fix(scene-fusion): restore light UI and fix mode select overlay in dialog

components/scene-fusion-dialog.tsx

@@ -19,15 +19,17 @@ interface SceneFusionDialogProps {
 export function SceneFusionDialog({ open, onOpenChange, onBatchAddToCanvas }: SceneFusionDialogProps) {
   return (
     <Dialog open={open} onOpenChange={onOpenChange}>
-      <DialogContent className="z-[20000] max-w-6xl h-[92vh] flex flex-col p-0 gap-0 overflow-hidden !bg-white dark:!bg-zinc-950">
+      <DialogContent className="max-w-6xl h-[92vh] flex flex-col p-0 gap-0 overflow-hidden bg-white">
         <DialogHeader className="sr-only">
           <DialogTitle>批量处理</DialogTitle>
           <DialogDescription>批量处理图片与场景裂变。</DialogDescription>
         </DialogHeader>
-        <div className="relative flex-1 min-h-0">
-          <div className="absolute inset-0 bg-white dark:bg-zinc-950 pointer-events-none" />
-          <div className="relative z-10 h-full">
-            <SceneFusionView onBack={() => onOpenChange(false)} onBatchAddToCanvas={onBatchAddToCanvas} />
+        <div className="h-full min-h-0 flex-1 bg-white">
+          <div className="h-full">
+            <SceneFusionView
+              onBack={() => onOpenChange(false)}
+              onBatchAddToCanvas={onBatchAddToCanvas}
+            />
           </div>
         </div>
       </DialogContent>