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/components/chat/chat.vue

@@ -1,5 +1,4 @@
 <script setup lang="ts">
-import type { Sender } from 'vue-element-plus-x';
 import type {
   BubbleListInstance,
   BubbleListProps,
@@ -11,6 +10,10 @@ import type { BotInfo, ChatMessage } from '@easyflow/types';
 
 import { nextTick, onBeforeUnmount, onMounted, ref, watch, watchEffect } from 'vue';
 import { useRoute, useRouter } from 'vue-router';
+import ElBubbleList from 'vue-element-plus-x/es/BubbleList/index.js';
+import ElSender from 'vue-element-plus-x/es/Sender/index.js';
+import ElThinking from 'vue-element-plus-x/es/Thinking/index.js';
+import ElXMarkdown from 'vue-element-plus-x/es/XMarkdown/index.js';
 
 import { IconifyIcon } from '@easyflow/icons';
 import { $t } from '@easyflow/locales';
@@ -85,7 +88,7 @@ const bubbleListRef = ref<BubbleListInstance>();
 const messageContainerRef = ref<HTMLElement | null>(null);
 const bubbleListScrollElement = ref<HTMLElement | null>(null);
 const showBackToBottomButton = ref(false);
-const senderRef = ref<InstanceType<typeof Sender>>();
+const senderRef = ref<InstanceType<typeof ElSender>>();
 const senderValue = ref('');
 const sending = ref(false);
 const BACK_TO_BOTTOM_THRESHOLD = 160;