Fix Wayland internal UI lifecycle edge cases

internal/platform/wayland/keyboard.go

@@ -61,6 +61,7 @@ type Keyboard struct {
 	active           atomic.Bool
 	learn            atomic.Bool
 	learnEcho        atomic.Bool
+	uiEcho           atomic.Bool
 	uiSession        atomic.Uint64
 	uiSequence       atomic.Uint64
 	uiClose          atomic.Uint64