feat: initialize new React application structure with TypeScript, ESLint, and Prettier configurations, while removing legacy files and adding new components and pages for enhanced functionality

src/utils/format.ts

@@ -0,0 +1,70 @@
+/**
+ * 格式化工具函数
+ * 从原项目 src/utils/string.js 迁移
+ */
+
+/**
+ * 隐藏 API Key 中间部分
+ */
+export function maskApiKey(key: string, visibleChars: number = 4): string {
+  if (!key || key.length <= visibleChars * 2) {
+    return key;
+  }
+
+  const start = key.slice(0, visibleChars);
+  const end = key.slice(-visibleChars);
+  const maskedLength = Math.min(key.length - visibleChars * 2, 20);
+  const masked = '*'.repeat(maskedLength);
+
+  return `${start}${masked}${end}`;
+}
+
+/**
+ * 格式化文件大小
+ */
+export function formatFileSize(bytes: number): string {
+  if (bytes === 0) return '0 B';
+
+  const units = ['B', 'KB', 'MB', 'GB'];
+  const k = 1024;
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+
+  return `${(bytes / Math.pow(k, i)).toFixed(2)} ${units[i]}`;
+}
+
+/**
+ * 格式化日期时间
+ */
+export function formatDateTime(date: string | Date): string {
+  const d = typeof date === 'string' ? new Date(date) : date;
+
+  if (isNaN(d.getTime())) {
+    return 'Invalid Date';
+  }
+
+  return d.toLocaleString('zh-CN', {
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+    hour: '2-digit',
+    minute: '2-digit',
+    second: '2-digit'
+  });
+}
+
+/**
+ * 格式化数字（添加千位分隔符）
+ */
+export function formatNumber(num: number): string {
+  return num.toLocaleString('zh-CN');
+}
+
+/**
+ * 截断长文本
+ */
+export function truncateText(text: string, maxLength: number): string {
+  if (text.length <= maxLength) {
+    return text;
+  }
+  return text.slice(0, maxLength) + '...';
+}