feat: fetch flow (#1068)

### What problem does this PR solve?
feat: fetch flow #918 
feat: save graph

### Type of change


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

web/src/pages/flow/interface.ts

@@ -1,4 +1,4 @@
-import { Edge, Node } from 'reactflow';
+import { FormInstance } from 'antd';
 
 export interface DSLComponentList {
   id: string;
@@ -7,6 +7,7 @@ export interface DSLComponentList {
 
 export interface IOperatorForm {
   onValuesChange?(changedValues: any, values: any): void;
+  form?: FormInstance;
 }
 
 export interface IBeginForm {
@@ -40,23 +41,3 @@ export type NodeData = {
   color: string;
   form: IBeginForm | IRetrievalForm | IGenerateForm;
 };
-
-export interface IFlow {
-  avatar: null;
-  canvas_type: null;
-  create_date: string;
-  create_time: number;
-  description: null;
-  dsl: {
-    answer: any[];
-    components: DSLComponentList;
-    graph: { nodes: Node[]; edges: Edge[] };
-    history: any[];
-    path: string[];
-  };
-  id: string;
-  title: string;
-  update_date: string;
-  update_time: number;
-  user_id: string;
-}