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/AlarmEventViewModel.cs

@@ -0,0 +1,99 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace ZB.MOM.WW.OtOpcUa.Client.UI.ViewModels;
+
+/// <summary>
+///     Represents a single alarm event row.
+/// </summary>
+public class AlarmEventViewModel : ObservableObject
+{
+    /// <summary>
+    /// Creates an alarm row model from an OPC UA condition event so the alarms tab can display and acknowledge it.
+    /// </summary>
+    /// <param name="sourceName">The source object or variable name associated with the alarm.</param>
+    /// <param name="conditionName">The OPC UA condition name reported by the server.</param>
+    /// <param name="severity">The alarm severity value presented to the operator.</param>
+    /// <param name="message">The alarm message text shown in the UI.</param>
+    /// <param name="retain">Indicates whether the server is retaining the alarm condition.</param>
+    /// <param name="activeState">Indicates whether the alarm is currently active.</param>
+    /// <param name="ackedState">Indicates whether the alarm has already been acknowledged.</param>
+    /// <param name="time">The event timestamp associated with the alarm state.</param>
+    /// <param name="eventId">The OPC UA event identifier used for acknowledgment calls.</param>
+    /// <param name="conditionNodeId">The condition node identifier used when acknowledging the alarm.</param>
+    public AlarmEventViewModel(
+        string sourceName,
+        string conditionName,
+        ushort severity,
+        string message,
+        bool retain,
+        bool activeState,
+        bool ackedState,
+        DateTime time,
+        byte[]? eventId = null,
+        string? conditionNodeId = null)
+    {
+        SourceName = sourceName;
+        ConditionName = conditionName;
+        Severity = severity;
+        Message = message;
+        Retain = retain;
+        ActiveState = activeState;
+        AckedState = ackedState;
+        Time = time;
+        EventId = eventId;
+        ConditionNodeId = conditionNodeId;
+    }
+
+    /// <summary>
+    /// Gets the source object or variable name associated with the alarm.
+    /// </summary>
+    public string SourceName { get; }
+
+    /// <summary>
+    /// Gets the OPC UA condition name reported for the alarm event.
+    /// </summary>
+    public string ConditionName { get; }
+
+    /// <summary>
+    /// Gets the severity value shown to the operator.
+    /// </summary>
+    public ushort Severity { get; }
+
+    /// <summary>
+    /// Gets the alarm message text shown in the UI.
+    /// </summary>
+    public string Message { get; }
+
+    /// <summary>
+    /// Gets a value indicating whether the server is retaining the condition.
+    /// </summary>
+    public bool Retain { get; }
+
+    /// <summary>
+    /// Gets a value indicating whether the alarm is currently active.
+    /// </summary>
+    public bool ActiveState { get; }
+
+    /// <summary>
+    /// Gets a value indicating whether the alarm has already been acknowledged.
+    /// </summary>
+    public bool AckedState { get; }
+
+    /// <summary>
+    /// Gets the event timestamp displayed for the alarm row.
+    /// </summary>
+    public DateTime Time { get; }
+
+    /// <summary>
+    /// Gets the OPC UA event identifier needed to acknowledge the alarm.
+    /// </summary>
+    public byte[]? EventId { get; }
+
+    /// <summary>
+    /// Gets the condition node identifier used for acknowledgment method calls.
+    /// </summary>
+    public string? ConditionNodeId { get; }
+
+    /// <summary>Whether this alarm can be acknowledged (active, not yet acked, has EventId).</summary>
+    public bool CanAcknowledge => ActiveState && !AckedState && EventId != null && ConditionNodeId != null;
+}