sweep(deadcode): remove orphaned preview/[prNumber].astro page

[KooshaPari]

User description

Summary

Remove orphaned /preview/[prNumber] Astro microfrontend page that has zero references in the codebase.

Context

The /preview microfrontend was designed to redirect to Vercel preview deploys for open PRs, but it was never wired into site navigation or referenced by any import, link, or route configuration. After a thorough scan of all .astro, .ts, .js, .md, and config files, zero references were found beyond the file itself.

This is part of epic_A hygiene garden & branch slim — removing dead code to reduce build surface and cognitive overhead.

Changes

• Delete src/pages/preview/[prNumber].astro (283 lines) — Astro page with getStaticPaths, GitHub API integration, and Vercel preview URL resolution
• Remove the now-empty src/pages/preview/ directory

Testing

# Verify no references were missed
rg -l "preview" --type-add 'code:*.{astro,ts,js,mjs,cjs,json,md}' --type code src/ frontend/ docs/

# Check build is unaffected
cd frontend/web && npm run build

No functional impact — no pages link to /preview/* and no sitemap entry references it.

Links

• Related issues: N/A (standalone sweep)
• Part of: epic_A — Hygiene garden & branch slim
• Area: compute-infra

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CodeAnt-AI Description

Remove an unused preview page

What Changed

• Deleted the orphaned /preview/[prNumber] page that was not linked from anywhere in the app
• Removed the old preview redirect and fallback 404 content tied to that page

Impact

✅ Fewer unused routes
✅ Smaller deploy surface
✅ Lower risk of stale preview pages

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[github-actions]

Legacy Tooling Scan Report

Severity	Count
Critical	0
High	0
Medium	0
Low	0

No violations detected.

This is a WARN-mode scan. Fix before strict enforcement begins.

[gemini-code-assist]

Code Review

This pull request deletes the Astro page component that was responsible for generating static preview redirect pages for open pull requests on GitHub. As there are no review comments to evaluate, I have no feedback to provide.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

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CodeAnt AI finished reviewing your PR.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 700e9bece1

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[chatgpt-codex-connector]

Preserve the canonical preview route

When the landing Astro pages are deployed, this file is the route definition for /preview/<pr#>; deleting it removes the Tier-3 preview microfrontend rather than just an unreferenced import. I checked for a replacement route or redirect and did not find one, so externally shared stable PR-preview URLs now fall through to 404 even though the deleted page documents this path as the canonical redirect surface. If the endpoint is being retired, add an explicit redirect/tombstone or update the governing spec before removing the route.

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