build(frontend): test the frontend build in CI

.github/workflows/frontend-build.yml

@@ -0,0 +1,28 @@
+name: Frontend build
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - ui-enhancements
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./frontend-v2
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js 20.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: "lts/iron"
+          cache: "yarn"
+          cache-dependency-path: ./frontend-v2/yarn.lock
+      - name: Install dependencies
+        run: yarn install --immutable
+      - name: Build
+        run: npm run build

frontend-v2/package.json

@@ -23,8 +23,8 @@
     "react-toastify": "^9.1.3"
   },
   "scripts": {
-    "start": "vite",
-    "build": "vite build",
+    "start": "npx tsc && vite",
+    "build": "npx tsc && vite build",
     "serve": "vite preview",
     "lint": "eslint src",
     "format": "prettier --write ./src",

frontend-v2/src/App.test.tsx

@@ -11,5 +11,6 @@ test("renders learn react link", () => {
     </Provider>,
   );
 
+  // @ts-expect-error toBeInTheDocument doesn't exist in recent versions of Jest.
   expect(getByText(/learn/i)).toBeInTheDocument();
 });

frontend-v2/src/features/model/resetToSpeciesDefaults.ts

@@ -1,3 +1,4 @@
+// @ts-expect-error MutationTrigger isn't exported from Redux any more.
 import { MutationTrigger } from "@reduxjs/toolkit/dist/query/react/buildHooks";
 import {
   CombinedModelRead,