refactor(uns): drop dead LoadEquipmentChildrenAsync + LinesForCluster; fix stale comment

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

@@ -103,8 +103,8 @@ public sealed record EquipmentImportResult(int Inserted, int Skipped, IReadOnlyL
 /// <summary>
 /// Loads the structural portion of the unified-namespace (UNS) browse tree —
 /// Enterprise → Cluster → Area → Line → Equipment — from the config database.
-/// Equipment children (tags/virtual tags) are summarised by count only and loaded
-/// lazily by the renderer via <see cref="LoadEquipmentChildrenAsync"/>.
+/// Equipment is a leaf in the tree; its tags and virtual tags are accessed via the
+/// equipment detail page, not via lazy tree expansion.
 /// </summary>
 public interface IUnsTreeService
 {
@@ -117,16 +117,6 @@ public interface IUnsTreeService
     /// <returns>The enterprise root nodes, each populated down to equipment.</returns>
     Task<IReadOnlyList<UnsNode>> LoadStructureAsync(CancellationToken ct = default);
 
-    /// <summary>
-    /// Lazily loads the Tag and VirtualTag leaf nodes for a single equipment node.
-    /// Tags are returned first (ordered by Name), followed by VirtualTags (ordered by Name).
-    /// Leaf nodes carry <c>ChildCount = 0</c> and <c>HasLazyChildren = false</c>.
-    /// </summary>
-    /// <param name="equipmentId">The equipment whose children to load.</param>
-    /// <param name="ct">A token to cancel the load.</param>
-    /// <returns>Tag nodes followed by VirtualTag nodes; empty if the equipment has none.</returns>
-    Task<IReadOnlyList<UnsNode>> LoadEquipmentChildrenAsync(string equipmentId, CancellationToken ct = default);
-
     /// <summary>
     /// Loads the driver tags bound to a single equipment as flat row projections for the equipment
     /// page's Tags tab table, ordered by Name. Each row carries the display columns plus the

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

@@ -82,51 +82,6 @@ public sealed class UnsTreeService(IDbContextFactory<OtOpcUaConfigDbContext> dbF
         return UnsTreeAssembly.Build(clusters, areas, lines, equipment);
     }
 
-    /// <inheritdoc />
-    public async Task<IReadOnlyList<UnsNode>> LoadEquipmentChildrenAsync(
-        string equipmentId,
-        CancellationToken ct = default)
-    {
-        await using var db = await dbFactory.CreateDbContextAsync(ct);
-
-        var tagNodes = await db.Tags
-            .AsNoTracking()
-            .Where(t => t.EquipmentId == equipmentId)
-            .OrderBy(t => t.Name)
-            .Select(t => new UnsNode
-            {
-                Kind = UnsNodeKind.Tag,
-                Key = $"tag:{t.TagId}",
-                DisplayName = $"{t.Name} ({t.DataType})",
-                EntityId = t.TagId,
-                ClusterId = null,
-                ChildCount = 0,
-                HasLazyChildren = false,
-            })
-            .ToListAsync(ct);
-
-        var vtagNodes = await db.VirtualTags
-            .AsNoTracking()
-            .Where(v => v.EquipmentId == equipmentId)
-            .OrderBy(v => v.Name)
-            .Select(v => new UnsNode
-            {
-                Kind = UnsNodeKind.VirtualTag,
-                Key = $"vtag:{v.VirtualTagId}",
-                DisplayName = $"{v.Name} (VirtualTag)",
-                EntityId = v.VirtualTagId,
-                ClusterId = null,
-                ChildCount = 0,
-                HasLazyChildren = false,
-            })
-            .ToListAsync(ct);
-
-        var result = new List<UnsNode>(tagNodes.Count + vtagNodes.Count);
-        result.AddRange(tagNodes);
-        result.AddRange(vtagNodes);
-        return result;
-    }
-
     /// <inheritdoc />
     public async Task<IReadOnlyList<EquipmentTagRow>> LoadTagsForEquipmentAsync(string equipmentId, CancellationToken ct = default)
     {