[joshooaj]

Summary

Two changes to the Management Client surface and one regression fix:

1. MC UI → hosted WPF. The WinForms item-configuration page and the "Web Content Workspaces" overview page are now WPF pages hosted in an ElementHost (Dock=Fill), with plugin-owned styles — the Management Client supplies no WPF theme resources.
2. Hide address regression. AddressVisibility was a getter-only binding evaluated during InitializeComponent() before the ViewItemManager was attached, so it returned Visible and only property-change events (ReloadProperties) ever re-raised it. The manager setter now raises the notification when it attaches.

 WebContentUserControl (WinForms wrapper)
-  Designer.cs: label/textbox/checkbox grid (WinForms)
+  ElementHost (Dock=Fill)
+    WorkspaceConfigPage.xaml (WPF; same public surface, Strings shared with SC)
 WorkspaceItemManager
-  GenerateOverviewUserControl => WinForms overview
+  GenerateOverviewUserControl => WorkspaceOverviewUserControl (ElementHost + WPF help page)

 WebContentViewModel
  AddressVisibility => settings.HideAddress ? Collapsed : Visible
  ViewItemManager setter
+    if (value != null) OnPropertyChanged(nameof(AddressVisibility))  # binding was stale until first property change

Evidence

• Before: user-reported — "Hide address" checked in Demo Workspace, yet the Smart Client still showed the address textbox; only "Hide toolbar" worked.
• After (live Smart Client, Demo Workspace with toolbar visible + hide address): address bar gone, NavHome/NavBack/NavReload remain — UIA contract test asserts addressBar == null, buttons present.

— live Smart Client with toolbar visible + hide address: address bar gone, NavHome/NavBack/NavReload remain (from artifacts/ux/20261030-083507).

• dotnet test src/WebContent.Tests — 217/217 passed.
• dotnet test tests/ux --filter SmartClientWorkspaceTests — 2/2 passed (hide-address contract branch: address bar absent, home reachable via NavHome + CDP).
• ToolbarOptionsTests.HideAddress_WithVisibleToolbar_RemovesAddressBar drives the MC checkboxes (chkHideToolbar off, chkHideAddress on) via the new WPF page and verifies the resulting SC toolbar shape.

Merge Danger

Door: two-way — pure UI + binding-notification change; the deleted WinForms Designer.cs/resx return on revert.

Blast Radius: Management Client plugin pages (config + overview) and the Smart Client address bar only. No server-side or protocol changes; property dictionary shape is unchanged.