+    {
+        Results.Clear();
+        SelectedNodeId = null;
+    }
+}