feat(admin): migrate admin UI to Vue3

admin-frontend/src/api/smtp.js

@@ -0,0 +1,32 @@
+import { api } from './client'
+
+export async function fetchSmtpConfigs() {
+  const { data } = await api.get('/smtp/configs')
+  return data
+}
+
+export async function createSmtpConfig(payload) {
+  const { data } = await api.post('/smtp/configs', payload)
+  return data
+}
+
+export async function updateSmtpConfig(configId, payload) {
+  const { data } = await api.put(`/smtp/configs/${configId}`, payload)
+  return data
+}
+
+export async function deleteSmtpConfig(configId) {
+  const { data } = await api.delete(`/smtp/configs/${configId}`)
+  return data
+}
+
+export async function testSmtpConfig(configId, email) {
+  const { data } = await api.post(`/smtp/configs/${configId}/test`, { email })
+  return data
+}
+
+export async function setPrimarySmtpConfig(configId) {
+  const { data } = await api.post(`/smtp/configs/${configId}/primary`)
+  return data
+}
+