Merged in feature/IO-3499-React-19 (pull request #2887)

feature/IO-3499-React-19 - The great button refactor of 2026

client/src/App/App.container.jsx

@@ -3,7 +3,7 @@ import * as Sentry from "@sentry/react";
 import { SplitFactoryProvider, useSplitClient } from "@splitsoftware/splitio-react";
 import { ConfigProvider } from "antd";
 import enLocale from "antd/es/locale/en_US";
-import { useEffect } from "react";
+import { useEffect, useMemo } from "react";
 import { CookiesProvider } from "react-cookie";
 import { useTranslation } from "react-i18next";
 import { useDispatch, useSelector } from "react-redux";
@@ -44,15 +44,18 @@ function AppContainer() {
   const currentUser = useSelector(selectCurrentUser);
   const isDarkMode = useSelector(selectDarkMode);
 
-  const theme = () => getTheme(isDarkMode);
+  const theme = useMemo(() => getTheme(isDarkMode), [isDarkMode]);
 
-  const antdInput = () => ({ autoComplete: "new-password" });
+  const antdInput = useMemo(() => ({ autoComplete: "new-password" }), []);
 
-  const antdForm = () => ({
-    validateMessages: {
-      required: t("general.validation.required", { label: "${label}" })
-    }
-  });
+  const antdForm = useMemo(
+    () => ({
+      validateMessages: {
+        required: t("general.validation.required", { label: "${label}" })
+      }
+    }),
+    [t]
+  );
 
   // Global seamless logout listener with redirect to /signin
   useEffect(() => {