Bit of cleanup

tools/editor/styles/components/preview-empty.css

@@ -0,0 +1,14 @@
+/* Component – Preview empty state */
+
+.preview-empty {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  color: var(--text-muted);
+  font-size: 0.875rem;
+  text-align: center;
+  white-space: nowrap;
+  user-select: none;
+  pointer-events: none;
+}