API: getting one blog does not accept ?body=html, but getting all blogs does

[MeowcaTheoRange]

Describe the bug

When using the WriteFreely API to get all of a blog's posts, you can pass the parameter ?body=html to get HTML-formatted blog bodies.
/api/collections/test/posts?body=html

{
  "code": 200,
  "data": {
    "alias": "test",
    "title": "Test Blog",
    "description": "Hello, world!",
    "style_sheet": "",
    "public": true,
    "format": "blog",
    "views": 0,
    "url": "https://example.com/test/",
    "verification_link": "",
    "total_posts": 1,
    "posts": [
      {
        "id": "34hr3jrjjt",
        "slug": "test",
        "appearance": "norm",
        "language": "en",
        "rtl": false,
        "created": "2023-08-23T00:00:00-05:00",
        "updated": "2023-10-11T21:06:45-05:00",
        "title": "Test",
        "body": "<h1>This is a test.</h1>\n<a href="https://example.com/">Hello, world!</a>",
        "tags": [],
        "paid": false,
        "views": 1
      }
    ],
    "Format": null
  }
}

However, when getting one of a blog's posts, this parameter is no longer accepted and the body becomes Markdown.
/api/collections/test/posts/test?body=html

{
  "code": 200,
  "data": {
    "id": "34hr3jrjjt",
    "slug": "test",
    "appearance": "norm",
    "language": "en",
    "rtl": false,
    "created": "2023-08-23T00:00:00-05:00",
    "updated": "2023-10-11T21:06:45-05:00",
    "title": "Test",
    "body": "# This is a test.\n[Hello, world!](https://example.com/)",
    "tags": [],
    "paid": false,
    "views": 1
  }
}

Expected behavior

The API should accept the ?body=html parameter on both routes, so blogs can be returned in HTML, regardless of the method.

Application configuration

• Single mode or Multi-user mode?: Multiple users
• Database?: mysql
• Open registration?: Invite-only
• Federation enabled?: yes

Version or last commit: WriteFreely v0.14.0 on Ubuntu 22.04.3 LTS x86_64

[thebaer]

This is definitely something we can support in the API -- thanks for reporting it!