feat(v3-batch3): B3-WP4 — {{equip}}/<RefName> reference-relative resolution

Replace the deleted equipment-base-prefix {{equip}} mechanism (impossible now
that equipment is reference-only) with per-reference resolution:
{{equip}}/<RefName> resolves through the owning equipment's UnsTagReference rows
(by effective name) to the backing raw tag's RawPath. Every unresolved <RefName>
is a clear deploy error + authoring rejection + Monaco diagnostic — preserving
"editor accepts <=> publish accepts".

Commons:
- EquipmentScriptPaths: delete DeriveEquipmentBase; SubstituteEquipmentToken now
  takes the equipment's reference map (effectiveName -> RawPath) and substitutes
  {{equip}}/<RefName> inside path literals (unresolved left intact, never throws);
  add ExtractEquipReferenceNames (path-literal scoped) +
  ExtractEquipReferenceNamesFromText (message templates). Slash syntax replaces
  the v2 dot joint.
- New EquipmentReferenceMap: shared, input-shape-agnostic builder (entity + JSON
  sides) over RawPathResolver — the single authority both compose seams + the
  validator use, so resolved RawPaths agree byte-for-byte.

Compose seams (byte-parity kept):
- AddressSpaceComposer.Compose + DeploymentArtifact.ParseComposition both build
  the per-equipment reference map from UnsTagReferences + Tags + raw topology and
  substitute VirtualTag AND ScriptedAlarm-predicate sources before dependency
  extraction (runtime dep refs = resolved RawPaths).

Deploy gate + authoring + editor:
- DraftValidator.ValidateEquipReferenceResolution: EquipReferenceUnresolved error
  for unresolved {{equip}}/<RefName> in VirtualTag/ScriptedAlarm scripts + alarm
  message-template tokens (naming script, equipment, missing ref).
- UnsTreeService.ValidateEquipTokenAsync (Wave-A M1): reference-relative authoring
  rejection, replacing the stale DeriveEquipmentBase(empty)->reject-all logic.
- ScriptAnalysisService: {{equip}}/ completion offers the equipment's reference
  effective names; DiagnoseAsync flags unresolved refs (OTSCRIPT_EQUIPREF) same as
  the deploy gate. Requests carry optional EquipmentId (threaded MonacoEditor ->
  monaco-init.js -> fetch bodies). IScriptTagCatalog.GetEquipmentRelativeLeavesAsync
  repurposed to GetEquipmentReferenceNamesAsync(equipmentId, filter).

Tests: EquipmentScriptPaths substitution/extraction (slash pinned); composer<->
artifact reference-resolution byte-parity; DraftValidator unresolved-ref;
ScriptAnalysis completion+diagnostic; M1 authoring gate. Build clean (0/0); all
five affected suites green.

Claude-Session: https://claude.ai/code/session_01LVneM3eh1UtJxEisFXgmox

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ScriptAnalysis/IScriptTagCatalog.cs

@@ -23,13 +23,16 @@ public interface IScriptTagCatalog
     /// <returns>The resolved tag info, or <see langword="null"/> when <paramref name="path"/> is not a known configured path.</returns>
     Task<ScriptTagInfo?> GetTagInfoAsync(string path, CancellationToken ct);
 
-    /// <summary>Distinct attribute leaf names — the substring after the first dot of each
-    /// configured tag FullName — optionally prefix-filtered. Powers {{equip}}. completion,
-    /// which needs the per-equipment object prefix stripped.</summary>
-    /// <param name="filter">Case-insensitive StartsWith prefix over the leaf; null/empty = all (bounded).</param>
+    /// <summary>v3: the owning equipment's <c>UnsTagReference</c> effective names (its
+    /// <c>DisplayNameOverride</c> else the backing raw tag's <c>Name</c>) — the resolvable set for
+    /// <c>{{equip}}/&lt;RefName&gt;</c> completion + diagnostics, matching what the compose seams substitute
+    /// and the deploy gate enforces. Optionally prefix-filtered. Empty when the equipment id is blank or has
+    /// no references.</summary>
+    /// <param name="equipmentId">The equipment whose references to list; blank returns empty.</param>
+    /// <param name="filter">Case-insensitive StartsWith prefix over the reference name; null/empty = all (bounded).</param>
     /// <param name="ct">Cancellation token.</param>
-    /// <returns>Distinct leaf names.</returns>
-    Task<IReadOnlyList<string>> GetEquipmentRelativeLeavesAsync(string? filter, CancellationToken ct);
+    /// <returns>Distinct reference effective names.</returns>
+    Task<IReadOnlyList<string>> GetEquipmentReferenceNamesAsync(string equipmentId, string? filter, CancellationToken ct);
 }
 
