Refine shell status controls and glass rendering; defer cursor redraw safely

shell/ferese-shell/assets/icons/status/airplane.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round">
+  <path d="M12 3c-.9 0-1.5.7-1.5 1.7V9L3 13v2l7.5-2v4.5L8 19v1.5l4-1 4 1V19l-2.5-1.5V13l7.5 2v-2l-7.5-4V4.7C13.5 3.7 12.9 3 12 3Z"/>
+</svg>