feat(admin-web): add Vue 3 admin console and deployment configs

- Add admin-web/ with Vite + Vue 3 + Element Plus + Vue Router
- Add 8 management pages: dashboard, channel subject/account, conversation,
  person, tag, send record (with test send), inbound flow
- Add API client modules for account/channel/crm/send/flow
- Add Dockerfile and nginx config for admin-web
- Add Dockerfile for mci-server
- Add docker-compose.app.yml for one-command app deployment
- Add K8s deployment manifests for backend/admin-web/channel-service
- Update scripts/local-up.sh with shared network and --with-apps option

admin-web/src/components/Layout.vue

@@ -0,0 +1,72 @@
+<template>
+  <el-container class="layout">
+    <el-aside width="200px" class="sidebar">
+      <div class="logo">Sino MCI</div>
+      <el-menu :default-active="$route.path" router>
+        <el-menu-item index="/dashboard">
+          <span>概览</span>
+        </el-menu-item>
+        <el-menu-item index="/channel-subject">
+          <span>渠道主体</span>
+        </el-menu-item>
+        <el-menu-item index="/channel-account">
+          <span>渠道账号</span>
+        </el-menu-item>
+        <el-menu-item index="/conversation">
+          <span>会话/群聊</span>
+        </el-menu-item>
+        <el-menu-item index="/person">
+          <span>联系人</span>
+        </el-menu-item>
+        <el-menu-item index="/tag">
+          <span>标签</span>
+        </el-menu-item>
+        <el-menu-item index="/send-record">
+          <span>发送记录</span>
+        </el-menu-item>
+        <el-menu-item index="/inbound-flow">
+          <span>入站流程</span>
+        </el-menu-item>
+      </el-menu>
+    </el-aside>
+    <el-container>
+      <el-header class="header">
+        <span>{{ $route.meta.title || '消息中台' }}</span>
+      </el-header>
+      <el-main>
+        <router-view />
+      </el-main>
+    </el-container>
+  </el-container>
+</template>
+
+<script setup lang="ts">
+import { useRoute } from 'vue-router'
+const route = useRoute()
+</script>
+
+<style scoped>
+.layout {
+  height: 100vh;
+}
+.sidebar {
+  background: #fff;
+  border-right: 1px solid #e4e7ed;
+}
+.logo {
+  height: 60px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 18px;
+  font-weight: bold;
+  border-bottom: 1px solid #e4e7ed;
+}
+.header {
+  background: #fff;
+  border-bottom: 1px solid #e4e7ed;
+  display: flex;
+  align-items: center;
+  font-weight: 500;
+}
+</style>