Upgrade frontend to Node 26, React 19, Vite 8, Apollo Client 4 and ESLint 10

.gitea/workflows/tests.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   build_frontend:
     runs-on: ubuntu-latest
-    container: node:20-alpine
+    container: node:26-alpine
     steps:
       - uses: actions/checkout@v4
       - name: Build frontend
@@ -18,7 +18,7 @@ jobs:
 
   tests:
     runs-on: ubuntu-latest
-    container: nikolaik/python-nodejs:python3.14-nodejs20
+    container: nikolaik/python-nodejs:python3.14-nodejs26
     steps:
       - uses: actions/checkout@v4
 

frontend/.eslintignore

@@ -1 +0,0 @@
-src/types.ts

frontend/.eslintrc.js

@@ -1,54 +0,0 @@
-module.exports = {
-  env: {
-    browser: true,
-  },
-  parser: "@typescript-eslint/parser",
-  parserOptions: {
-    ecmaVersion: 2020,
-    sourceType: "module",
-  },
-  extends: [
-    "plugin:prettier/recommended",
-    "plugin:react/recommended",
-    "plugin:import/errors",
-    "plugin:import/warnings",
-    "plugin:import/typescript",
-    "plugin:react/recommended",
-    "plugin:@typescript-eslint/recommended",
-  ],
-  rules: {
-    "no-console": "off",
-    "prefer-destructuring": "off",
-    "import/no-unresolved": ["error", { ignore: ["\\?react$"] }],
-    "import/no-extraneous-dependencies": [
-      "error",
-      {
-        devDependencies: ["**/*.test.js", "**/*.spec.js", "**/__tests__/**"],
-      },
-    ],
-    "import/prefer-default-export": "off",
-    "import/order": [
-      "error",
-      {
-        groups: ["builtin", "external", "internal", ["parent", "sibling", "index"]],
-        "newlines-between": "always",
-        alphabetize: { order: "asc" },
-      },
-    ],
-    "react-hooks/exhaustive-deps": "error",
-    "react-hooks/rules-of-hooks": "error",
-    "react/button-has-type": "error",
-    "react/jsx-filename-extension": ["warn", { extensions: [".js", ".jsx", ".ts", ".tsx"] }],
-    "react/jsx-uses-react": "off",
-    "react/prefer-stateless-function": "warn",
-    "react/prop-types": "off",
-    "react/react-in-jsx-scope": "off",
-    "react/sort-comp": "off",
-  },
-  plugins: ["prettier", "react", "react-hooks"],
-  settings: {
-    react: {
-      version: "detect",
-    },
-  },
-};

frontend/.nvmrc

@@ -1 +1 @@
-v20
+v26

frontend/eslint.config.js

@@ -0,0 +1,54 @@
+import js from "@eslint/js";
+import globals from "globals";
+import tseslint from "typescript-eslint";
+import reactHooks from "eslint-plugin-react-hooks";
+import reactRefresh from "eslint-plugin-react-refresh";
+import importPlugin from "eslint-plugin-import-x";
+import prettier from "eslint-plugin-prettier/recommended";
+import { defineConfig, globalIgnores } from "eslint/config";
+
+export default defineConfig([
+  globalIgnores(["dist", "src/types.ts"]),
+  {
+    files: ["**/*.{ts,tsx}"],
+    extends: [
+      js.configs.recommended,
+      tseslint.configs.recommended,
+      reactHooks.configs.flat.recommended,
+      reactRefresh.configs.vite,
+      prettier,
+    ],
+    plugins: {
+      "import-x": importPlugin,
+    },
+    languageOptions: {
+      globals: globals.browser,
+    },
+    settings: {
+      react: {
+        version: "detect",
+      },
+    },
+    rules: {
+      "no-console": "off",
+      "prefer-destructuring": "off",
+      "import-x/no-extraneous-dependencies": [
+        "error",
+        {
+          devDependencies: ["**/*.test.ts", "**/*.spec.ts", "**/__tests__/**"],
+        },
+      ],
+      "import-x/prefer-default-export": "off",
+      "import-x/order": [
+        "error",
+        {
+          groups: ["builtin", "external", "internal", ["parent", "sibling", "index"]],
+          "newlines-between": "always",
+          alphabetize: { order: "asc" },
+        },
+      ],
+      "react-hooks/exhaustive-deps": "error",
+      "react-hooks/rules-of-hooks": "error",
+    },
+  },
+]);