 /// <summary>Resolved info for one configured tag/virtual-tag path (for hover).</summary>
@@ -114,17 +117,32 @@ public sealed class ScriptTagCatalog(IDbContextFactory<OtOpcUaConfigDbContext> d
     }
 
     /// <inheritdoc />
-    public async Task<IReadOnlyList<string>> GetEquipmentRelativeLeavesAsync(string? filter, CancellationToken ct)
+    public async Task<IReadOnlyList<string>> GetEquipmentReferenceNamesAsync(string equipmentId, string? filter, CancellationToken ct)
     {
-        var entries = await BuildEntriesAsync(ct);
-        var leaves = new HashSet<string>(StringComparer.Ordinal);
-        foreach (var e in entries)
+        if (string.IsNullOrEmpty(equipmentId)) return Array.Empty<string>();
+        await using var db = await dbFactory.CreateDbContextAsync(ct);
+
+        var refs = await db.UnsTagReferences.AsNoTracking()
+            .Where(r => r.EquipmentId == equipmentId)
+            .Select(r => new { r.TagId, r.DisplayNameOverride })
+            .ToListAsync(ct);
+        if (refs.Count == 0) return Array.Empty<string>();
+
+        var tagIds = refs.Select(r => r.TagId).Distinct().ToList();
+        var tagNameById = await db.Tags.AsNoTracking()
+            .Where(t => tagIds.Contains(t.TagId))
+            .Select(t => new { t.TagId, t.Name })
+            .ToDictionaryAsync(t => t.TagId, t => t.Name, ct);
+
+        // Effective name = DisplayNameOverride else the backing raw tag's Name (ordinal set).
+        var names = new HashSet<string>(StringComparer.Ordinal);
+        foreach (var r in refs)
         {
-            var dot = e.Path.IndexOf('.');
-            if (dot < 0 || dot + 1 >= e.Path.Length) continue;
-            leaves.Add(e.Path.Substring(dot + 1));
+            var eff = r.DisplayNameOverride ?? (tagNameById.TryGetValue(r.TagId, out var n) ? n : null);
+            if (!string.IsNullOrEmpty(eff)) names.Add(eff!);
         }
-        IEnumerable<string> q = leaves;
+
+        IEnumerable<string> q = names;
         if (!string.IsNullOrWhiteSpace(filter))
             q = q.Where(n => n.StartsWith(filter, StringComparison.OrdinalIgnoreCase));
         return q.OrderBy(n => n, StringComparer.OrdinalIgnoreCase).Take(MaxResults).ToList();

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ScriptAnalysis/ScriptAnalysisContracts.cs

@@ -1,15 +1,19 @@
 namespace ZB.MOM.WW.OtOpcUa.AdminUI.ScriptAnalysis;
 
-public record DiagnoseRequest(string Code);
+// EquipmentId (optional) carries the owning-equipment context the {{equip}}/<RefName> completion +
+// diagnostic need to resolve reference effective names. Null on the shared ScriptEdit page (no single
+// equipment) — the equip-ref features are then inert, matching the deploy gate (which only resolves per
+// owning equipment).
+public record DiagnoseRequest(string Code, string? EquipmentId = null);
 public record DiagnoseResponse(IReadOnlyList<DiagnosticMarker> Markers);
 public record DiagnosticMarker(int Severity, int StartLineNumber, int StartColumn,
     int EndLineNumber, int EndColumn, string Message, string Code);
 
