feat(adminui): create-new-script from the inline virtual-tag panel

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

@@ -418,6 +418,19 @@ public interface IUnsTreeService
     /// <returns>The scripts projected to <c>(ScriptId, Display)</c> pairs.</returns>
     Task<IReadOnlyList<(string ScriptId, string Display)>> LoadScriptsAsync(CancellationToken ct = default);
 
+    /// <summary>
+    /// Creates a new, empty C# script row so the inline virtual-tag panel can bind a brand-new script
+    /// without leaving the modal. The <c>ScriptId</c> is system-generated (<c>SC-</c> + the first 12 hex
+    /// chars of a fresh <see cref="Guid"/>, mirroring the Script-edit page's convention); the source is
+    /// blank, the <c>SourceHash</c> is the SHA-256 of that blank source (so it stays consistent with the
+    /// inline save), and the language is <c>CSharp</c>. A whitespace-only name falls back to a default.
+    /// The new id is returned via <see cref="UnsMutationResult.CreatedId"/> so the caller can bind it.
+    /// </summary>
+    /// <param name="name">The operator-friendly script name; whitespace falls back to a default.</param>
+    /// <param name="ct">A token to cancel the operation.</param>
+    /// <returns>Success carrying the generated <c>SC-…</c> id in <see cref="UnsMutationResult.CreatedId"/>.</returns>
+    Task<UnsMutationResult> CreateScriptAsync(string name, CancellationToken ct = default);
+
     /// <summary>
     /// Creates a new equipment-bound virtual tag (plan decision #2 — virtual tags are always scoped
     /// to an equipment). Fails if the equipment does not exist, if no script is chosen, if neither a