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/services/api/usage.ts

@@ -0,0 +1,25 @@
+/**
+ * 使用统计相关 API
+ */
+
+import { apiClient } from './client';
+import { computeKeyStats, KeyStats } from '@/utils/usage';
+
+export const usageApi = {
+  /**
+   * 获取使用统计原始数据
+   */
+  getUsage: () => apiClient.get('/usage'),
+
+  /**
+   * 计算密钥成功/失败统计，必要时会先获取 usage 数据
+   */
+  async getKeyStats(usageData?: any): Promise<KeyStats> {
+    let payload = usageData;
+    if (!payload) {
+      const response = await apiClient.get('/usage');
+      payload = response?.usage ?? response;
+    }
+    return computeKeyStats(payload);
+  }
+};