积分充值全流程落地：申请审核入账、凭证上传压缩转webp、管理员调账收权

- 新增积分充值申请与审核：商户提交充值申请（凭证图片必填，1元=100积分），
  管理员审核通过后事务内自动入账，幂等键防重复
- 新增通用图片上传组件 ImageUploader：canvas 压缩转 webp、预览、删除，
  后端按魔数校验图片格式并持久化到 data/uploads
- 管理员钱包调整改为按商户维度：移除商户侧调账接口，新增管理员
  平台商户积分调整与钱包流水查看
- 低余额 Webhook 告警配置持久化，充值入账/调账后自动检查推送
- 平台商户操作列移除进入/成员，积分充值页接入真实接口并修复金额单位换算

frontend/src/api/index.ts

@@ -12,11 +12,13 @@ import type {
   DeliverySubmitResult,
   FulfillmentOrder,
   LoginResult,
+  LowBalanceAlertConfig,
   Merchant,
   MerchantMember,
   MerchantProduct,
   PageResult,
   ProductCatalogItem,
+  RechargeApplication,
   User,
   WalletAccount,
   WalletLedgerEntry,
@@ -99,6 +101,26 @@ export const merchantApi = {
     request.get('/merchant/members').then((r) => r.data.data as MerchantMember[]),
   addMember: (data: { user_id: number; role: MerchantMember['role']; is_default?: boolean }) =>
     request.post('/merchant/members', data).then((r) => r.data.data as MerchantMember),
+  rechargeApplications: (params?: Record<string, unknown>) =>
+    request.get('/merchant/recharge/applications', { params }).then((r) => r.data.data as PageResult<RechargeApplication>),
+  createRechargeApplication: (data: { amount_cny: number; vouchers: string[]; note?: string }) =>
+    // amount_cny 单位：分（1元 = 100分），积分按 1元 = 100积分 折算
+    request.post('/merchant/recharge/applications', data).then((r) => r.data.data as RechargeApplication),
+  alertConfig: () =>
+    request.get('/merchant/recharge/alert-config').then((r) => r.data.data as LowBalanceAlertConfig),
+  saveAlertConfig: (data: LowBalanceAlertConfig) =>
+    request.put('/merchant/recharge/alert-config', data).then((r) => r.data.data as LowBalanceAlertConfig),
+}
+
+export const uploadApi = {
+  file: (file: File) => {
+    const form = new FormData()
+    form.append('file', file)
+    return request.post('/upload', form, {
+      headers: { 'Content-Type': 'multipart/form-data' },
+      timeout: 60000,
+    }).then((r) => r.data.data as { url: string })
+  },
 }
 
 export const deliveryApi = {
@@ -158,4 +180,8 @@ export const platformApi = {
     request.get(`/platform/merchants/${merchantId}/wallet/ledger`, { params }).then((r) => r.data.data as PageResult<WalletLedgerEntry>),
   adjustWallet: (merchantId: number, data: { amount: number; idempotency_key: string; note?: string }) =>
     request.post(`/platform/merchants/${merchantId}/wallet/adjust`, data).then((r) => r.data.data as WalletAccount),
+  rechargeApplications: (params?: Record<string, unknown>) =>
+    request.get('/platform/recharge/applications', { params }).then((r) => r.data.data as PageResult<RechargeApplication>),
+  reviewRechargeApplication: (id: number, data: { approved: boolean; review_note?: string }) =>
+    request.post(`/platform/recharge/applications/${id}/review`, data).then((r) => r.data.data as RechargeApplication),
 }