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/begin-node.tsx

@@ -0,0 +1,72 @@
+import { useTheme } from '@/components/theme-provider';
+import { IBeginNode } from '@/interfaces/database/flow';
+import { Handle, NodeProps, Position } from '@xyflow/react';
+import { Flex } from 'antd';
+import classNames from 'classnames';
+import get from 'lodash/get';
+import { useTranslation } from 'react-i18next';
+import {
+  BeginQueryType,
+  BeginQueryTypeIconMap,
+  Operator,
+  operatorMap,
+} from '../../constant';
+import { BeginQuery } from '../../interface';
+import OperatorIcon from '../../operator-icon';
+import { RightHandleStyle } from './handle-icon';
+import styles from './index.less';
+
+// TODO: do not allow other nodes to connect to this node
+export function BeginNode({ selected, data }: NodeProps<IBeginNode>) {
+  const { t } = useTranslation();
+  const query: BeginQuery[] = get(data, 'form.query', []);
+  const { theme } = useTheme();
+  return (
+    <section
+      className={classNames(
+        styles.ragNode,
+        theme === 'dark' ? styles.dark : '',
+        {
+          [styles.selectedNode]: selected,
+        },
+      )}
+    >
+      <Handle
+        type="source"
+        position={Position.Right}
+        isConnectable
+        className={styles.handle}
+        style={RightHandleStyle}
+      ></Handle>
+
+      <Flex align="center" justify={'center'} gap={10}>
+        <OperatorIcon
+          name={data.label as Operator}
+          fontSize={24}
+          color={operatorMap[data.label as Operator].color}
+        ></OperatorIcon>
+        <div className="truncate text-center font-semibold text-sm">
+          {t(`flow.begin`)}
+        </div>
+      </Flex>
+      <Flex gap={8} vertical className={styles.generateParameters}>
+        {query.map((x, idx) => {
+          const Icon = BeginQueryTypeIconMap[x.type as BeginQueryType];
+          return (
+            <Flex
+              key={idx}
+              align="center"
+              gap={6}
+              className={styles.conditionBlock}
+            >
+              <Icon className="size-4" />
+              <label htmlFor="">{x.key}</label>
+              <span className={styles.parameterValue}>{x.name}</span>
+              <span className="flex-1">{x.optional ? 'Yes' : 'No'}</span>
+            </Flex>
+          );
+        })}
+      </Flex>
+    </section>
+  );
+}