优化图片预览显示效果

lib/widget/picker/bee_image_preview.dart

@@ -46,11 +46,11 @@ class _BeeImagePreviewState extends State<BeeImagePreview> {
         backgroundColor: Colors.black54,
         body: BackdropFilter(
           filter: ImageFilter.blur(sigmaX: 5, sigmaY: 5),
-          child: Center(
+          child: InteractiveViewer(
-            child: InteractiveViewer(
+            boundaryMargin: EdgeInsets.all(48),
-              minScale: 0.2,
+            minScale: 0.2,
-              child: image,
+            maxScale: 10,
-            ),
+            child: Center(child: image),
           ),
         ),
       ),

lib/widget/views/bee_grid_image_view.dart

@@ -16,6 +16,7 @@ class BeeGridImageView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    if (urls.isEmpty) return SizedBox();
     return GridView.builder(
       padding: padding,
       gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(