-public record CompletionsRequest(string CodeText, int Line, int Column);
+public record CompletionsRequest(string CodeText, int Line, int Column, string? EquipmentId = null);
 public record CompletionsResponse(IReadOnlyList<CompletionItem> Items);
 public record CompletionItem(string Label, string InsertText, string Detail, string Kind, int InsertTextRules = 0);
 
-public record HoverRequest(string CodeText, int Line, int Column);
+public record HoverRequest(string CodeText, int Line, int Column, string? EquipmentId = null);
 public record HoverResponse(string? Markdown);
 
 public record SignatureHelpRequest(string CodeText, int Line, int Column);

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ScriptAnalysis/ScriptAnalysisEndpoints.cs

@@ -16,7 +16,7 @@ public static class ScriptAnalysisEndpoints
         // ConfigEditor policy (Administrator or Designer) — matches the Script page gate and the /deployments gate.
         var group = endpoints.MapGroup("/api/script-analysis")
             .RequireAuthorization(AdminUiPolicies.ConfigEditor);
-        group.MapPost("/diagnostics",    (DiagnoseRequest r, ScriptAnalysisService s) => Results.Ok(s.Diagnose(r)));
+        group.MapPost("/diagnostics",    async (DiagnoseRequest r, ScriptAnalysisService s) => Results.Ok(await s.DiagnoseAsync(r)));
         group.MapPost("/completions",    async (CompletionsRequest r, ScriptAnalysisService s) => Results.Ok(await s.CompleteAsync(r)));
         group.MapPost("/hover",          async (HoverRequest r, ScriptAnalysisService s) => Results.Ok(await s.Hover(r)));
         group.MapPost("/signature-help", (SignatureHelpRequest r, ScriptAnalysisService s) => Results.Ok(s.SignatureHelp(r)));

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ScriptAnalysis/ScriptAnalysisService.cs

@@ -130,6 +130,58 @@ public sealed class ScriptAnalysisService
         }
     }
 
+    // ctx.GetTag("…") / ctx.SetVirtualTag("…") first-arg literal — three-part capture, mirroring
+    // EquipmentScriptPaths.PathLiteralRegex so the editor's {{equip}}/<RefName> diagnostic is scoped to the
+    // SAME path literals the compose seams substitute (never a comment / logger string).
+    private static readonly System.Text.RegularExpressions.Regex EquipPathLiteralRegex =
+        new(@"(ctx\s*\.\s*(?:GetTag|SetVirtualTag)\s*\(\s*"")([^""]*)("")",
+            System.Text.RegularExpressions.RegexOptions.Compiled);
+
+    /// <summary>Diagnostics plus the v3 equipment-relative <c>{{equip}}/&lt;RefName&gt;</c> resolution check.
+    /// Runs the synchronous Roslyn/policy <see cref="Diagnose"/> then, when an equipment context + catalog
+    /// are present, appends a marker for each <c>{{equip}}/&lt;RefName&gt;</c> whose <c>&lt;RefName&gt;</c> is
+    /// not one of the equipment's reference effective names — flagging exactly what the deploy gate
+    /// (<c>DraftValidator.ValidateEquipReferenceResolution</c>) rejects, so the editor accepts ⇔ publish
+    /// accepts. Inert (base markers only) on the shared ScriptEdit page where <c>EquipmentId</c> is null.</summary>
+    /// <param name="req">The diagnose request (its <c>EquipmentId</c> carries the owning-equipment context).</param>
+    /// <returns>The base diagnostics plus any unresolved-reference markers.</returns>
+    public async Task<DiagnoseResponse> DiagnoseAsync(DiagnoseRequest req)
+    {
+        var baseResp = Diagnose(req);
+        if (_catalog is null || string.IsNullOrEmpty(req.EquipmentId) || string.IsNullOrEmpty(req.Code))
+            return baseResp;
+        try
+        {
+            var code = Normalize(req.Code);
+            if (!code.Contains(EquipmentScriptPaths.EquipTokenPrefix, StringComparison.Ordinal))
+                return baseResp;
+
+            var names = await _catalog.GetEquipmentReferenceNamesAsync(req.EquipmentId, null, CancellationToken.None);
+            var resolvable = new HashSet<string>(names, StringComparer.Ordinal);
+            var markers = new List<DiagnosticMarker>(baseResp.Markers);
+
+            foreach (System.Text.RegularExpressions.Match m in EquipPathLiteralRegex.Matches(code))
+            {
+                var content = m.Groups[2].Value;
+                if (!content.StartsWith(EquipmentScriptPaths.EquipTokenPrefix, StringComparison.Ordinal)) continue;
+                var refName = content.Substring(EquipmentScriptPaths.EquipTokenPrefix.Length);
+                if (refName.Length == 0 || resolvable.Contains(refName)) continue;
+                // Mark the whole literal content span (the {{equip}}/<RefName> path).
+                var span = new Microsoft.CodeAnalysis.Text.TextSpan(m.Groups[2].Index, content.Length);
+                markers.Add(ToUserMarker(code, span,
+                    $"'{EquipmentScriptPaths.EquipTokenPrefix}{refName}' does not resolve — this equipment has no " +
+                    $"reference named '{refName}'. Add a matching reference or correct the path.",
+                    "OTSCRIPT_EQUIPREF"));
+            }
+            return new DiagnoseResponse(markers.Distinct().ToList());
+        }
+        catch (Exception ex)
+        {
+            _logger?.LogWarning(ex, "Script equip-ref diagnostics failed; returning base markers.");
+            return baseResp;
+        }
+    }
+
     private static int Sev(DiagnosticSeverity s) => s switch
     {
         DiagnosticSeverity.Error => 8,
@@ -173,13 +225,17 @@ public sealed class ScriptAnalysisService
 
