fix(seo): align breadcrumb and schema URLs with canonical trailing slashes

[lwalden]

Summary

• Fixed 6 breadcrumb JSON-LD URLs that were missing trailing slashes (e.g. https://lwalden.dev/posts instead of https://lwalden.dev/posts/), causing a mismatch with canonical tags and sitemap URLs which all use trailing slashes
• Fixed Organization and Person schema url fields to include trailing slash, matching the homepage canonical (https://lwalden.dev/)
• 7 files changed, all edits are URL string fixes in frontmatter/TypeScript — no HTML or accessibility changes

Context

Google sees three URL signals per page: canonical tag, sitemap entry, and structured data URLs. When these disagree on trailing slashes, Google's confidence in the canonical URL drops, which can delay or prevent proper indexing. This aligns all three signals to use trailing slashes consistently.

Files changed

File	Fix
src/lib/schemas.ts	Organization + Person schema URLs: added trailing /
src/pages/about.astro	Breadcrumb URL: /about -> /about/
src/pages/posts/index.astro	Breadcrumb URL: /posts -> /posts/
src/pages/posts/[...slug]/index.astro	Breadcrumb URL: /posts -> /posts/
src/pages/posts/tag/[tag]/index.astro	Breadcrumb URL: /posts -> /posts/
src/pages/projects.astro	Breadcrumb URL: /projects -> /projects/
src/pages/projects/[slug]/index.astro	Breadcrumb URL: /projects -> /projects/

Test plan

• Verify deployed site breadcrumb JSON-LD matches canonical URLs (all with trailing slashes)
• Verify Organization schema URL is https://lwalden.dev/
• Verify Person schema URL is https://lwalden.dev/
• Run Google Rich Results Test on a blog post to confirm valid structured data

🤖 Generated with Claude Code