feat: 全新智能体功能

- 基于先进智能体框架，增加智能体编排功能
- 增加智能体聊天，并对接持久化

easyflow-ui-admin/app/src/components/ai-chat/AiReasoningCard.vue

@@ -0,0 +1,48 @@
+<script setup lang="ts">
+import {ref} from 'vue';
+
+import {ArrowDown, ArrowRight} from '@element-plus/icons-vue';
+import {ElButton, ElIcon} from 'element-plus';
+
+const props = defineProps<{
+  collapsed?: boolean;
+  text: string;
+}>();
+
+const open = ref(!props.collapsed);
+</script>
+
+<template>
+  <div class="ai-reasoning-card">
+    <ElButton class="ai-reasoning-card__toggle" link @click="open = !open">
+      <ElIcon>
+        <ArrowDown v-if="open" />
+        <ArrowRight v-else />
+      </ElIcon>
+      <span>思考</span>
+    </ElButton>
+    <div v-if="open" class="ai-reasoning-card__body">{{ text }}</div>
+  </div>
+</template>
+
+<style scoped>
+.ai-reasoning-card {
+  padding: 10px 12px;
+  color: var(--el-text-color-regular);
+  background: var(--el-fill-color-light);
+  border-radius: 8px;
+}
+
+.ai-reasoning-card__toggle {
+  height: 24px;
+  padding: 0;
+  color: var(--el-text-color-secondary);
+}
+
+.ai-reasoning-card__body {
+  margin-top: 8px;
+  font-size: 13px;
+  line-height: 20px;
+  white-space: pre-wrap;
+}
+</style>