feat: translate graph of header #918 (#1428)

### What problem does this PR solve?

feat: translate graph of header #918
### Type of change


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

web/src/locales/zh.ts

@@ -57,6 +57,7 @@ export default {
       setting: '用户设置',
       logout: '登出',
       fileManager: '文件管理',
+      flow: '图',
     },
     knowledgeList: {
       welcome: '欢迎回来',