Right-click on browse tree nodes to Subscribe (multi-select) or View History
(Variable nodes only), with automatic tab switching. Add missing UI controls
for failover URLs, session timeout, auto-accept certificates, and certificate
store path. Fix tree expansion by adding two-way IsExpanded binding on
TreeViewItem.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Implements Client.Shared (IOpcUaClientService with connection lifecycle, failover,
browse, read/write, subscriptions, alarms, history, redundancy), Client.CLI (8 CliFx
commands mirroring tools/opcuacli-dotnet), and Client.UI (Avalonia desktop app with
tree browser, read/write, subscriptions, alarms, and history tabs). All three target
.NET 10 and are covered by 249 unit tests.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
