import number vs index button implemented

common/proto/tables_data.proto

@@ -208,6 +208,10 @@ message StageTableDataImportRequest {
 message TableDataImportRow {
   // Required. Data payload for one staged row.
   map<string, google.protobuf.Value> data = 1;
+  // Link columns whose text must be resolved against the target table's exact
+  // row display value, including text made only of digits. Unlisted columns
+  // retain the normal table-write link semantics.
+  repeated string link_display_columns = 2;
 }
 
 message StageTableDataImportResponse {