The app learns Appearance — Auto, Light, Dark from the View menu and a toolbar pull-down

View ▸ Appearance (11-command-nexus.md): three radio-exclusive rows,
app-wide, persisted, needing no window in front — the View menu's new
last group. AppearanceStore owns the override's rules (absent key =
Auto, lenient reads degrade to Auto, remove-at-default) with an
injectable apply seam so test hosts never touch NSApp; the one real
apply hands NSApp.appearance its answer in applicationDidFinishLaunching,
the global side effect KanbanApp.init must not carry. The board toolbar
gains its first .picker item — an NSMenuToolbarItem whose rows re-fetch
their spec fresh, checkmark read at menu-open like every other menu row —
and Appearance joins the search field as the second default item,
centered beside it (03-board-ui.md ▸ Toolbar, ratified 2026-08-07).

Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy

KanbanTests/HistoryProviderTests.swift

@@ -841,6 +841,7 @@ struct UndoCommandSurfaceTests {
             store: store,
             search: BoardSearchPresentation(),
             zoom: BoardZoomStore(defaults: UserDefaults(suiteName: "dev.rzen.indie.Kanban.history-tests.\(UUID().uuidString)")!),
+            appearance: AppearanceStore(defaults: UserDefaults(suiteName: "dev.rzen.indie.Kanban.history-tests.\(UUID().uuidString)")!, apply: { _ in }),
             session: DragSession()
         )
         let provider = FakeHistoryProvider()
@@ -899,6 +900,7 @@ struct UndoCommandSurfaceTests {
             store: store,
             search: BoardSearchPresentation(),
             zoom: BoardZoomStore(defaults: UserDefaults(suiteName: zoomDomain)!),
+            appearance: AppearanceStore(defaults: UserDefaults(suiteName: zoomDomain + ".appearance")!, apply: { _ in }),
             session: DragSession()
         )
         let provider = FakeHistoryProvider()
@@ -944,6 +946,7 @@ struct UndoCommandSurfaceTests {
             store: store,
             search: BoardSearchPresentation(),
             zoom: BoardZoomStore(defaults: UserDefaults(suiteName: "dev.rzen.indie.Kanban.history-tests.\(UUID().uuidString)")!),
+            appearance: AppearanceStore(defaults: UserDefaults(suiteName: "dev.rzen.indie.Kanban.history-tests.\(UUID().uuidString)")!, apply: { _ in }),
             session: DragSession()
         )