Add package-lock.json and fix TypeScript build errors

- web/frontend/package.json: remove invalid @nuxtjs/tailwindcss (Nuxt-only package)
- web/frontend/src/router/index.ts: prefix unused 'from' param with _
- web/frontend/src/views/ApiKeys.vue: remove unused 'Check' import
- .gitignore: add *.tsbuildinfo, vite.config.js, vite.config.d.ts
- web/frontend/package-lock.json: generated via npm install (required for CI npm ci)

web/frontend/package.json

@@ -28,7 +28,6 @@
     "tailwindcss": "^3.4.0",
     "autoprefixer": "^10.4.0",
     "postcss": "^8.4.0",
-    "@nuxtjs/tailwindcss": "^8.0.0",
     "@types/node": "^22.0.0",
     "eslint": "^9.0.0",
     "@typescript-eslint/eslint-plugin": "^8.0.0",