refactor: 调整聊天组件为按需引入

- 移除 bootstrap 中 vue-element-plus-x 全局组件注册

- 在聊天与会话页面改为局部引入对应组件

easyflow-ui-admin/app/src/views/publicChat/index.vue

@@ -4,6 +4,7 @@ import type {ServerSentEventMessage} from 'fetch-event-stream';
 
 import {computed, nextTick, onBeforeUnmount, onMounted, ref, watch} from 'vue';
 import {useRoute} from 'vue-router';
+import ElXMarkdown from 'vue-element-plus-x/es/XMarkdown/index.js';
 
 import {IconifyIcon} from '@easyflow/icons';
 import {$t} from '@easyflow/locales';