Migrate from Cypress to Playwright

package.json

@@ -46,6 +46,7 @@
     "@formatjs/fast-memoize": "^2.2.6",
     "@formatjs/intl": "^2.10.15",
     "@jest/globals": "^29.7.0",
+    "@playwright/test": "^1.59.1",
     "@types/adm-zip": "^0.5.0",
     "@types/array.prototype.flatmap": "^1.2.2",
     "@types/d3-array": "^3.2.1",
@@ -60,12 +61,12 @@
     "@types/js-cookie": "^3.0.6",
     "@types/lunr": "^2.3.3",
     "@types/md5": "^2.3.0",
+    "@types/node": "^25.6.0",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.0",
     "@typescript-eslint/eslint-plugin": "^5.62.0",
     "@typescript-eslint/parser": "^5.62.0",
     "@vitejs/plugin-react": "^4.3.4",
-    "cypress": "^13.17.0",
     "eslint": "^7.32.0",
     "eslint-plugin-react": "^7.37.5",
     "eslint-plugin-react-hooks": "^7.1.1",
@@ -75,7 +76,6 @@
     "prettier": "^3.8.3",
     "prettier-plugin-organize-imports": "^4.1.0",
     "run-script-os": "^1.1.6",
-    "start-server-and-test": "^2.0.9",
     "ts-jest": "^29.2.5",
     "ts-node": "^10.9.2",
     "typescript": "^5.7.3",
@@ -86,16 +86,15 @@
     "start": "vite",
     "build": "tsc && vite build",
     "test": "jest",
-    "prettier": "prettier --write \"src/**/*.{ts,tsx,json}\"",
-    "lint": "eslint src --ext .ts,.tsx",
+    "prettier": "prettier --write \"{src,tests}/**/*.{ts,tsx,json}\"",
+    "lint": "eslint src tests --ext .ts,.tsx",
     "predeploy": "npm run build",
     "deploy": "gh-pages -d dist",
     "predeploy-wikitree": "npm run build",
     "deploy-wikitree": "./deploy-wikitree.sh",
-    "cy:run": "cypress run",
-    "cy:start-and-run": "run-script-os",
-    "cy:start-and-run:default": "BROWSER=none start-server-and-test start localhost:3000 cy:run",
-    "cy:start-and-run:windows": "set BROWSER=none && start-server-and-test start localhost:3000 cy:run"
+    "preview": "vite preview",
+    "test:e2e": "playwright test",
+    "test:e2e:ui": "playwright test --ui"
   },
   "homepage": ".",
   "browserslist": [