             if (_catalog != null && TryGetTagPathLiteral(token, out var pathPrefix, out _))
             {
-                const string equipDot = EquipmentScriptPaths.EquipToken + "."; // "{{equip}}."
-                if (pathPrefix.StartsWith(equipDot, StringComparison.Ordinal))
+                // v3: {{equip}}/<RefName> completes the owning equipment's UnsTagReference effective names
+                // (needs the equipment context — inert on the shared ScriptEdit page where EquipmentId is null).
+                const string equipPrefix = EquipmentScriptPaths.EquipTokenPrefix; // "{{equip}}/"
+                if (pathPrefix.StartsWith(equipPrefix, StringComparison.Ordinal))
                 {
-                    var leaves = await _catalog.GetEquipmentRelativeLeavesAsync(
-                        pathPrefix.Substring(equipDot.Length), CancellationToken.None);
-                    return new CompletionsResponse(leaves
-                        .Select(n => new CompletionItem(equipDot + n, equipDot + n, "tag path", "Field"))
+                    if (string.IsNullOrEmpty(req.EquipmentId))
+                        return new CompletionsResponse(Array.Empty<CompletionItem>());
+                    var names = await _catalog.GetEquipmentReferenceNamesAsync(
+                        req.EquipmentId, pathPrefix.Substring(equipPrefix.Length), CancellationToken.None);
+                    return new CompletionsResponse(names
+                        .Select(n => new CompletionItem(equipPrefix + n, equipPrefix + n, "tag path", "Field"))
                         .ToList());
                 }
 
@@ -281,7 +337,8 @@ public sealed class ScriptAnalysisService
                 {
                     return new HoverResponse(
                         $"**Equipment-relative path** `{Code(tagPath)}`\n\n" +
-                        "The {{equip}} token is replaced with the owning equipment's tag base when the VirtualTag is deployed.");
+                        "`{{equip}}/<RefName>` resolves through the owning equipment's tag reference " +
+                        "(by effective name) to the backing raw tag's path when the VirtualTag is deployed.");
                 }
 
                 var info = await _catalog.GetTagInfoAsync(tagPath, CancellationToken.None);