perf: improve overall theme color matching

packages/@core/shared/constants/src/global.ts

@@ -0,0 +1,15 @@
+// --vben-content-client-height
+
+/**
+ * @zh_CN CSS 变量前缀
+ * @en_US CSS variable prefix
+ */
+const CSS_VARIABLE_PREFIX = '--vben';
+
+/**
+ * @zh_CN 布局内容高度 css变量
+ * @en_US Layout content height
+ */
+const CSS_VARIABLE_LAYOUT_CONTENT_HEIGHT = `${CSS_VARIABLE_PREFIX}-content-height`;
+
+export { CSS_VARIABLE_LAYOUT_CONTENT_HEIGHT, CSS_VARIABLE_PREFIX };