feat(adminui): ScriptEdit uses MonacoEditor; drop CDN loader

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/ScriptEdit.razor

@@ -13,7 +13,6 @@
 @using ZB.MOM.WW.OtOpcUa.Configuration.Entities
 @inject IDbContextFactory<OtOpcUaConfigDbContext> DbFactory
 @inject NavigationManager Nav
-@inject IJSRuntime JS
 
 <div class="d-flex justify-content-between align-items-center mb-3">
     <h4 class="mb-0">@(IsNew ? "New script" : "Edit script")</h4>
@@ -57,15 +56,8 @@ else
         <section class="panel rise mt-3">
             <div class="panel-head">Source</div>
             <div style="padding:1rem">
-                @* The textarea stays in the DOM and remains Blazor's source of truth. Monaco
-                   mounts a <div> beside it (textarea hides), and the loader's onDidChangeModelContent
-                   handler mirrors edits back into the textarea + fires the input event so @bind
-                   picks them up. Falls back to the textarea gracefully if Monaco's CDN is
-                   unreachable (air-gapped deployments — see monaco-loader.js). *@
-                <InputTextArea id="script-source" @bind-Value="_form.SourceCode"
-                               class="form-control form-control-sm mono" rows="20"
-                               placeholder="// C# expression body" />
-                <div class="form-text">SHA-256 hash is computed automatically on save. Monaco editor attaches over the textarea on render.</div>
+                    <MonacoEditor @bind-Value="_form.SourceCode" Height="420px" />
+                <div class="form-text">SHA-256 hash is computed automatically on save.</div>
             </div>
         </section>
 
@@ -110,24 +102,6 @@ else
         _loaded = true;
     }
 
-    protected override async Task OnAfterRenderAsync(bool firstRender)
-    {
-        if (!firstRender || !_loaded) return;
-        // Inject loader once, then attach over the textarea. Failures are silent — the page
-        // is fully usable via the underlying textarea if Monaco's CDN is unreachable.
-        try
-        {
-            await JS.InvokeVoidAsync("eval", "if (!document.querySelector('script[data-otopcua=monaco-loader]')) { var s=document.createElement('script'); s.src='/_content/ZB.MOM.WW.OtOpcUa.AdminUI/js/monaco-loader.js'; s.dataset.otopcua='monaco-loader'; document.head.appendChild(s); }");
-            // Wait a tick for the loader IIFE to register window.otOpcUaScriptEditor, then attach.
-            await Task.Delay(50);
-            await JS.InvokeVoidAsync("otOpcUaScriptEditor.attach", "script-source");
-        }
-        catch
-        {
-            // Textarea remains the editor — no-op.
-        }
-    }
-
     private async Task SubmitAsync()
     {
         _busy = true; _error = null;