SOP-04：更新貼文內容

# 原始：SOP-04: 修改文章內容
osop_version: '1.0'
id: sop-04-update-post
name: "SOP-04：更新貼文內容"
description: "更新既有貼文的標題、內容、標籤或封面圖片。"
version: 1.0.0
tags:
- api
- sop
- medirank
- posts
nodes:
- id: step_1
  type: api
  subtype: rest
  name: GET /posts/{post_id}
  description: Fetch current post content to confirm it exists before updating.
  runtime:
    method: GET
    url: https://medi-rank.com/api/v1
    endpoint: /posts/{post_id}
    headers:
      Authorization: Bearer ${secrets.TOKEN}
- id: step_2
  type: api
  subtype: rest
  name: PUT /posts/{post_id}
  description: Update post title, content, tags, or cover image. Only changed fields required.
  runtime:
    method: PUT
    url: https://medi-rank.com/api/v1
    endpoint: /posts/{post_id}
    headers:
      Authorization: Bearer ${secrets.TOKEN}
    content_type: multipart/form-data
    body:
      title: New Title
      content: <p>New content</p>
      tags[]:
      - new-tag
      image: (file)
edges:
- from: step_1
  to: step_2
  mode: sequential