Create Post

{
  "title": "Golden hour in Tokyo",
  "caption": "Shot on Classic Chrome with the X-T5",
  "cameraModel": "X-T5",
  "filmSimulation": "Classic Chrome",
  "recipeId": "uuid (optional)",
  "tags": ["street", "golden-hour", "tokyo"],
  "images": [
    { "imageUrl": "https://...", "isCover": true, "order": 1 },
    { "imageUrl": "https://...", "isCover": false, "order": 2 }
  ],
  "taggedUserIds": ["uuid1", "uuid2"]
}

{
  "message": "Post created successfully",
  "post": {
    "id": "uuid",
    ...
  }
}