frontend/package.json

@@ -3,8 +3,8 @@
   "version": "1.0.0",
   "private": true,
   "scripts": {
-    "build": "tsc && vite build",
-    "check-types": "tsc",
+    "build": "tsc -b && vite build",
+    "check-types": "tsc -b",
     "dev": "vite",
     "format:js": "eslint --fix src",
     "format:styles": "prettier --write \"src/**/*.css\"",
@@ -16,45 +16,53 @@
     "test": "node --test"
   },
   "dependencies": {
-    "@apollo/client": "^3.14.1",
+    "@apollo/client": "^4.2.0",
     "@nivo/bar": "^0.99.0",
     "@nivo/line": "^0.99.0",
     "@nivo/pie": "^0.99.0",
-    "clsx": "^1.1.1",
-    "date-fns": "^2.28.0",
-    "graphql": "^16.3.0",
-    "react": "^18.3.1",
-    "react-dom": "^18.3.1",
-    "react-hook-form": "^7.30.0",
+    "clsx": "^2.1.1",
+    "date-fns": "^4.3.0",
+    "graphql": "^16.14.0",
+    "react": "^19.2.6",
+    "react-dom": "^19.2.6",
+    "react-hook-form": "^7.76.1",
     "react-router-dom": "^7.18.4",
     "use-url-search-params": "^2.5.1"
   },
   "devDependencies": {
+    "@babel/core": "^7.29.7",
+    "@eslint/js": "^10.0.1",
     "@graphql-codegen/core": "^6.2.2",
-    "@graphql-codegen/typescript": "^6.1.2",
     "@graphql-codegen/typed-document-node": "^7.2.0",
+    "@graphql-codegen/typescript": "^6.1.2",
     "@graphql-codegen/typescript-operations": "^6.1.10",
     "@graphql-typed-document-node/core": "^3.1.1",
-    "@types/react": "^18.3.28",
-    "@types/react-dom": "^18.3.7",
-    "@typescript-eslint/eslint-plugin": "^8.72.0",
-    "@typescript-eslint/parser": "^8.72.0",
-    "eslint": "^8.57.1",
+    "@rolldown/plugin-babel": "^0.2.3",
+    "@types/babel__core": "^7.20.5",
+    "@types/node": "^26.6.5",
+    "@types/react": "^19.2.15",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^6.0.2",
+    "babel-plugin-react-compiler": "^1.0.0",
+    "eslint": "^10.4.0",
     "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-import": "^2.26.0",
+    "eslint-plugin-import-x": "^4.16.2",
     "eslint-plugin-prettier": "^5.5.7",
-    "eslint-plugin-react": "^7.29.4",
-    "eslint-plugin-react-hooks": "^4.4.0",
+    "eslint-plugin-react-hooks": "^7.1.1",
+    "eslint-plugin-react-refresh": "^0.5.2",
+    "globals": "^17.6.0",
     "prettier": "^3.6.2",
-    "typescript": "^5.9.3",
-    "vite": "^6.4.5",
+    "typescript": "~6.0.3",
+    "typescript-eslint": "^8.60.0",
+    "vite": "^8.0.14",
     "vite-plugin-svgr": "^5.2.0",
     "yaml": "^2.8.1"
   },
   "engines": {
-    "node": "20"
+    "node": "26"
   },
   "overrides": {
     "@whatwg-node/promise-helpers": "^1.3.2"
-  }
+  },
+  "type": "module"
 }

frontend/src/App.tsx

@@ -1,4 +1,4 @@
-import { ApolloProvider } from "@apollo/client";
+import { ApolloProvider } from "@apollo/client/react";
 import React from "react";
 import { BrowserRouter as Router } from "react-router-dom";
 
@@ -11,7 +11,7 @@ import { Toast } from "./components/Toast";
 import { ToastProvider } from "./components/ToastProvider";
 import { Wireframe } from "./components/Wireframe";
 
-const App = (): JSX.Element => (
+const App = (): React.JSX.Element => (
   <ApolloProvider client={client}>
     <Router>
       <ToastProvider>

frontend/src/Routes.tsx

@@ -16,7 +16,7 @@ const UserStats = React.lazy(() => import("./features/stats/UserStats"));
 const UserDetail = React.lazy(() => import("./features/users/UserDetail"));
 const UserList = React.lazy(() => import("./features/users/UserList"));
 
