v2.2.1: frontend closed-source + Docker one-click deploy

- Remove frontend source code (now in private repo)
- Add pre-built frontend/dist/ with Nginx serving
- Simplify docker-compose.yml (no Node.js build needed)
- Update README with docs index and Docker deploy guide
- Add admin order list and AI analysis stats tabs
- Add quick trade API routes
- Clean up redundant files (package-lock.json, yarn.lock, .iml)
- Add GitHub Actions workflow for frontend update automation

quantdinger_vue/src/components/MultiTab/index.js

@@ -1,40 +0,0 @@
-import events from './events'
-import MultiTab from './MultiTab'
-import './index.less'
-
-const api = {
-  /**
-   * open new tab on route fullPath
-   * @param config
-   */
-  open: function (config) {
-    events.$emit('open', config)
-  },
-  rename: function (key, name) {
-    events.$emit('rename', { key: key, name: name })
-  },
-  /**
-   * close current page
-   */
-  closeCurrentPage: function () {
-    this.close()
-  },
-  /**
-   * close route fullPath tab
-   * @param config
-   */
-  close: function (config) {
-    events.$emit('close', config)
-  }
-}
-
-MultiTab.install = function (Vue) {
-  if (Vue.prototype.$multiTab) {
-    return
-  }
-  api.instance = events
-  Vue.prototype.$multiTab = api
-  Vue.component('MultiTab', MultiTab)
-}
-
-export default MultiTab