feat(adminui): B2-WP6 browse re-target — /raw device browse commits raw tags

Browse device… on a /raw Device/TagGroup opens the discovery-browser modal
against the merged Driver+Device config and commits selected browse leaves as
raw Tag rows under the target, via IRawTreeService.ImportTagsAsync.

- RawBrowseModal.razor: two-tier browse gate (bespoke IDriverBrowser →
  universal DiscoveryDriverBrowser via SupportsOnlineDiscovery → disabled),
  merged config from LoadMergedProbeConfigAsync, multi-select over
  DriverBrowseTree, opt-in 'create matching tag-groups' folder mirror,
  commit via ImportTagsAsync.
- RawBrowseCommitMapper: pure leaf→RawTagImportRow mapper — DriverDataType→
  OPC UA type, per-driver address field (nodeId/tagPath/symbolPath/address/
  attributeRef), target-group + mirror path combine. Unit-tested (39 tests).
- DriverBrowseTree: additive multi-select mode (checkboxes + ancestor-path
  callback), default off preserves single-select pickers.
- RawTree: OnBrowseDevice wired to the modal (Device + TagGroup menus).

Claude-Session: https://claude.ai/code/session_01LVneM3eh1UtJxEisFXgmox

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

@@ -20,7 +20,7 @@
     }
     else
     {
-        @foreach (var n in _roots) { @RenderNode(n, 0) }
+        @foreach (var n in _roots) { @RenderNode(n, 0, System.Array.Empty<string>()) }
     }
 </div>
 
@@ -34,6 +34,19 @@
     /// <summary>Fired when the user clicks a leaf (or any node — caller decides what to do with it).</summary>
     [Parameter] public EventCallback<BrowseNode> OnNodeSelected { get; set; }
 
+    /// <summary>When true, leaves render a selection checkbox and clicking a leaf toggles it (WP6 "Browse
+    /// device…" multi-select) instead of single-selecting. Folders still expand/navigate as usual. Default
+    /// false preserves the single-select address-picker behavior.</summary>
+    [Parameter] public bool MultiSelect { get; set; }
+
+    /// <summary>In multi-select mode, the set of currently-selected leaf NodeIds (drives checkbox state +
+    /// row highlight). Owned by the parent; the tree only reads it.</summary>
+    [Parameter] public IReadOnlyCollection<string>? SelectedLeafIds { get; set; }
+
+    /// <summary>In multi-select mode, fired when a leaf's checkbox is toggled — carries the leaf plus its
+    /// captured ancestor-folder display-name path (root→parent) for optional TagGroup mirroring.</summary>
+    [Parameter] public EventCallback<ZB.MOM.WW.OtOpcUa.AdminUI.Browsing.BrowseLeafSelection> OnLeafToggled { get; set; }
+
     private bool _loading = true;
     private string? _error;
     private List<TreeItem>? _roots;
@@ -86,10 +99,28 @@
         await OnNodeSelected.InvokeAsync(item.Node);
     }
 
-    private RenderFragment RenderNode(TreeItem item, int depth) => __builder =>
+    private async Task ToggleLeafAsync(TreeItem item, IReadOnlyList<string> ancestorPath)
+    {
+        await OnLeafToggled.InvokeAsync(
+            new ZB.MOM.WW.OtOpcUa.AdminUI.Browsing.BrowseLeafSelection(item.Node, ancestorPath));
+    }
+
+    private bool IsLeafSelected(string nodeId) => SelectedLeafIds?.Contains(nodeId) == true;
+
+    private static IReadOnlyList<string> Append(IReadOnlyList<string> path, string segment)
+    {
+        var list = new List<string>(path.Count + 1);
+        list.AddRange(path);
+        list.Add(segment);
+        return list;
+    }
+
+    private RenderFragment RenderNode(TreeItem item, int depth, IReadOnlyList<string> ancestorPath) => __builder =>
     {
         var indent = $"padding-left:{depth * 18}px";
-        var selectedCls = _selectedNodeIdLocal == item.Node.NodeId ? "bg-primary-subtle" : "";
+        var isMultiLeaf = MultiSelect && item.Node.Kind == BrowseNodeKind.Leaf;
+        var selectedCls = (isMultiLeaf ? IsLeafSelected(item.Node.NodeId) : _selectedNodeIdLocal == item.Node.NodeId)
+            ? "bg-primary-subtle" : "";
         <div class="d-flex align-items-center gap-1 py-1 @selectedCls" style="@indent">
             @if (item.Node.Kind == BrowseNodeKind.Folder && item.Node.HasChildrenHint)
             {
@@ -102,8 +133,18 @@
             {
                 <span style="width:18px"></span>
             }
-            <a href="#" @onclick="@(() => SelectAsync(item))" @onclick:preventDefault
-               class="text-decoration-none mono small">@item.Node.DisplayName</a>
+            @if (isMultiLeaf)
+            {
+                <input type="checkbox" class="form-check-input" checked="@IsLeafSelected(item.Node.NodeId)"
+                       @onchange="@(() => ToggleLeafAsync(item, ancestorPath))" />
+                <a href="#" @onclick="@(() => ToggleLeafAsync(item, ancestorPath))" @onclick:preventDefault
+                   class="text-decoration-none mono small">@item.Node.DisplayName</a>
+            }
+            else
+            {
+                <a href="#" @onclick="@(() => SelectAsync(item))" @onclick:preventDefault
+                   class="text-decoration-none mono small">@item.Node.DisplayName</a>
+            }
             @if (item.Node.Kind == BrowseNodeKind.Leaf)
             {
                 <span class="chip chip-idle ms-1" style="font-size:0.7rem">leaf</span>
@@ -129,7 +170,7 @@
                    @bind="item.Filter" @bind:event="oninput" />
             @foreach (var c in FilterChildren(item))
             {
-                @RenderNode(c, depth + 1)
+                @RenderNode(c, depth + 1, Append(ancestorPath, item.Node.DisplayName))
             }
         }
     };