T08b menus: menu bar over the native menus, searchable menu, pie menu; megamenu points to the navigation menu; menus follow their hosts

tasks/ch01-10.md

@@ -117,7 +117,7 @@
 - [x] TrafficLights → `shell::WindowControls`
 - [x] WindowDragRegion — `shell::drag_region`: native drag area, Linux move, double-click zoom
 - [x] WindowResizeBorder — `shell::ResizeBorder`: client decorations only; macOS and Windows resize natively
-- [x] MenuBar → `menus::MenuBar` (T08): the NativeMenu definitions, drawn in the window
+- [x] MenuBar → `menus::MenuBar` (T08b): the NativeMenu definitions, drawn in the window
 - [x] NativeMenu — native `cx.set_menus()`
 - [x] Toolbar / ToolbarGroup / ToolbarSeparator
 - [x] StatusBar / StatusBarItem
@@ -321,10 +321,10 @@
 
 ## T08b Menus · Bar, search & pie
 
-- [ ] MenuBar Menu — `menus::MenuBar`, also T04 MenuBar: the native menus, drawn in the window
-- [ ] MegaMenu
-- [ ] SearchableMenu
-- [ ] PieMenu / RadialMenu
+- [x] MenuBar Menu → `menus::MenuBar`; also T04 MenuBar: the native menus, drawn in the window
+- [x] MegaMenu → `navigation::NavigationMenu`: each entry opens a panel of links with a line of detail
+- [x] SearchableMenu → `menus::SearchableMenu`
+- [x] PieMenu / RadialMenu → `menus::PieMenu`, `menus::PieItem`
 
 ## T09 Overlays — `src/overlays`