fix(grid): fix right fixed table header gutter style (#1542)

packages/theme/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@opentiny/vue-theme",
-  "version": "3.15.0",
+  "version": "3.15.1",
   "description": "An enterprise-class UI component library, support both Vue.js 2 and Vue.js 3, as well as PC and mobile.",
   "main": "index.css",
   "homepage": "https://opentiny.design/tiny-vue",
@@ -87,4 +87,4 @@
       ]
     }
   }
-}
+}

packages/theme/src/grid/table.less

@@ -1003,6 +1003,9 @@
     // 部分场景下浏览器缩放比例导致表头和表体错位问题
     th.col__gutter {
       width: 0;
+      position: sticky;
+      right: 0;
+      background-color: var(--ti-grid-header-background-color);
     }
   }