refactor(frontend): split large reimbursement and audit modules

web/src/services/api.js

@@ -269,7 +269,9 @@ export async function apiRequest(path, options = {}) {
       globalThis.clearTimeout(timeoutId)
     }
     if (error?.name === 'AbortError') {
-      throw new Error(String(timeoutMessage || '').trim() || '接口请求超时，请稍后重试。')
+      const timeoutError = new Error(String(timeoutMessage || '').trim() || '接口请求超时，请稍后重试。')
+      timeoutError.code = 'REQUEST_TIMEOUT'
+      throw timeoutError
     }
     if (String(error?.message || '').includes('ByteString')) {
       throw new Error('当前登录用户信息包含浏览器不支持的请求头字符，请重新登录后重试。')

web/src/services/system.js

@@ -1,5 +1,8 @@
 import { apiRequest } from './api.js'
 
-export function fetchBackendHealth() {
-  return apiRequest('/health')
+export function fetchBackendHealth(options = {}) {
+  return apiRequest('/health', {
+    timeoutMs: Number(options.timeoutMs || 2500),
+    timeoutMessage: '后端健康检查超时，可能正在处理耗时任务。'
+  })
 }