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)

.gitignore

@@ -61,6 +61,9 @@ web/dist/
 web/frontend/.env
 web/frontend/.env.local
 web/frontend/coverage/
+web/frontend/*.tsbuildinfo
+web/frontend/vite.config.js
+web/frontend/vite.config.d.ts
 
 # Build artifacts
 *.tmp