feat(adminui): wire OpcUaClient picker to live browser

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/OpcUaClientDriverPage.razor

@@ -58,7 +58,8 @@ else
                              CurrentAddress="@_pickedAddress"
                              OnPickAddress="@OnAddressPicked">
                 <OpcUaClientAddressPickerBody CurrentAddress="@_pickedAddress"
-                                              CurrentAddressChanged="@((s) => _pickedAddress = s)" />
+                                              CurrentAddressChanged="@((s) => _pickedAddress = s)"
+                                              GetConfigJson="@SerializeCurrentConfig" />
             </DriverTagPicker>
 
             @* Endpoint *@

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Drivers/Pickers/OpcUaClientAddressPickerBody.razor

@@ -1,22 +1,57 @@
-@* Static OPC UA Client address builder: NodeId free text → verbatim.
-   Live browse deferred to a follow-up phase. *@
-
-<div class="alert alert-info py-2 px-3 mb-3 small">
-    <strong>Note:</strong> Live OPC UA node browse is deferred to a follow-up phase.
-    Enter the NodeId string manually below.
-</div>
+@* OPC UA Client address picker:
+     1. Manual NodeId entry (always available)
+     2. (DriverOperator-gated) Browse remote server with live tree, lazy expand. *@
+@implements IAsyncDisposable
+@using Microsoft.AspNetCore.Authorization
+@using ZB.MOM.WW.OtOpcUa.AdminUI.Browsing
+@using ZB.MOM.WW.OtOpcUa.Commons.Browsing
+@inject IBrowserSessionService BrowserService
+@inject AuthenticationStateProvider AuthState
+@inject IAuthorizationService AuthorizationService
 
 <div class="row g-3">
     <div class="col-md-10">
         <label class="form-label">NodeId</label>
-        <input type="text" class="form-control form-control-sm mono" placeholder="ns=2;s=Channel.Device.Tag"
+        <input type="text" class="form-control form-control-sm mono"
+               placeholder="ns=2;s=Channel.Device.Tag"
                @bind="_nodeId" @bind:after="OnChangedAsync" />
         <div class="form-text">
-            OPC UA NodeId string, e.g. <code>ns=2;s=Channel.Device.Tag</code> or <code>i=1001</code>.
+            OPC UA NodeId string, e.g. <code>ns=2;s=Channel.Device.Tag</code> or
+            <code>i=1001</code>. Use Browse to navigate the remote server.
         </div>
     </div>
 </div>
 
+@if (_canOperate)
+{
+    <div class="mt-3 d-flex align-items-center gap-2">
+        @if (_token == Guid.Empty)
+        {
+            <button type="button" class="btn btn-outline-primary btn-sm"
+                    disabled="@_opening" @onclick="OpenBrowseAsync">
+                @if (_opening) { <span class="spinner-border spinner-border-sm me-1"></span> }
+                Browse remote server
+            </button>
+        }
+        else
+        {
+            <span class="chip chip-ok">Browser open</span>
+            <button type="button" class="btn btn-outline-secondary btn-sm" @onclick="CloseBrowseAsync">
+                Close
+            </button>
+        }
+        @if (_openError is not null) { <span class="chip chip-bad" title="@_openError">@TruncatedError()</span> }
+    </div>
+
+    @if (_token != Guid.Empty)
+    {
+        <div class="mt-2">
+            <DriverBrowseTree SessionToken="_token" OnNodeSelected="OnTreeSelectAsync"
+                              SelectedNodeId="_nodeId" />
+        </div>
+    }
+}
+
 <div class="mt-3">
     <span class="text-muted small">Result:</span>
     <code class="mono ms-2">@_built</code>
@@ -25,14 +60,47 @@
 @code {
     [Parameter] public string CurrentAddress { get; set; } = "";
     [Parameter] public EventCallback<string> CurrentAddressChanged { get; set; }
+    [Parameter, EditorRequired] public Func<string> GetConfigJson { get; set; } = () => "{}";
 
     private string _nodeId = "";
     private string _built = "";
+    private Guid _token = Guid.Empty;
+    private bool _opening;
+    private bool _canOperate;
+    private string? _openError;
 
-    protected override void OnInitialized()
+    protected override async Task OnInitializedAsync()
     {
+        var auth = await AuthState.GetAuthenticationStateAsync();
+        var authResult = await AuthorizationService.AuthorizeAsync(auth.User, null, "DriverOperator");
+        _canOperate = authResult.Succeeded;
         _built = _nodeId;
-        _ = CurrentAddressChanged.InvokeAsync(_built);
+        await CurrentAddressChanged.InvokeAsync(_built);
+    }
+
+    private async Task OpenBrowseAsync()
+    {
+        _opening = true; _openError = null; StateHasChanged();
+        try
+        {
+            var json = GetConfigJson() ?? "{}";
+            var result = await BrowserService.OpenAsync("OpcUaClient", json, default);
+            if (result.Ok) _token = result.Token;
+            else _openError = result.Message;
+        }
+        finally { _opening = false; StateHasChanged(); }
+    }
+
+    private async Task CloseBrowseAsync()
+    {
+        var t = _token; _token = Guid.Empty; StateHasChanged();
+        if (t != Guid.Empty) await BrowserService.CloseAsync(t);
+    }
+
+    private async Task OnTreeSelectAsync(BrowseNode node)
+    {
+        _nodeId = node.NodeId;
+        await OnChangedAsync();
     }
 
     private async Task OnChangedAsync()
@@ -40,4 +108,15 @@
         _built = _nodeId;
         await CurrentAddressChanged.InvokeAsync(_built);
     }
+
+    private string TruncatedError() =>
+        _openError is null ? "" : (_openError.Length > 60 ? _openError[..60] + "…" : _openError);
+
+    public async ValueTask DisposeAsync()
+    {
+        if (_token != Guid.Empty)
+        {
+            try { await BrowserService.CloseAsync(_token); } catch { /* circuit teardown */ }
+        }
+    }
 }