[SimonCropp]

The Windows tray head drew its own NotifyIcon and built its menu itself: the fixed items kept, the tracked ones built on every open. The macOS and Linux heads hand a model to PlatformHeads' tray every tenth of a second, so the menu was shown by two implementations. This needs PlatformHeads 0.10.0 (SimonCropp/PlatformHeads#10) for LeftClickOpensMenu, NotifyIconTray.Handle and TrayNotificationKind.Warning, so all seven pins move to it. 0.10.0 also moves its reusable build-native workflow's macOS job from macos-14, which GitHub retires on November 2, to macos-15 (SimonCropp/PlatformHeads#11). So the next build-native run here builds the Swift libraries on macOS 15.

The change.

• The tray: the Windows head's tray is now NotifyIconTray<TrayIcon>, which makes the menu from the last model each time it opens.

• The turns: TrayTurns (new, in the core) is the turn every head takes. It applies a model of both halves, and does a click on the menus it was chosen from, which it also answers tips from. TrayLoop runs it for Linux and macOS. On Windows a System.Windows.Forms.Timer runs it on the message loop, where the icon's events are raised.

• MenuBuilder is now only how the menu looks, as NotifyIconOptions:

  • the glyphs and the icon pictures;
  • Theme: the menu's font and opening direction;
  • Style: the tips and the submenus' direction;
  • LeftClickOpensMenu.

  Extensions.Handle and the ShowContextMenu accessor are gone, since PlatformHeads does both now.

• What stays the same:

  • hot keys are registered against tray.Handle;
  • balloons are Warning, and the update report is Info or Warning;
  • the icon shows its picture at once;
  • the active icon is the tracker's callbacks setting what the next turn shows.

• The cost: an open menu can be up to a tenth of a second behind the tracker, which the ids make safe. And the menu is built ten times a second while the tray is idle, as on Linux. The tracker's lists are cached, so nothing asks a socket or the disk to build it.

• Docs: CLAUDE.md. It also drops a stale mention of a macos-14 CI job; the macOS build is the unix job's macos-latest leg.

Tests.

• MenuBuilderTest shows the menu through MenuTray, a stand-in ITray that makes it as NotifyIconTray does, with the head's real options and turns and no icon in the notification area.
• Empty, Full, FullGrouped and SnapshotThatWasNotWrittenDropDown pass against their existing images, unchanged.
• AClickDoesWhatItsItemDoes now clicks and then takes a turn.
• A_group_named_after_a_fixed_item_is_removed_with_the_rest and Tracked_items_are_disposed_by_the_next_open are removed. No item is kept now, and MenuOnOpeningTests in PlatformHeads covers what's left of that.

Locally on Windows, against the published 0.10.0 packages, a Release build had no errors:

• DiffEngineTray.Tests passed 104.
• DiffEngineTray.Core.Tests passed 321, with 4 skipped.
• DiffEngineViewer.Tests passed 871, with 25 skipped.
• Packaging.Tests passed 53.

Not seen working. I didn't run the tray itself: one was already running on this machine, holding the mutex a second one exits on.