feat(blog): recreate article footer navigation and related posts

- add reusable live-site-faithful blog footer component
- extract previous, next, and related post data from article content
- remove duplicated footer fragments from multilingual articles
- document the repeatable footer extraction workflow

www/src/content/blog/en/parents-guide-to-autism-and-aba.mdx

@@ -236,21 +236,3 @@ Self-care does not have to be elaborate. It may mean lowering one unrealistic ex
 Supporting a child with autism is not about finding one perfect strategy. It is about learning how your child communicates, what helps them regulate, and how to build success into ordinary moments. Start with what matters most in your family right now, then build from there.
 
 If you want help thinking through assessment, therapy options, or next steps, AIA’s [Client Consultation Form](../client-consultation) is the clearest next step.
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- Previous Post 
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-###### [Building Communication & Social Skills in Autistic Children: A Practical Guide for Families](communication-social-skills-autistic-children-guide)
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-### Similar Blog Posts
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-#### [Why Emotional Regulation Should Be the Heart of Every ABA Program](emotional-regulation-aba)
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