fix(core): handle complex value stringification in Property component (#10604)

Fixes #10535

Author: Inspel

src/core/components/property.jsx

@@ -1,10 +1,11 @@
 import React from "react"
 import PropTypes from "prop-types"
+import { stringify } from "core/utils"
 
 export const Property = ({ propKey, propVal, propClass }) => {
     return (
         <span className={ propClass }>
-          <br />{ propKey }: { String(propVal) }</span>
+          <br />{ propKey }: { stringify(propVal) }</span>
     )
 }
 Property.propTypes = {

test/unit/core/utils.js

@@ -1,4 +1,4 @@
-import { Map, fromJS } from "immutable"
+import { Map, fromJS, OrderedMap } from "immutable"
 import {
   mapToList,
   parseSearch,
@@ -23,6 +23,7 @@ import {
   requiresValidationURL,
   extractFileNameFromContentDispositionHeader,
   deeplyStripKey,
+  stringify,
   paramToIdentifier,
   paramToValue,
   generateCodeVerifier,
@@ -1310,6 +1311,37 @@ describe("utils", () => {
     })
   })
 
+  describe("stringify", () => {
+    it("returns the string as-is", () => {
+      expect(stringify("hello")).toBe("hello")
+    })
+
+    it("converts Immutable objects to plain JS and stringifies", () => {
+      const immutableMap = OrderedMap({ key: "value" })
+      expect(stringify(immutableMap)).toBe('{\n  "key": "value"\n}')
+    })
+
+    it("stringifies plain JS objects", () => {
+      const obj = { key: "value" }
+      expect(stringify(obj)).toBe('{\n  "key": "value"\n}')
+    })
+
+    it("returns empty string for null or undefined", () => {
+      expect(stringify(null)).toBe("")
+      expect(stringify(undefined)).toBe("")
+    })
+
+    it("calls toString for numbers", () => {
+      expect(stringify(42)).toBe("42")
+    })
+
+    it("falls back to String() on JSON.stringify error", () => {
+      const circularObj = {}
+      circularObj.self = circularObj
+      expect(stringify(circularObj)).toBe("[object Object]")
+    })
+  })
+
   describe("parse and serialize search", () => {
     beforeEach(() => {
       // jsdom in Jest 25+ prevents modifying window.location,