ENG-2224 Set metadataBase and absolute canonical URLs

[mdroidian]

Configures the production metadataBase and adds explicit absolute canonical URLs across the public website route inventory, including dynamic blog and docs routes. Validation: pnpm install --frozen-lockfile and pnpm ci:validate passed. Separate delegated review returned no findings.

[linear-code]

ENG-2224

[supabase]

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[vercel]

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Project	Deployment	Actions	Updated
discourse-graph	Ready	Preview	Sep 7, 2026 4:22am UTC

[graphite-app]

PR size/scope check

This PR is over our review-size guideline.

• Recommended: ~200 lines changed
• Acceptable limit: up to 400 lines when well-scoped/self-contained
• Preferred file count: fewer than 5 files

Please split this into smaller PRs unless there is a clear reason the changes need to land together.

If keeping it as one PR, please add a brief justification covering:

• What single problem this PR solves
• Why the files/changes are coupled

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-07T04:24:03.400502Z	4edebb5	New commits

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[chatgpt-codex-connector]

💡 Codex Review

discourse-graph/apps/website/vitest.unit.config.mts

Line 7 in 10984fd

include: ["app/**/*.test.{ts,tsx}", "test/unit/**/*.test.{ts,tsx}"],

Include the existing search-index unit tests

When the root pnpm ci:validate command invokes this new website test task, the explicit include patterns run only app/seo.test.ts and exclude scripts/build-docs-search-index.test.mjs. Consequently, the existing four regression tests for canonical docs routes, search text extraction, platform filters, and build configuration remain absent from CI; include that test or invoke node --test from test:unit.

AGENTS.md reference: AGENTS.md:L97-L97

ℹ️ About Codex in GitHub

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• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[mdroidian]

The search-index test finding is addressed by a46c452 in #1406 and included in this rebased branch. The website test:unit command now runs all four existing Node search-index tests before Vitest. Frozen install, ci:validate, and GitHub checks passed. This is a general PR comment rather than a resolvable review thread.