前端适配：Money工具函数和Wallet API类型更新

核心改造：
1. Money工具函数：新增formatCent、formatCentWithSymbol、yuanToCent等函数
2. Wallet API类型：WalletAccount和WalletLedger改为*_cent字段
3. API请求函数：rechargeWallet和startWalletRechargePayment自动转换元为分
4. 文档：生成完整的前端适配指南

技术细节：
- formatCent: 分转角并格式化（四舍五入到0.1元）
- yuanToCent: 元转分（用于表单提交）
- API函数自动处理转换，组件层面仍使用元
- 生成详细的适配指南供后续组件修改参考

下一步：
- 按照前端适配指南修改所有Vue组件
- 测试金额显示和计算精度

frontend/src/features/wallet/api/wallet.ts

@@ -6,8 +6,8 @@ import type { PaymentOrder } from '@/features/orders/api/orders'
 
 export interface WalletAccount {
   user_id: number
-  available_balance: number
-  frozen_balance: number
+  available_balance_cent: number
+  frozen_balance_cent: number
   status: WalletStatus
 }
 
@@ -17,8 +17,8 @@ export interface WalletLedger {
   user_id: number
   order_id?: number
   direction: LedgerDirection
-  amount: number
-  balance_after: number
+  amount_cent: number
+  balance_after_cent: number
   balance_type: BalanceType
   biz_type: string
   biz_no: string
@@ -41,14 +41,16 @@ export async function fetchWalletLedger(page = 1, pageSize = 20) {
   return data.data
 }
 
-export async function rechargeWallet(amount: number) {
-  const { data } = await apiClient.post<ApiResponse<WalletAccount>>('/wallet/recharge', { amount })
+export async function rechargeWallet(amountYuan: number) {
+  const amount_cent = Math.round(amountYuan * 100)
+  const { data } = await apiClient.post<ApiResponse<WalletAccount>>('/wallet/recharge', { amount_cent })
   return data.data
 }
 
-export async function startWalletRechargePayment(amount: number) {
+export async function startWalletRechargePayment(amountYuan: number) {
+  const amount_cent = Math.round(amountYuan * 100)
   const { data } = await apiClient.post<ApiResponse<PaymentOrder>>('/wallet/recharge/pay', {
-    amount,
+    amount_cent,
   })
   return data.data
 }