Feat: Render agent details #3221 (#5307)

### What problem does this PR solve?

Feat: Render agent details #3221
### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/canvas/node/email-node.tsx

@@ -0,0 +1,78 @@
+import { IEmailNode } from '@/interfaces/database/flow';
+import { Handle, NodeProps, Position } from '@xyflow/react';
+import { Flex } from 'antd';
+import classNames from 'classnames';
+import { useState } from 'react';
+import { LeftHandleStyle, RightHandleStyle } from './handle-icon';
+import styles from './index.less';
+import NodeHeader from './node-header';
+
+export function EmailNode({
+  id,
+  data,
+  isConnectable = true,
+  selected,
+}: NodeProps<IEmailNode>) {
+  const [showDetails, setShowDetails] = useState(false);
+
+  return (
+    <section
+      className={classNames(styles.ragNode, {
+        [styles.selectedNode]: selected,
+      })}
+    >
+      <Handle
+        id="c"
+        type="source"
+        position={Position.Left}
+        isConnectable={isConnectable}
+        className={styles.handle}
+        style={LeftHandleStyle}
+      ></Handle>
+      <Handle
+        type="source"
+        position={Position.Right}
+        isConnectable={isConnectable}
+        className={styles.handle}
+        style={RightHandleStyle}
+        id="b"
+      ></Handle>
+      <NodeHeader id={id} name={data.name} label={data.label}></NodeHeader>
+
+      <Flex vertical gap={8} className={styles.emailNodeContainer}>
+        <div
+          className={styles.emailConfig}
+          onClick={() => setShowDetails(!showDetails)}
+        >
+          <div className={styles.configItem}>
+            <span className={styles.configLabel}>SMTP:</span>
+            <span className={styles.configValue}>{data.form?.smtp_server}</span>
+          </div>
+          <div className={styles.configItem}>
+            <span className={styles.configLabel}>Port:</span>
+            <span className={styles.configValue}>{data.form?.smtp_port}</span>
+          </div>
+          <div className={styles.configItem}>
+            <span className={styles.configLabel}>From:</span>
+            <span className={styles.configValue}>{data.form?.email}</span>
+          </div>
+          <div className={styles.expandIcon}>{showDetails ? '▼' : '▶'}</div>
+        </div>
+
+        {showDetails && (
+          <div className={styles.jsonExample}>
+            <div className={styles.jsonTitle}>Expected Input JSON:</div>
+            <pre className={styles.jsonContent}>
+              {`{
+  "to_email": "...",
+  "cc_email": "...", 
+  "subject": "...",
+  "content": "..."
+}`}
+            </pre>
+          </div>
+        )}
+      </Flex>
+    </section>
+  );
+}