feat(m9/T32c): schema-library CRUD commands + handlers + Central UI page + read-accessor

src/ZB.MOM.WW.ScadaBridge.CentralUI/ServiceCollectionExtensions.cs

@@ -124,6 +124,23 @@ public static class ServiceCollectionExtensions
         // the move dialog only SUBMITS the command and renders the returned outcome.
         services.AddScoped<IDataConnectionMoveService, DataConnectionMoveService>();
 
+        // Schema Library (M9-T32c): authoring + read accessors for the reusable named
+        // JSON-Schema library (SharedSchema + ISharedSchemaRepository, T32a).
+        //
+        // ISchemaLibraryService dispatches the CRUD commands to the central
+        // ManagementActor through the in-process ManagementActorHolder seam — the same
+        // Ask path the HTTP /management endpoint uses — so the server stays the single
+        // enforcer of the Designer gate, the unique-name guard, and JSON-Schema
+        // validation; the page only SUBMITS commands.
+        services.AddScoped<ISchemaLibraryService, SchemaLibraryService>();
+
+        // ISchemaLibraryQueryService is the READ counterpart that T30's schema-driven
+        // value-entry forms reuse to resolve {"$ref":"lib:Name"} pointers — a name →
+        // schema-JSON map backed by ISharedSchemaRepository over a fresh DI scope per
+        // query (mirroring the AuditLog / KPI query services, off the circuit-scoped
+        // DbContext). Read-only; no mutation goes through it.
+        services.AddScoped<ISchemaLibraryQueryService, SchemaLibraryQueryService>();
+
         // Roslyn-backed C# analysis for the Monaco script editor.
         // Scoped because SharedScriptCatalog wraps a scoped service.
         services.AddMemoryCache(o => o.SizeLimit = 200);