-export const Routes = (): JSX.Element => (
+export const Routes = (): React.JSX.Element => (
   <React.Suspense fallback={<div>Loading...</div>}>
     <ReactRouterRoutes>
       <Route path="/deposit" element={<Deposit />} />

frontend/src/client.ts

@@ -1,7 +1,7 @@
-import { ApolloClient, InMemoryCache } from "@apollo/client";
+import { ApolloClient, HttpLink, InMemoryCache } from "@apollo/client";
 
 const client = new ApolloClient({
-  uri: import.meta.env.DEV ? "/graphql/" : `${import.meta.env.VITE_API_URL}/graphql/`,
+  link: new HttpLink({ uri: import.meta.env.DEV ? "/graphql/" : `${import.meta.env.VITE_API_URL}/graphql/` }),
   cache: new InMemoryCache(),
 });
 

frontend/src/components/Footer.tsx

@@ -1,9 +1,9 @@
 import React from "react";
 
-import Brick from "../assets/brick.svg?react";
 import styles from "./Footer.module.css";
+import Brick from "../assets/brick.svg?react";
 
-export const Footer = (): JSX.Element => {
+export const Footer = (): React.JSX.Element => {
   return (
     <footer className={styles.footer}>
       Made with <span className={styles.heart}>❤</span> by{" "}

frontend/src/components/GQLError.tsx

@@ -1,5 +1,5 @@
-import { ApolloError } from "@apollo/client";
-import React from "react";
+import type { ErrorLike } from "@apollo/client";
+import { CombinedGraphQLErrors } from "@apollo/client/errors";
 
 import styles from "./GQLError.module.css";
 
@@ -11,9 +11,9 @@ const formatModel = (text: string) => {
   return withSpaces.charAt(0).toUpperCase() + withSpaces.slice(1);
 };
 
-export const GQLError = ({ error }: { error: ApolloError }) => {
-  if (error?.graphQLErrors?.length == 1) {
-    const single = error?.graphQLErrors[0];
+export const GQLError = ({ error }: { error: ErrorLike }) => {
+  if (error instanceof CombinedGraphQLErrors && error.errors.length === 1) {
+    const single = error.errors[0];
     if (single?.extensions?.code === "NOT_FOUND") {
       const modelPretty = formatModel(single?.extensions?.model as string);
       return <div className={styles.errorMessage}>{`${modelPretty} not found`}</div>;

frontend/src/components/Header.tsx

@@ -8,7 +8,7 @@ const ADMIN_URL = `${import.meta.env.VITE_API_URL}/admin/`;
 
 const navLinkStyles = ({ isActive }: { isActive: boolean }) => clsx(styles.navLink, { [styles.active]: isActive });
 
-export const Header = (): JSX.Element => {
+export const Header = (): React.JSX.Element => {
   return (
     <header className={styles.header}>
       <nav className={styles.nav}>

frontend/src/components/Splash.tsx

@@ -8,7 +8,7 @@ interface SplashProps {
   noOverlay?: boolean;
 }
 
-const Splash = ({ brandText = "BBS", noOverlay = false }: SplashProps): JSX.Element => (
+const Splash = ({ brandText = "BBS", noOverlay = false }: SplashProps): React.JSX.Element => (
   <div className={clsx(styles.splash, { [styles.overlay]: !noOverlay })}>
     <div className={styles.wrap}>
       <div className={styles.sun}></div>

frontend/src/components/Toast.tsx

@@ -2,9 +2,9 @@ import clsx from "clsx";
 import React from "react";
 
 import styles from "./Toast.module.css";
-import { useToast } from "./ToastProvider";
+import { useToast } from "../hooks/useToast";
 
-export const Toast = (): JSX.Element => {
+export const Toast = (): React.JSX.Element => {
   const { showToast, message, background, visible } = useToast();
 
   const classes = clsx([styles[background], styles.toast], { [styles.visible]: visible });

frontend/src/components/ToastProvider.tsx

@@ -1,35 +1,17 @@
-import React, { ReactNode, useContext, useState } from "react";
+import React, { useState } from "react";
+import type { ReactNode } from "react";
 
