Add TypeScript so Jenkins typecheck uses the real tsc, not the dummy npx package.

package-lock.json

@@ -7,15 +7,17 @@
     "": {
       "name": "mytestui",
       "version": "1.0.0",
+      "hasInstallScript": true,
       "license": "ISC",
       "devDependencies": {
         "@playwright/test": "^1.55.0",
         "@types/node": "^22.15.0",
         "allure-commandline": "^2.43.0",
-        "allure-playwright": "^3.10.2"
+        "allure-playwright": "^3.10.2",
+        "typescript": "^5.9.3"
       },
       "engines": {
-        "node": ">=18"
+        "node": ">=20"
       }
     },
     "node_modules/@playwright/test": {
@@ -171,6 +173,20 @@
         "node": ">=20"
       }
     },
+    "node_modules/typescript": {
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
     "node_modules/undici-types": {
       "version": "6.21.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",

package.json

@@ -10,7 +10,7 @@
     "test:ui": "playwright test --ui",
     "test:headed": "playwright test --headed",
     "test:debug": "playwright test --debug",
-    "typecheck": "npx tsc --noEmit",
+    "typecheck": "tsc --noEmit",
     "test:ci": "node scripts/run-ci.mjs",
     "test:ci:smoke": "node scripts/run-ci.mjs --suite=smoke",
     "test:ci:nightly": "node scripts/run-ci.mjs --suite=nightly",
@@ -242,6 +242,7 @@
     "@playwright/test": "^1.55.0",
     "@types/node": "^22.15.0",
     "allure-commandline": "^2.43.0",
-    "allure-playwright": "^3.10.2"
+    "allure-playwright": "^3.10.2",
+    "typescript": "^5.9.3"
   }
 }