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/README.md

@@ -0,0 +1,36 @@
+# sino-mci-admin-web
+
+消息与客户互动中台管理后台，基于 Vue 3 + Element Plus + Vite。
+
+## 功能页面
+
+- 概览
+- 渠道主体
+- 渠道账号
+- 会话/群聊
+- 联系人
+- 标签
+- 发送记录（支持测试发送）
+- 入站流程
+
+## 本地开发
+
+```bash
+cd admin-web
+npm install
+npm run dev
+```
+
+访问 http://localhost:5173
+
+## 构建
+
+```bash
+npm run build
+```
+
+## Docker
+
+```bash
+docker build -t sino/mci-admin-web .
+```