fix: plt/print preview window stacking

src/components/md-deck/PltPreview.tsx

@@ -1,4 +1,5 @@
 import { createSignal, For, Show, createMemo } from 'solid-js';
+import { Portal } from 'solid-js/web';
 import { parsePlt, extractCutPaths } from '../../plotcutter/parser';
 import { generateTravelPaths, travelPathsToSvg } from '../../plotcutter/layout';
 import type { CardPath } from '../../plotcutter/types';
@@ -91,10 +92,11 @@ export function PltPreview(props: PltPreviewProps) {
   };
 
   return (
-    <div class="fixed inset-0 bg-black/50 z-50 overflow-auto">
-      <div class="min-h-screen py-20 px-4">
-        {/* 头部控制栏 */}
-        <div class="fixed top-4 left-1/2 -translate-x-1/2 bg-white shadow-lg rounded-lg px-4 py-3 flex items-center gap-4 z-50">
+    <Portal>
+      <div class="fixed inset-0 bg-black/50 z-[60] overflow-auto">
+        <div class="min-h-screen py-20 px-4">
+          {/* 头部控制栏 */}
+          <div class="fixed top-4 left-1/2 -translate-x-1/2 bg-white shadow-lg rounded-lg px-4 py-3 flex items-center gap-4 z-50">
           <h2 class="text-base font-bold m-0">PLT 切割预览</h2>
           <div class="flex items-center gap-2 flex-1">
             <Show when={parsedData().width > 0}>
@@ -224,5 +226,6 @@ export function PltPreview(props: PltPreviewProps) {
         </div>
       </div>
     </div>
+    </Portal>
   );
 }