mod: 不使用FixedCrossAxisCount，改为MaxCrossAxisExtent

lib/utils/grid.dart

@@ -0,0 +1,12 @@
+import 'package:flutter/cupertino.dart';
+import 'storage.dart';
+class Grid {
+  static double maxRowWidth = GStrorage.setting.get(SettingBoxKey.maxRowWidth, defaultValue: 240.0) as double;
+
+  static double calculateActualWidth(BuildContext context, double maxCrossAxisExtent, double crossAxisSpacing) {
+    double screenWidth = MediaQuery.of(context).size.width;
+    int columnCount = ((screenWidth - crossAxisSpacing) / (maxCrossAxisExtent + crossAxisSpacing)).ceil();
+    double columnWidth = (screenWidth - crossAxisSpacing) ~/ columnCount - crossAxisSpacing;
+    return columnWidth;
+  }
+}

lib/utils/storage.dart

@@ -149,7 +149,7 @@ class SettingBoxKey {
       customColor = 'customColor', // 自定义主题色
       enableSingleRow = 'enableSingleRow', // 首页单列
       displayMode = 'displayMode',
-      customRows = 'customRows', // 自定义列
+      maxRowWidth = 'maxRowWidth', // 首页列最大宽度（dp）
       enableMYBar = 'enableMYBar',
       hideSearchBar = 'hideSearchBar', // 收起顶栏
       hideTabBar = 'hideTabBar', // 收起底栏