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Complete React 19 upgrade with dependency and type fixes #2820

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30ee5ad
Initial plan
Copilot Nov 4, 2025
c5ae241
Upgrade React to v19 and update dependencies
Copilot Nov 4, 2025
cbf1e7a
Add legacy-peer-deps to .npmrc for React 19 compatibility
Copilot Nov 4, 2025
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1 change: 1 addition & 0 deletions app/frontend/.npmrc
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Original file line number Diff line number Diff line change
@@ -1,2 +1,3 @@
engine-strict=true
fund=false
legacy-peer-deps=true
1,450 changes: 788 additions & 662 deletions app/frontend/package-lock.json
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10 changes: 5 additions & 5 deletions app/frontend/package.json
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Expand Up @@ -14,17 +14,17 @@
"dependencies": {
"@azure/msal-browser": "^4.16.0",
"@azure/msal-react": "^3.0.16",
"@fluentui/react": "^8.112.5",
"@fluentui/react-components": "^9.56.2",
"@fluentui/react": "^8.125.0",
"@fluentui/react-components": "^9.72.4",
"@fluentui/react-icons": "^2.0.265",
"@react-spring/web": "^9.7.5",
"@react-spring/web": "^10.0.3",
"dompurify": "^3.2.4",
"i18next": "^24.2.0",
"i18next-browser-languagedetector": "^8.0.2",
"i18next-http-backend": "^3.0.1",
"idb": "^8.0.0",
"ndjson-readablestream": "^1.2.0",
"react": "^18.3.1",
"react": "^19.2.0",
"react-dom": "^19.2.0",
"react-helmet-async": "^2.0.5",
"react-i18next": "^15.4.1",
Expand All @@ -38,7 +38,7 @@
"devDependencies": {
"@types/dom-speech-recognition": "^0.0.7",
"@types/dompurify": "^3.0.5",
"@types/react": "^18.3.12",
"@types/react": "^19.2.2",
"@types/react-dom": "^19.2.2",
"@types/react-syntax-highlighter": "^15.5.13",
"@vitejs/plugin-react": "^4.3.3",
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2 changes: 1 addition & 1 deletion app/frontend/src/components/HelpCallout/HelpCallout.tsx
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Expand Up @@ -18,7 +18,7 @@ interface IHelpCalloutProps {
helpText: string;
}

export const HelpCallout = (props: IHelpCalloutProps): JSX.Element => {
export const HelpCallout = (props: IHelpCalloutProps) => {
const [isCalloutVisible, { toggle: toggleIsCalloutVisible }] = useBoolean(false);
const descriptionId: string = useId("description");
const iconButtonId: string = useId("iconButton");
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2 changes: 1 addition & 1 deletion app/frontend/src/pages/NoPage.tsx
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@@ -1,4 +1,4 @@
export function Component(): JSX.Element {
export function Component() {
return <h1>404</h1>;
}

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2 changes: 1 addition & 1 deletion app/frontend/src/pages/ask/Ask.tsx
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Expand Up @@ -19,7 +19,7 @@ import { TokenClaimsDisplay } from "../../components/TokenClaimsDisplay";
import { LoginContext } from "../../loginContext";
import { LanguagePicker } from "../../i18n/LanguagePicker";

export function Component(): JSX.Element {
export function Component() {
const [isConfigPanelOpen, setIsConfigPanelOpen] = useState(false);
const [promptTemplate, setPromptTemplate] = useState<string>("");
const [promptTemplatePrefix, setPromptTemplatePrefix] = useState<string>("");
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4 changes: 2 additions & 2 deletions app/frontend/src/pages/layout/Layout.tsx
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@@ -1,4 +1,4 @@
import React, { useState, useEffect, useRef, RefObject } from "react";
import React, { useState, useEffect, useRef } from "react";
import { Outlet, NavLink, Link } from "react-router-dom";
import { useTranslation } from "react-i18next";
import styles from "./Layout.module.css";
Expand All @@ -11,7 +11,7 @@ import { IconButton } from "@fluentui/react";
const Layout = () => {
const { t } = useTranslation();
const [menuOpen, setMenuOpen] = useState(false);
const menuRef: RefObject<HTMLDivElement> = useRef(null);
const menuRef = useRef<HTMLDivElement>(null);

const toggleMenu = () => {
setMenuOpen(!menuOpen);
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