fix:修复打包失败的问题

docs/.vitepress/theme/utils/index.ts

@@ -0,0 +1,33 @@
+const pattern
+    = /[a-zA-Z0-9_\u0392-\u03C9\u00C0-\u00FF\u0600-\u06FF\u0400-\u04FF]+|[\u4E00-\u9FFF\u3400-\u4DBF\uF900-\uFAFF\u3040-\u309F\uAC00-\uD7AF]+/g
+
+export const countWord = (data: string)=> {
+    const m = data.match(pattern)
+    let count = 0
+    if (!m) {
+        return 0
+    }
+    for (let i = 0; i < m.length; i += 1) {
+        if (m[i].charCodeAt(0) >= 0x4E00) {
+            count += m[i].length
+        }
+        else {
+            count += 1
+        }
+    }
+    return count
+}
+
+/**
+ * 判断是否为移动端
+ */
+export const isMobile = (): boolean => {
+    if (typeof window === 'undefined') {
+        return false;
+    }
+
+    const userAgent = navigator.userAgent;
+    const mobileRegex = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i;
+
+    return mobileRegex.test(userAgent);
+}