fix: downgrade para Next.js 15 (estável com middleware)

frontend/package.json

@@ -18,12 +18,12 @@
     "date-fns": "^4.1.0",
     "jsonwebtoken": "^9.0.2",
     "minio": "^8.0.6",
-    "next": "16.0.4",
+    "next": "15.1.0",
     "next-themes": "^0.4.6",
     "pg": "^8.16.3",
     "prisma": "^5.22.0",
-    "react": "19.2.0",
-    "react-dom": "19.2.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
     "remixicon": "^4.7.0",
     "uuid": "^13.0.0"
   },
@@ -32,11 +32,11 @@
     "@types/bcryptjs": "^2.4.6",
     "@types/jsonwebtoken": "^9.0.10",
     "@types/node": "^20",
-    "@types/react": "^19",
-    "@types/react-dom": "^19",
+    "@types/react": "^18",
+    "@types/react-dom": "^18",
     "@types/uuid": "^10.0.0",
     "eslint": "^9",
-    "eslint-config-next": "16.0.4",
+    "eslint-config-next": "15.1.0",
     "tailwindcss": "^4",
     "ts-node": "^10.9.2",
     "typescript": "^5"