feat(ui):调整主题预览 UI

@@ -34,7 +34,7 @@ class StatusPreviewCard extends StatelessWidget {
         Column(
           children: [
             WatchThemeCharacterAvatar(
-              size: 60,
+              size: 56,
               assetPath: infoList[i].assetPath,
               imageUrl: infoList[i].imgUrl,
             ),

@@ -20,23 +20,22 @@ class WatchThemeCharacterAvatar extends StatelessWidget {
     return SizedBox(
       width: avatarSize,
       height: avatarSize,
-      child: Container(
+        child: ClipRRect(
+          borderRadius: BorderRadius.circular(16),
+          child: Container(
         width: avatarSize,
-        height: avatarSize,
-        decoration: const BoxDecoration(
-          color: Color(0xFFF5F2FF),
-          shape: BoxShape.circle,
-        ),
+            height: avatarSize,
         alignment: Alignment.center,
         child: empty || (assetPath == null && imageUrl == null)
             ? const SizedBox.shrink()
             : _buildImage(avatarSize),
       ),
+        )
     );
   }
 
   Widget _buildImage(double avatarSize) {
-    final width = avatarSize * 0.636;
+    final width = avatarSize;
     if (imageUrl != null && imageUrl!.isNotEmpty) {
       return Image.network(
         imageUrl!,