update edit node

api/main.proto

@@ -202,25 +202,25 @@ message GetGraphRsp {
   int32 countEdges = 4;
 
   message Edge {
-    int32 from = 1;
-    int32 to = 2;
+    string from = 1;
+    string to = 2;
     string arrows = 3;
     string type = 4;
   }
 }
 
 message UpdateNodeReq {
-  GraphNode node = 1;
+  string code = 1;
+  GraphNode node = 2;
 }
 
 message UpdateNodeRsp {}
 
 message GraphNode {
-  int32 id = 1;
-  string label = 2;
-  string name = 3;
-  string text = 4;
-  repeated GraphApplication applications = 5;
+  string code = 1;
+  string name = 2;
+  string text = 3;
+  repeated GraphApplication applications = 4;
 }
 
 message GraphApplication {