Add @types/node as explicit devDependency

`@angular-devkit/build-angular` previously provided `@types/node`
transitively; its removal broke `ng test` in CI, as ts-node compiles
`esbuild/plugins.ts` with the `node` types forced.

frontend/package-lock.json

@@ -146,6 +146,7 @@
         "@types/jquery-migrate": "^3.3.3",
         "@types/lodash": "^4.17.24",
         "@types/mousetrap": "^1.6.3",
+        "@types/node": "^22.19.20",
         "@types/pako": "^2.0.4",
         "@types/rails__request.js": "^0.0.1",
         "@types/react": "^19.2.15",
@@ -7482,6 +7483,16 @@
       "integrity": "sha512-qL0hyIMNPow317QWW/63RvL1x5MVMV+Ru3NaY9f/CuEpCqrmb7WeuK2071ZY5hczOnm38qExWM2i2WtkXLSqFw==",
       "dev": true
     },
+    "node_modules/@types/node": {
+      "version": "22.19.20",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.20.tgz",
+      "integrity": "sha512-6tELRwSDYWW9EdZhbeZmYGZ1/7Djkt+Ah3/ScEYT9cDord7UJzasR/4D3VONg9tQI5CDp+/CZC1AXj2pCFOvpw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
     "node_modules/@types/pako": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/@types/pako/-/pako-2.0.4.tgz",
@@ -17625,6 +17636,13 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/union": {
       "version": "0.5.0",
       "resolved": "https://registry.npmjs.org/union/-/union-0.5.0.tgz",

frontend/package.json

@@ -24,6 +24,7 @@
     "@types/jquery-migrate": "^3.3.3",
     "@types/lodash": "^4.17.24",
     "@types/mousetrap": "^1.6.3",
+    "@types/node": "^22.19.20",
     "@types/pako": "^2.0.4",
     "@types/rails__request.js": "^0.0.1",
     "@types/react": "^19.2.15",