Update Plan

PUT /api/v1/projects/{slug}/plans/{planId}

curl -X PUT https://cuprice.io/api/v1/projects/my-saas-app/plans/201 \
  -H "Authorization: Bearer cpk_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Pro Plus",
    "basePrice": 39,
    "isPopular": true,
    "freemiumDay": 14,
    "isPerUserPricing": true,
    "perUserMultiplier": 8
  }'

{
  "id": 201,
  "name": "Pro Plus",
  "description": "For growing teams",
  "basePrice": 39,
  "isPopular": true,
  "isVisible": true,
  "isFree": false,
  "freemiumDay": 14,
  "isPerUserPricing": true,
  "perUserMultiplier": 8,
  "planFeatures": [
    {
      "id": 301,
      "multiplier": 5,
      "feature": {
        "id": 101,
        "name": "AI Prompts",
        "featureType": "Limits",
        "basePrice": 10
      }
    },
    {
      "id": 302,
      "multiplier": 1,
      "feature": {
        "id": 102,
        "name": "Team Members",
        "featureType": "Standart",
        "basePrice": 5
      }
    }
  ],
  "createdAt": "2025-10-05T12:00:00.000Z",
  "updatedAt": "2025-12-10T09:30:00.000Z"
}