feat: 添加高优先级投标折叠功能并优化链接样式

为高优先级投标表格添加折叠/展开功能，当数据为空时自动折叠
优化链接样式，统一设置无下划线及悬停颜色

frontend/src/components/Bids.vue

@@ -76,3 +76,14 @@ const handleSizeChange = (size: number) => {
   emit('fetch', currentPage.value, pageSize.value, selectedSource.value || undefined)
 }
 </script>
+
+<style scoped>
+a {
+  text-decoration: none;
+  color: inherit;
+}
+
+a:hover {
+  color: #409eff;
+}
+</style>