fix(adminui): alias update pins invariants + LoadAliasTagAsync + null-driver guard (review)

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/AliasTagEditDto.cs

@@ -0,0 +1,15 @@
+namespace ZB.MOM.WW.OtOpcUa.AdminUI.Uns;
+using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
+
+/// <summary>The editable state of a Galaxy alias tag, loaded for the alias edit modal.
+/// <paramref name="FullName"/> is parsed out of the tag's TagConfig {"FullName":…}.</summary>
+/// <param name="TagId">The tag's stable id (read-only on edit).</param>
+/// <param name="Name">The tag name.</param>
+/// <param name="DriverInstanceId">The bound Galaxy gateway driver id.</param>
+/// <param name="DataType">The OPC UA built-in type name.</param>
+/// <param name="AccessLevel">The tag-level access baseline.</param>
+/// <param name="FullName">The Galaxy object reference parsed from TagConfig; empty string when absent.</param>
+/// <param name="RowVersion">The optimistic-concurrency token last read.</param>
+public sealed record AliasTagEditDto(
+    string TagId, string Name, string DriverInstanceId, string DataType,
+    TagAccessLevel AccessLevel, string FullName, byte[] RowVersion);

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/IUnsTreeService.cs

@@ -175,6 +175,12 @@ public interface IUnsTreeService
     /// <returns>The tag's edit projection, or <c>null</c> when missing.</returns>
     Task<TagEditDto?> LoadTagAsync(string tagId, CancellationToken ct = default);
 
+    /// <summary>Load a Galaxy alias tag for editing (FullName parsed from TagConfig). Null if not found.</summary>
+    /// <param name="tagId">The alias tag to load.</param>
+    /// <param name="ct">A token to cancel the load.</param>
+    /// <returns>The alias tag's edit projection, or <c>null</c> when missing.</returns>
+    Task<AliasTagEditDto?> LoadAliasTagAsync(string tagId, CancellationToken ct = default);
+
     /// <summary>
     /// Loads a single equipment-bound virtual tag projected for editing, or <c>null</c> if it no longer
     /// exists. Reads untracked and captures the current concurrency token for last-write-wins saves.

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/UnsTreeService.cs

@@ -204,6 +204,16 @@ public sealed class UnsTreeService(IDbContextFactory<OtOpcUaConfigDbContext> dbF
             .FirstOrDefaultAsync(ct);
     }
 
+    /// <inheritdoc />
+    public async Task<AliasTagEditDto?> LoadAliasTagAsync(string tagId, CancellationToken ct = default)
+    {
+        await using var db = await dbFactory.CreateDbContextAsync(ct);
+        var t = await db.Tags.AsNoTracking().FirstOrDefaultAsync(x => x.TagId == tagId, ct);
+        if (t is null) return null;
+        return new AliasTagEditDto(t.TagId, t.Name, t.DriverInstanceId, t.DataType, t.AccessLevel,
+            ExtractTagConfigFullName(t.TagConfig) ?? string.Empty, t.RowVersion);
+    }
+
     /// <inheritdoc />
     public async Task<VirtualTagEditDto?> LoadVirtualTagAsync(string virtualTagId, CancellationToken ct = default)
     {
@@ -975,6 +985,8 @@ public sealed class UnsTreeService(IDbContextFactory<OtOpcUaConfigDbContext> dbF
         entity.DataType = input.DataType;
         entity.AccessLevel = input.AccessLevel;
         entity.FolderPath = null;
+        entity.WriteIdempotent = false;
+        entity.PollGroupId = null;
         entity.TagConfig = BuildAliasTagConfig(input.FullName);
 
         try
@@ -1397,6 +1409,9 @@ public sealed class UnsTreeService(IDbContextFactory<OtOpcUaConfigDbContext> dbF
         string? equipmentCluster,
         CancellationToken ct)
     {
+        if (string.IsNullOrWhiteSpace(driverInstanceId))
+            return new UnsMutationResult(false, "An alias must be bound to a Galaxy gateway.");
+
         var driver = await db.DriverInstances.FirstOrDefaultAsync(d => d.DriverInstanceId == driverInstanceId, ct);
         if (driver is null)
         {