feat(centralui): Create saves bindings (upsert) and lands on Configure with a created/bound/bindError notice

Claude-Session: https://claude.ai/code/session_01G2GHPnbbKGvyyfbr2XBRVH

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Deployment/InstanceConfigure.razor

@@ -81,6 +81,28 @@
             </div>
         </div>
 
+        @* One-shot notice for an instance that just arrived from the Create page
+           (design 2026-08-21). Query-string only — nothing is persisted, so it
+           disappears on any later visit. *@
+        @if (Created == 1)
+        {
+            <div class="alert @(BindError is null ? "alert-success" : "alert-warning") py-2 small" data-test="configure-created-notice">
+                Instance created.
+                @if (BindError is not null)
+                {
+                    <text>Bindings were NOT saved: @BindError — bind the groups below.</text>
+                }
+                else if (Bound is > 0)
+                {
+                    <text>@Bound binding(s) saved. Test Bindings, then Deploy.</text>
+                }
+                else
+                {
+                    <text>Bind the groups below, then Deploy.</text>
+                }
+            </div>
+        }
+
         @* Connection Bindings — grouped by module (design 2026-08-20). Rows come
            from the flattened configuration so composed module members appear;
            each group header carries a connection + Object apply that rewrites
@@ -710,6 +732,13 @@
 @code {
     [Parameter] public int Id { get; set; }
 
+    // Set by the Create Instance page's post-create redirect (design 2026-08-21):
+    // Created=1 always, then either the count of bindings saved or the error that
+    // stopped them being saved. Read-only display — never persisted.
+    [SupplyParameterFromQuery] public int? Created { get; set; }
+    [SupplyParameterFromQuery] public int? Bound { get; set; }
+    [SupplyParameterFromQuery] public string? BindError { get; set; }
+
     private Instance? _instance;
     private string _templateName = "";
     private string _siteName = "";

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Deployment/InstanceCreate.razor

@@ -293,26 +293,60 @@
             return;
         }
 
+        string user;
+        int id;
         try
         {
-            var user = await GetCurrentUserAsync();
+            user = await GetCurrentUserAsync();
             var result = await InstanceService.CreateInstanceAsync(
                 _createName.Trim(), _createTemplateId, _createSiteId, _createAreaId == 0 ? null : _createAreaId, user);
-            if (result.IsSuccess)
+            if (result.IsFailure)
-            {
-                NavigationManager.NavigateTo("/deployment/topology");
-            }
-            else
             {
                 _formError = result.Error;
+                return;
             }
+            id = result.Value.Id;
         }
         catch (Exception ex)
         {
             _formError = $"Create failed: {ex.Message}";
+            return;
         }
+
+        // From here the instance EXISTS. Whatever the binding save does, land on
+        // Configure rather than leaving the operator on a stale create form —
+        // carrying any binding error in the query so it is visible there.
+        var bindings = _skipBindings || _previewError is not null
+            ? (IReadOnlyList<ConnectionBinding>)Array.Empty<ConnectionBinding>()
+            : CreateBindingPlanner.BuildBindings(_groups, _inputs);
+
+        if (bindings.Count == 0)
+        {
+            NavigationManager.NavigateTo($"/deployment/instances/{id}/configure?created=1");
+            return;
+        }
+
+        string? bindError = null;
+        try
+        {
+            var bind = await InstanceService.SetConnectionBindingsAsync(id, bindings, user);
+            if (bind.IsFailure) bindError = bind.Error;
+        }
+        catch (Exception ex)
+        {
+            // Network / actor timeout AFTER the instance was created.
+            bindError = ex.Message;
+        }
+
+        var query = bindError is null
+            ? $"created=1&bound={bindings.Count}"
+            : $"created=1&bindError={Uri.EscapeDataString(Truncate(bindError, 300))}";
+        NavigationManager.NavigateTo($"/deployment/instances/{id}/configure?{query}");
     }
 
+    /// <summary>Keeps a failure message short enough to ride in the query string.</summary>
+    private static string Truncate(string s, int n) => s.Length <= n ? s : s[..n] + "…";
+
     private void GoBack() => NavigationManager.NavigateTo("/deployment/topology");
 
     // CentralUI-024: delegates to the shared helper so the claim type stays