tweaks to support unexpected types gracefully

src/components/CellViews/DateTimeCell.js

@@ -1,12 +1,12 @@
 import { format, isValid } from "date-fns";
+export const dateTimeFormat = "MMM dd yyyy, HH:mm:ss";
 
 export const DateTimeCell = (column) => {
   const date = new Date(column.value);
-  const dateFormat = "MMM dd yyyy, HH:mm:ss";
 
   return column.value ? (
     <div style={{ whiteSpace: "nowrap" }}>
-      {isValid(date) ? format(date, dateFormat) : ""}
+      {isValid(date) ? format(date, dateTimeFormat) : ""}
     </div>
   ) : (
     ""

src/components/CellViews/StringCell.js

@@ -1,7 +1,11 @@
-const valueToString = (value) => {
+import { format, isValid } from "date-fns";
+import { dateTimeFormat } from "./DateTimeCell";
+
+export const valueToString = (value) => {
   if (typeof value === "string") return value;
   /* if undefined or null we'll treat it as empty string */
   if (value === undefined || value === null) return "";
+  if (value instanceof Date && isValid(value)) return format(value, dateTimeFormat);
 
   try {
     /* JSON.stringify will handle JSON and non-strings, non-null, non-undefined */