-type Background = "primary" | "danger";
-
-interface ToastProps {
-  visible: boolean;
-  message: string;
-  showToast: (message: string, background?: Background) => void;
-  hide: () => void;
-  background: Background;
-}
-
-const defaultState = {
-  // FIXME: revert
-  visible: false,
-  message: "",
-  // eslint-disable-next-line @typescript-eslint/no-empty-function
-  showToast: () => {},
-  // eslint-disable-next-line @typescript-eslint/no-empty-function
-  hide: () => {},
-  background: "primary" as Background,
-};
-
-const ToastContext = React.createContext<ToastProps>(defaultState);
+import { ToastContext, defaultToastState } from "../contexts/ToastContext";
+import type { Background } from "../contexts/ToastContext";
 
 type ToastProviderProps = {
   children: ReactNode;
 };
-export const ToastProvider = ({ children }: ToastProviderProps): JSX.Element => {
-  const [visible, setVisible] = useState(defaultState.visible);
-  const [message, setMessage] = useState(defaultState.message);
-  const [background, setBackground] = useState(defaultState.background);
+
+export const ToastProvider = ({ children }: ToastProviderProps): React.JSX.Element => {
+  const [visible, setVisible] = useState(defaultToastState.visible);
+  const [message, setMessage] = useState(defaultToastState.message);
+  const [background, setBackground] = useState(defaultToastState.background);
 
   const showToast = (newMessage: string, background: Background = "primary") => {
     setMessage(newMessage);
@@ -49,5 +31,3 @@ export const ToastProvider = ({ children }: ToastProviderProps): JSX.Element =>
     <ToastContext.Provider value={{ visible, showToast, message, hide, background }}>{children}</ToastContext.Provider>
   );
 };
-
-export const useToast = (): ToastProps => useContext(ToastContext);

frontend/src/components/Wireframe.tsx

@@ -1,5 +1,3 @@
-import React from "react";
-
 import styles from "./Wireframe.module.css";
 
 export const Wireframe = () => (

frontend/src/contexts/ToastContext.ts

@@ -0,0 +1,22 @@
+import React from "react";
+
+export type Background = "primary" | "danger";
+
+export interface ToastProps {
+  visible: boolean;
+  message: string;
+  showToast: (message: string, background?: Background) => void;
+  hide: () => void;
+  background: Background;
+}
+
+export const defaultToastState: ToastProps = {
+  // FIXME: revert
+  visible: false,
+  message: "",
+  showToast: () => {},
+  hide: () => {},
+  background: "primary",
+};
+
+export const ToastContext = React.createContext<ToastProps>(defaultToastState);

frontend/src/features/auth/UserCreate.tsx

@@ -1,9 +1,8 @@
-import { useMutation } from "@apollo/client";
-import React from "react";
+import { useMutation } from "@apollo/client/react";
 import { SubmitHandler, useForm } from "react-hook-form";
 
-import { CreateUserDocument } from "../../types";
 import styles from "./UserCreate.module.css";
+import { CreateUserDocument } from "../../types";
 
 type FormValues = {
   firstName: string;

frontend/src/features/deposit/Deposit.tsx

@@ -1,10 +1,10 @@
 import React from "react";
 
-import { UserCard } from "../users/UserCard";
 import styles from "./Deposit.module.css";
 import { useDeposit } from "./useDeposit";
+import { UserCard } from "../users/UserCard";
 
-const Deposit = (): JSX.Element => {
+const Deposit = (): React.JSX.Element => {
   const {
     loading,
     selectedUser,

frontend/src/features/deposit/useDeposit.ts

@@ -1,7 +1,7 @@
-import { useMutation, useQuery } from "@apollo/client";
+import { useMutation, useQuery } from "@apollo/client/react";
 import { useState } from "react";
 
-import { useToast } from "../../components/ToastProvider";
+import { useToast } from "../../hooks/useToast";
 import { AllUsersDocument, CreateDepositDocument } from "../../types";
 
 export const useDeposit = () => {
@@ -32,9 +32,9 @@ export const useDeposit = () => {
     }
 
     if (res.data?.createDeposit?.__typename === "CreateDepositSuccess") {
-      const { transaction } = res.data?.createDeposit;
+      const { transaction } = res.data.createDeposit;
       showToast(
-        `${transaction.user.firstName} har satt inn${transaction.amount}. Ny saldo er ${transaction.user.profile?.balance}.`,
+        `${transaction.user.firstName} har satt inn ${transaction.amount}. Ny saldo er ${transaction.user.profile?.balance}.`,
       );
       reset();
       return;

frontend/src/features/inventory/Inventory.tsx

@@ -1,12 +1,12 @@
-import { useQuery } from "@apollo/client";
-import React, { useState } from "react";
+import { useQuery } from "@apollo/client/react";
+import { useState } from "react";
 import { Link } from "react-router-dom";
 
