refactor: remove dead code

frontend/package.json

@@ -19,7 +19,6 @@
     "axios": "^1.16.1",
     "clsx": "^2.1.1",
     "date-fns": "^4.2.1",
-    "jose": "^6.2.3",
     "qrcode": "^1.5.4",
     "runed": "^0.37.1",
     "sveltekit-superforms": "^2.30.1",
@@ -35,7 +34,6 @@
     "@sveltejs/adapter-static": "^3.0.10",
     "@sveltejs/kit": "^2.60.1",
     "@sveltejs/vite-plugin-svelte": "^7.1.2",
-    "@types/eslint": "^9.6.1",
     "@types/node": "^25.9.0",
     "@types/qrcode": "^1.5.6",
     "bits-ui": "^2.18.1",
@@ -48,7 +46,6 @@
     "prettier": "^3.8.3",
     "prettier-plugin-svelte": "^3.5.2",
     "prettier-plugin-tailwindcss": "^0.8.0",
-    "rollup": "^4.60.4",
     "shadcn-svelte": "^1.3.0",
     "svelte": "^5.55.8",
     "svelte-check": "^4.4.8",