fix: prevent stale popup background regions

Tests/ConjureKitTests/ActionsBackgroundTests.swift

@@ -45,7 +45,6 @@ import Testing
     var selections: [Bool] = []
     popup.selectProvider = { selections.append($0) }
     popup.showProviders(selectedOpenAI: true, relativeTo: anchor)
-    host.layoutSubtreeIfNeeded()
     let rect = popup.view.convert(popup.view.bounds, to: host)
     #expect(rect.maxY == pill.frame.maxY)
     #expect(rect.minY < pill.frame.minY)
@@ -56,7 +55,6 @@ import Testing
     // Reopen during the close animation, then switch modes without retaining the old anchor.
     popup.showTranslation(relativeTo: anchor)
     popup.showProviders(selectedOpenAI: false, relativeTo: anchor)
-    host.layoutSubtreeIfNeeded()
     #expect(popup.view.convert(popup.view.bounds, to: host).maxY == pill.frame.maxY)
     popup.moveSelection(by: 1)
     _ = popup.handle(#selector(NSResponder.insertNewline(_:)))