+import styles from "./Inventory.module.css";
 import { GQLError } from "../../components/GQLError";
 import { InventoryPageDocument } from "../../types";
 import { formatCurrency } from "../../utils/currency";
 import { formatTime } from "../../utils/time";
-import styles from "./Inventory.module.css";
 
 const PAGE_SIZE = 20;
 

frontend/src/features/inventory/InventoryAdd.tsx

@@ -1,11 +1,11 @@
-import { useMutation, useQuery } from "@apollo/client";
+import { useMutation, useQuery } from "@apollo/client/react";
 import React, { useState } from "react";
 import { Link, useNavigate } from "react-router-dom";
 
-import { GQLError } from "../../components/GQLError";
-import { useToast } from "../../components/ToastProvider";
-import { CreateInventoryTransactionDocument, InventoryProductsDocument } from "../../types";
 import styles from "./Inventory.module.css";
+import { GQLError } from "../../components/GQLError";
+import { useToast } from "../../hooks/useToast";
+import { CreateInventoryTransactionDocument, InventoryProductsDocument } from "../../types";
 
 const InventoryAdd = () => {
   const navigate = useNavigate();

frontend/src/features/inventory/InventoryReport.tsx

@@ -1,11 +1,11 @@
-import { useQuery } from "@apollo/client";
+import { useQuery } from "@apollo/client/react";
 import { format, subDays } from "date-fns";
 import React, { useState } from "react";
 
+import styles from "./Inventory.module.css";
 import { GQLError } from "../../components/GQLError";
 import { InventoryReportDocument } from "../../types";
 import { formatCurrency } from "../../utils/currency";
-import styles from "./Inventory.module.css";
 
 const today = () => format(new Date(), "yyyy-MM-dd");
 const monthAgo = () => format(subDays(new Date(), 30), "yyyy-MM-dd");

frontend/src/features/log/Log.tsx

@@ -1,11 +1,10 @@
-import { useQuery } from "@apollo/client";
+import { useQuery } from "@apollo/client/react";
 import clsx from "clsx";
-import React from "react";
 import { useUrlSearchParams } from "use-url-search-params";
 
+import styles from "./Log.module.css";
 import { OrderListDocument, TransactionListDocument } from "../../types";
 import { formatTime } from "../../utils/time";
-import styles from "./Log.module.css";
 
 const PAGE_SIZE = 10;
 

frontend/src/features/register/ProductCard.tsx

@@ -1,8 +1,8 @@
 import clsx from "clsx";
 import React, { MouseEventHandler } from "react";
 
-import { AllProductsQuery } from "../../types";
 import styles from "./ProductCard.module.css";
+import { AllProductsQuery } from "../../types";
 
 type ProductCardProps = {
   product: AllProductsQuery["allProducts"][number];
@@ -11,7 +11,7 @@ type ProductCardProps = {
   amount: number;
 };
 
-export const ProductCard = ({ product, onProduct, amount, active = false }: ProductCardProps): JSX.Element => {
+export const ProductCard = ({ product, onProduct, amount, active = false }: ProductCardProps): React.JSX.Element => {
   const classes = clsx(styles.product, { [styles.active]: active });
   return (
     <button className={classes} type="button" onClick={onProduct} title={product.name}>

frontend/src/features/register/Register.tsx

@@ -1,14 +1,14 @@
 import React from "react";
 
-import { AllProductsQuery, OrderLineInput } from "../../types";
-import { UserCard } from "../users/UserCard";
 import { ProductCard } from "./ProductCard";
 import styles from "./Register.module.css";
 import { useRegister } from "./useRegister";
+import { AllProductsQuery, OrderLineInput } from "../../types";
+import { UserCard } from "../users/UserCard";
 
 const USER_EXTERNAL = "external";
 
-const Register = (): JSX.Element => {
+const Register = (): React.JSX.Element => {
   const {
     users,
     products,

frontend/src/features/register/useRegister.ts

@@ -1,7 +1,7 @@
-import { useMutation, useQuery } from "@apollo/client";
+import { useMutation, useQuery } from "@apollo/client/react";
 import { useState } from "react";
 
