fix: pin nuxt to 3.15.4 and recreate lockfile

package.json

@@ -29,7 +29,7 @@
     "jdenticon": "^3.3.0",
     "micromark": "^4.0.1",
     "moment": "^2.30.1",
-    "nuxt": "^3.13.2",
+    "nuxt": "3.15.4",
     "nuxt-security": "2.2.0",
     "prisma": "^6.1.0",
     "sanitize-filename": "^1.6.3",
@@ -51,7 +51,6 @@
     "@types/uuid": "^10.0.0",
     "autoprefixer": "^10.4.20",
     "h3": "^1.13.0",
-    "nitropack": "2.11.6",
     "postcss": "^8.4.47",
     "sass": "^1.79.4",
     "tailwindcss": "^4.0.0"