Build blog detail page

[replakcan]

Description

Create the blog detail page that renders individual blog posts.

Scope

• Create /blog/[slug] route
• Render MDX/Markdown content
• Generate static params for all published posts
• Show title, date, tags, and content
• Add basic typography for readability

Out of Scope

• Comments
• Related posts
• Search
• Tag pages
• Advanced code highlighting

Acceptance Criteria

• /blog/[slug] route exists
• Published blog posts render correctly
• Static params are generated for all published posts
• Blog title is displayed
• Blog date is displayed
• Blog tags are displayed
• Blog content is readable
• Invalid slug behavior is handled
• npm run build succeeds
• Static export compatibility is preserved

Technical Notes

• Dynamic routes must be generated at build time.
• Do not use runtime server fetching.
• Do not add API routes.

Related

• Depends on: Define blog content format
• Depends on: Build blog listing page