-import { useToast } from "../../components/ToastProvider";
+import { useToast } from "../../hooks/useToast";
 import {
   AllProductsDocument,
   AllProductsQuery,

frontend/src/features/stats/OrderStats.tsx

@@ -1,11 +1,10 @@
-import { useQuery } from "@apollo/client";
+import { useQuery } from "@apollo/client/react";
 import { BarDatum, ResponsiveBar } from "@nivo/bar";
-import React from "react";
 
-import { OrderStatsDocument, SchemaOrderStatsByTime } from "../../types";
 import styles from "./Stats.module.css";
 import { StatsView } from "./StatsView";
 import { chartTheme } from "./chartTheme";
+import { OrderStatsDocument, SchemaOrderStatsByTime } from "../../types";
 
 const days = { 1: "Mandag", 2: "Tirsdag", 3: "Onsdag", 4: "Torsdag", 5: "Fredag", 6: "Lørdag", 7: "Søndag" };
 

frontend/src/features/stats/ProductStats.tsx

@@ -1,11 +1,10 @@
-import { useQuery } from "@apollo/client";
+import { useQuery } from "@apollo/client/react";
 import { ResponsivePie } from "@nivo/pie";
-import React from "react";
 
-import { AllProductStatsDocument } from "../../types";
 import styles from "./Stats.module.css";
 import { StatsView } from "./StatsView";
 import { chartTheme } from "./chartTheme";
+import { AllProductStatsDocument } from "../../types";
 
 type UserCount = {
   name: string;

frontend/src/features/stats/Stats.tsx

@@ -1,11 +1,10 @@
-import { useQuery } from "@apollo/client";
+import { useQuery } from "@apollo/client/react";
 import { ResponsiveLine } from "@nivo/line";
-import React from "react";
 
-import { ProductStatsDocument } from "../../types";
 import styles from "./Stats.module.css";
 import { StatsView } from "./StatsView";
 import { chartTheme, chartTooltipStyle } from "./chartTheme";
+import { ProductStatsDocument } from "../../types";
 
 const Stats = () => {
   const { data, loading } = useQuery(ProductStatsDocument);

frontend/src/features/stats/UserStats.tsx

@@ -1,12 +1,11 @@
-import { useQuery } from "@apollo/client";
+import { useQuery } from "@apollo/client/react";
 import { ResponsiveBar } from "@nivo/bar";
-import React from "react";
 
-import { GQLError } from "../../components/GQLError";
-import { UserStatsDocument } from "../../types";
 import styles from "./Stats.module.css";
 import { StatsView } from "./StatsView";
 import { chartTheme } from "./chartTheme";
+import { GQLError } from "../../components/GQLError";
+import { UserStatsDocument } from "../../types";
 
 const UserStats = () => {
   const { data, loading, error } = useQuery(UserStatsDocument);

frontend/src/features/users/UserCard.tsx

@@ -1,9 +1,9 @@
 import clsx from "clsx";
 import React, { MouseEventHandler } from "react";
 
+import styles from "./UserCard.module.css";
 import { AllUsersQuery } from "../../types";
 import { formatCurrency } from "../../utils/currency";
-import styles from "./UserCard.module.css";
 
 type UserCardProps = {
   user: AllUsersQuery["allUsers"][0] | null;
@@ -12,7 +12,7 @@ type UserCardProps = {
 };
 
 /** If user is null, then it's the special external user */
-export const UserCard = ({ user, onUser, active = false }: UserCardProps): JSX.Element => {
+export const UserCard = ({ user, onUser, active = false }: UserCardProps): React.JSX.Element => {
   const classes = clsx(styles.user, { [styles.active]: active });
   const userBalanceString = formatCurrency(Number(user?.profile?.balance));
   return (

frontend/src/features/users/UserDetail.tsx

@@ -1,13 +1,12 @@
-import { useQuery } from "@apollo/client";
+import { useQuery } from "@apollo/client/react";
 import { ResponsiveLine } from "@nivo/line";
-import React from "react";
 import { useParams } from "react-router-dom";
 
