feat(seo): emit Organization, WebSite, and BreadcrumbList JSON-LD on every docs page

[Mlaz-code]

Summary

Pre-this-change, every page on docs.sharpapi.io emitted zero structured data (Nextra doesn't ship any by default). sharpapi.io already has rich JSON-LD on every page; the docs were the gap.

Added a server-rendered StructuredData component wired into the layout + MDX page route so every page now emits:

Schema	Scope	Source
Organization	Sitewide	Hardcoded — points to sharpapi.io as parent
WebSite	Sitewide	Hardcoded — docs-scoped
BreadcrumbList	Per-page	Derived from URL + MDX frontmatter title

Example rendered on /en/api-reference/odds

{
  "@type": "BreadcrumbList",
  "itemListElement": [
    { "position": 1, "name": "Docs",          "item": "https://docs.sharpapi.io/en" },
    { "position": 2, "name": "Api Reference", "item": "https://docs.sharpapi.io/en/api-reference" },
    { "position": 3, "name": "Odds Snapshot", "item": "https://docs.sharpapi.io/en/api-reference/odds" }
  ]
}

The leaf position uses the MDX frontmatter title when available, falling back to a title-cased slug.

Why this matters

Today's URL Inspection showed 25 /en/* docs pages in "Discovered — not indexed". Part of that is the 307→308 redirect migration (already fixed in PR #188); the other part is that Google has no explicit hierarchical signal for how these pages connect. BreadcrumbList JSON-LD gives Google that signal directly, and enables rich breadcrumb snippets in SERPs.

Test plan

• next build succeeds with all 44 /en/* pages
• grep -c 'application/ld+json' out/en/quickstart.html → 3
• Breadcrumb leaf uses frontmatter title (verified on odds.mdx → "Odds Snapshot")
• After deploy, paste https://docs.sharpapi.io/en/quickstart into Google's Rich Results Test — should show Organization, WebSite, BreadcrumbList

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
docs.sharpapi.io	Ready	Preview, Comment	Apr 17, 2026 5:38pm