refactor: 重构项目结构，迁移后端至 mengyastore-backend-go，新增 Java 后端、前端功能更新及部署文档

mengyastore-frontend/src/modules/admin/components/AdminChatPanel.vue

@@ -135,7 +135,7 @@ const load = async () => {
   loading.value = true
   try {
     conversations.value = await fetchAdminAllConversations(props.adminToken)
-    // Refresh current conversation messages if one is selected
+    // 若当前已选中某个会话，则刷新其消息列表
     if (selectedAccount.value) {
       currentMessages.value = conversations.value[selectedAccount.value] || []
       await scrollThreadBottom()

mengyastore-frontend/src/modules/admin/components/AdminOrderTable.vue

@@ -98,7 +98,7 @@ const pagedOrders = computed(() => {
   return props.orders.slice(start, start + PAGE_SIZE)
 })
 
-// Reset to page 1 when orders list changes
+// 订单列表变化时重置到第一页
 watch(() => props.orders.length, () => { currentPage.value = 1 })
 
 const remove = (id) => {

mengyastore-frontend/src/modules/admin/components/AdminSMTPRow.vue

@@ -5,26 +5,35 @@
       <span class="smtp-desc tag">下单/发货时自动给用户发送通知邮件（支持 QQ / 163 / Gmail / 自定义域名邮箱）</span>
       <span v-if="message" class="msg-tag" :class="{ error: message.includes('失败') }">{{ message }}</span>
     </div>
-    <div class="smtp-fields">
+    <div class="smtp-enable-row">
+      <label class="smtp-toggle">
+        <input type="checkbox" v-model="form.enabled" />
+        <span>启用邮件通知</span>
+      </label>
+      <span class="smtp-status-tag" :class="form.enabled ? 'tag-on' : 'tag-off'">
+        {{ form.enabled ? '已启用' : '已关闭' }}
+      </span>
+    </div>
+    <div class="smtp-fields" :class="{ 'smtp-fields-disabled': !form.enabled }">
       <label class="smtp-field">
         <span>发件邮箱</span>
-        <input v-model="form.email" type="email" placeholder="noreply@yourdomain.com" />
+        <input v-model="form.email" type="email" placeholder="noreply@yourdomain.com" :disabled="!form.enabled" />
       </label>
       <label class="smtp-field">
         <span>SMTP 密码 / 授权码</span>
-        <input v-model="form.password" type="password" placeholder="QQ/163 填授权码；其他填密码" autocomplete="new-password" />
+        <input v-model="form.password" type="password" placeholder="QQ/163 填授权码；其他填密码" autocomplete="new-password" :disabled="!form.enabled" />
       </label>
       <label class="smtp-field">
         <span>发件人名称</span>
-        <input v-model="form.fromName" type="text" placeholder="萌芽小店" />
+        <input v-model="form.fromName" type="text" placeholder="萌芽小店" :disabled="!form.enabled" />
       </label>
       <label class="smtp-field">
         <span>SMTP 主机</span>
-        <input v-model="form.host" type="text" placeholder="smtp.qq.com" />
+        <input v-model="form.host" type="text" placeholder="smtp.qq.com" :disabled="!form.enabled" />
       </label>
       <label class="smtp-field smtp-field-port">
         <span>端口</span>
-        <input v-model="form.port" type="text" placeholder="465" />
+        <input v-model="form.port" type="text" placeholder="465" :disabled="!form.enabled" />
       </label>
       <button class="primary smtp-save-btn" type="button" :disabled="saving" @click="save">
         {{ saving ? '保存中...' : '保存配置' }}
@@ -46,6 +55,7 @@ const emit = defineEmits(['save'])
 const saving = ref(false)
 
 const form = reactive({
+  enabled:  true,
   email:    '',
   password: '',
   fromName: '',
@@ -55,6 +65,7 @@ const form = reactive({
 
 watch(() => props.config, (cfg) => {
   if (!cfg) return
+  form.enabled  = cfg.enabled  !== false
   form.email    = cfg.email    || ''
   form.password = cfg.password || ''
   form.fromName = cfg.fromName || ''
@@ -101,6 +112,47 @@ const save = async () => {
   color: var(--muted);
 }
 
+.smtp-enable-row {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-bottom: 12px;
+}
+
+.smtp-toggle {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  cursor: pointer;
+  font-size: 14px;
+  color: var(--text);
+  font-weight: 500;
+}
+
+.smtp-toggle input[type="checkbox"] {
+  width: 16px;
+  height: 16px;
+  accent-color: var(--accent);
+  cursor: pointer;
+}
+
+.smtp-status-tag {
+  font-size: 12px;
+  font-weight: 600;
+  padding: 2px 8px;
+  border-radius: 999px;
+}
+
+.tag-on {
+  background: rgba(74, 222, 128, 0.15);
+  color: #2d8a4e;
+}
+
+.tag-off {
+  background: rgba(0,0,0,0.06);
+  color: #888;
+}
+
 .smtp-fields {
   display: flex;
   gap: 10px;
@@ -108,6 +160,11 @@ const save = async () => {
   align-items: flex-end;
 }
 
+.smtp-fields-disabled {
+  opacity: 0.45;
+  pointer-events: none;
+}
+
 .smtp-field {
   display: flex;
   flex-direction: column;

mengyastore-frontend/src/modules/admin/components/AdminTokenRow.vue

@@ -3,8 +3,7 @@
     <div class="form-field token-field">
       <label>管理 Token</label>
       <div class="token-input-wrap">
-        <input :value="token" @input="$emit('update:token', $event.target.value)" placeholder="粘贴 token 后自动加载…" />
-        <button class="ghost small" type="button" @click="$emit('auto-get')">自动获取</button>
+        <input :value="token" @input="$emit('update:token', $event.target.value)" placeholder="粘贴管理员令牌后自动加载…" />
       </div>
     </div>
     <p
@@ -28,7 +27,7 @@ defineProps({
   inlineMessage: { type: String, default: '' }
 })
 
-defineEmits(['update:token', 'auto-get'])
+defineEmits(['update:token'])
 </script>
 
 <style scoped>