feat(admin): 新增短信平台管理功能

- 新增短信主控服务和额度商品的API接口
- 添加短信平台管理菜单项，包含主控服务管理和额度商品管理子菜单
- 实现短信平台管理相关路由配置
- 创建短信额度商品管理页面，支持额度类型配置、商品管理等功

src/api/admin/smsService.js

@@ -0,0 +1,51 @@
+import { http2 } from '@/utils/request.js'
+
+// ========== 短信主控服务 ==========
+
+export const getSmsServiceList = (params) => {
+  return http2.get('/api/v1/admin/server/sms_service/list', { params })
+}
+
+export const createSmsService = (data) => {
+  return http2.post('/api/v1/admin/server/sms_service/create', data, {
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
+  })
+}
+
+export const updateSmsService = (data) => {
+  return http2.post('/api/v1/admin/server/sms_service/update', data, {
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
+  })
+}
+
+export const deleteSmsService = (data) => {
+  return http2.delete('/api/v1/admin/server/sms_service/delete', {
+    data,
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
+  })
+}
+
+// ========== 短信额度商品 ==========
+
+export const getSmsGoodsList = (params) => {
+  return http2.get('/api/v1/admin/server/sms_service/goods/list', { params })
+}
+
+export const createSmsGoods = (data) => {
+  return http2.post('/api/v1/admin/server/sms_service/goods/create', data, {
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
+  })
+}
+
+export const updateSmsGoods = (data) => {
+  return http2.post('/api/v1/admin/server/sms_service/goods/update', data, {
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
+  })
+}
+
+export const deleteSmsGoods = (data) => {
+  return http2.delete('/api/v1/admin/server/sms_service/goods/delete', {
+    data,
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
+  })
+}