feat(adminui): refresh the browse tree after a rebirth request (G2-F3)

RequestRebirthAsync now returns only once the requested births have arrived
and gone quiet, but the modal still told the operator to re-expand the tree in
a few seconds. ConfirmRebirthAsync re-keys the tree against the same session
(as the Refresh button does) when the session and modal are still current,
drops the now-stale armed scope, and keeps the outcome line.

Refs #745
Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Raw/RawBrowseModal.razor

@@ -683,13 +683,29 @@
         _rebirthOutcome = null;
         _rebirthError = null;
         StateHasChanged();
+        var token = _token;
+        var target = _rebirthTarget;
         try
         {
-            var published = await BrowserService.RequestRebirthAsync(_token, _rebirthTarget.Scope, default);
+            var published = await BrowserService.RequestRebirthAsync(token, target.Scope, default);
+            // The session's RequestRebirthAsync returns only once the births it asked for have arrived and
+            // gone quiet (bounded by the window), so the tree can be re-read now instead of telling the
+            // operator to re-expand it later (G2-F3). Skipped if the session or modal went away meanwhile.
+            var refreshed = token == _token && Visible && !_disposed;
+            if (refreshed)
+            {
+                // Re-key the tree against the SAME session (as the Refresh button does). The armed scope is
+                // dropped — its node may not be in the rebuilt tree — but the outcome line is kept.
+                _treeGeneration++;
+                _rebirthTarget = null;
+            }
+
             _rebirthOutcome =
-                $"Rebirth requested for {_rebirthTarget.Kind} — {published} command"
+                $"Rebirth requested for {target.Kind} — {published} command"
                 + (published == 1 ? "" : "s")
-                + " published. Re-expand the tree in a few seconds to see the republished metrics.";
+                + (refreshed
+                    ? " published. The tree was refreshed with the births that arrived; press Refresh if more appear later."
+                    : " published.");
             _rebirthConfirming = false;
         }
         catch (Exception ex)