Migrate tests to Vitest

package.json

@@ -39,7 +39,8 @@
     "download-language-names": "node scripts/download-language-names.js",
     "change-password": "node scripts/change-password.js",
     "postbuild": "node scripts/postbuild.js",
-    "test": "jest",
+    "test": "vitest run",
+    "test:watch": "vitest",
     "cypress-open": "cypress open cypress run",
     "cypress-run": "cypress run cypress run",
     "seed-data": "tsx scripts/seed-data.ts",
@@ -126,7 +127,9 @@
     "@rollup/plugin-replace": "^5.0.2",
     "@rollup/plugin-terser": "^0.4.4",
     "@rollup/plugin-typescript": "^12.3.0",
-    "@types/jest": "^30.0.0",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
     "@types/node": "^24.12.0",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.2",
@@ -134,7 +137,7 @@
     "cross-env": "^10.1.0",
     "cypress": "^13.6.6",
     "dotenv-cli": "^11.0.0",
-    "jest": "^29.7.0",
+    "jsdom": "^29.1.1",
     "postcss": "^8.5.10",
     "postcss-flexbugs-fixes": "^5.0.2",
     "postcss-import": "^15.1.0",
@@ -148,11 +151,11 @@
     "rollup-plugin-peer-deps-external": "^2.2.4",
     "rollup-plugin-postcss": "^4.0.2",
     "tar": "^7.5.13",
-    "ts-jest": "^29.4.6",
     "ts-morph": "^27.0.2",
     "ts-node": "^10.9.1",
     "tsup": "^8.5.0",
     "tsx": "^4.19.0",
-    "typescript": "^5.9.3"
+    "typescript": "^5.9.3",
+    "vitest": "^4.1.6"
   }
 }