+import styles from "./UserDetail.module.css";
 import { GQLError } from "../../components/GQLError";
 import { SchemaUser as User, UserDetailDocument, SchemaUserProfile as UserProfile } from "../../types";
 import { formatMonth, formatTime } from "../../utils/time";
 import { chartTheme, chartTooltipStyle } from "../stats/chartTheme";
-import styles from "./UserDetail.module.css";
 
 const UserDetail = () => {
   const { userId } = useParams();

frontend/src/features/users/UserList.tsx

@@ -1,5 +1,5 @@
-import { useQuery } from "@apollo/client";
-import React, { useState } from "react";
+import { useQuery } from "@apollo/client/react";
+import { useState } from "react";
 import { Link } from "react-router-dom";
 
 import { AllUsersDocument } from "../../types";

frontend/src/hooks.ts

@@ -1,21 +0,0 @@
-import { useCallback, useEffect, useRef } from "react";
-
-export function usePrevious<T>(value: T) {
-  // The ref object is a generic container whose current property is mutable ...
-  // ... and can hold any value, similar to an instance property on a class
-  const ref = useRef<T | undefined>(undefined);
-
-  // Store current value in ref
-  useEffect(() => {
-    ref.current = value;
-  }, [value]); // Only re-run if value changes
-  // Return previous value (happens before update in useEffect above)
-  return ref.current;
-}
-
-export function useToast() {
-  const show = useCallback(() => {
-    console.log("showing toast with element from root");
-  }, []);
-  return { show };
-}

frontend/src/hooks/useToast.ts

@@ -0,0 +1,5 @@
+import { useContext } from "react";
+
+import { ToastContext } from "../contexts/ToastContext";
+
+export const useToast = () => useContext(ToastContext);

frontend/src/main.tsx

@@ -1,13 +1,12 @@
 import React from "react";
-import ReactDOM from "react-dom";
+import { createRoot } from "react-dom/client";
 
 import App from "./App";
 
 import "./global.css";
 
-ReactDOM.render(
+createRoot(document.getElementById("root")!).render(
   <React.StrictMode>
     <App />
   </React.StrictMode>,
-  document.getElementById("root"),
 );

frontend/stylelint.config.js

@@ -1,9 +0,0 @@
-module.exports = {
-  extends: ["stylelint-config-recommended", "stylelint-prettier/recommended", "stylelint-config-idiomatic-order"],
-  plugins: ["stylelint-order"],
-  rules: {
-    // Useful?
-    "no-descending-specificity": null,
-  },
-  ignoreFiles: ["**/*.md", "**/*.svg", "**/*.jpg", "**/*.graphql", "**/*.tsx", "**/*.ts"],
-};

frontend/tsconfig.app.json

@@ -0,0 +1,24 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023", "DOM", "DOM.Iterable"],
+    "module": "esnext",
+    "types": ["vite/client"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+
+    /* Strictness */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["src"]
+}

frontend/tsconfig.json

@@ -1,27 +1,7 @@
 {
-  "compilerOptions": {
-    "target": "ES2021",
-    "useDefineForClassFields": true,
-    "lib": [
-      "DOM",
-      "DOM.Iterable",
-      "ES2021"
-    ],
-    "allowJs": false,
-    "skipLibCheck": true,
-    "esModuleInterop": false,
-    "allowSyntheticDefaultImports": true,
-    "strict": true,
-    "forceConsistentCasingInFileNames": true,
-    "module": "ES2020",
-    "moduleResolution": "Node",
-    "resolveJsonModule": true,
-    "isolatedModules": true,
-    "noEmit": true,
-    "jsx": "react-jsx",
-  },
-  "include": [
-    "./src",
-    "node_modules/vite/types/importMeta.d.ts"
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
   ]
-}
+}

frontend/tsconfig.node.json

@@ -0,0 +1,24 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "esnext",
+    "types": ["node"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Strictness */
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["vite.config.ts"]
+}

frontend/vite.config.ts

@@ -1,10 +1,11 @@
-/* eslint-disable import/no-extraneous-dependencies */
 import { defineConfig } from "vite";
+import react, { reactCompilerPreset } from "@vitejs/plugin-react";
+import babel from "@rolldown/plugin-babel";
 import svgr from "vite-plugin-svgr";
 
 // https://vitejs.dev/config/
 export default defineConfig({
-  plugins: [svgr()],
+  plugins: [react(), babel({ presets: [reactCompilerPreset()] }), svgr()],
   define: {
     __DEV__: process.env.NODE_ENV !== "production",
   },

mise.toml

@@ -1,5 +1,5 @@
 [tools]
-node = "20"
+node = "26"
 prek = "latest"
 python = "3.14"
 uv = "latest"