ci: add release automation and changelog mirror

[KyleTryon]

Summary

• add Conventional Commit PR-title validation for future release automation
• add a manual release workflow that plans SemVer, smoke-tests/publishes Docker images, creates GitHub Releases via API, and triggers the Cloudflare Pages deploy hook
• add a static /changelog page that mirrors GitHub Releases at Astro build time

Notes

• Docker tag publishing now lives in the release workflow; the Docker workflow remains for PR/manual smoke builds.
• GitHub repo merge settings were updated separately to squash-only with PR-title squash commits.
• After this lands on main, enable branch protection requiring PR Title / Validate title, CI / Lint and build, and Docker / Build image.
• Add CLOUDFLARE_PAGES_DEPLOY_HOOK_URL before running a real release.

Validation

• pnpm lint
• pnpm test
• pnpm knip
• pnpm build
• pnpm build:web
• pnpm test:release
• production preview screenshot for /changelog

[cloudflare-workers-and-pages]

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	cliparr-web	b531027	Commit Preview URL Branch Preview URL	May 28 2026, 11:34 PM

[Copilot]

Pull request overview

Adds release automation infrastructure: a Conventional Commits PR title validator, a manual release workflow that plans the next SemVer, smoke-tests/publishes the multi-arch Docker image, creates a GitHub Release, and triggers a Cloudflare Pages rebuild. The website also gains a /changelog page that mirrors GitHub Releases at Astro build time.

Changes:

• New Release and PR Title GitHub workflows; existing Docker workflow scoped to PR/manual smoke builds only.
• Release planning/notes helpers under scripts/release/ (conventional commit parsing, SemVer bump, prerelease numbering, GitHub Release creation) with node --test coverage of conventional.mjs and new root scripts test:release / release:plan.
• Astro /changelog page backed by a small markdown renderer and GitHub Releases fetcher, with header/footer nav entries and matching .release-notes styles.

Reviewed changes

Copilot reviewed 16 out of 17 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/workflows/release.yml	New manual release workflow: plan, validate, smoke-test, push image, create release, trigger Pages hook.
.github/workflows/pr-title.yml	New Conventional Commit PR-title check via amannn/action-semantic-pull-request.
.github/workflows/docker.yml	Drops tag-push trigger and publish path; remains PR/manual smoke build only.
scripts/release/conventional.mjs	Conventional Commit parser, SemVer/tag utilities, change summary helpers.
scripts/release/plan-release.mjs	Plans next version, docker tags, GitHub output values from git log + PR titles.
scripts/release/create-github-release.mjs	Generates notes, composes Docker section, creates GitHub Release via API.
scripts/release/conventional.test.mjs	node:test suite covering classification, bumps, prerelease, merge-commit parsing.
package.json	Adds test:release (run first by test) and release:plan scripts.
apps/www/src/pages/changelog.astro	New static changelog page rendering releases at build time.
apps/www/src/lib/githubReleases.ts	Fetches and normalizes GitHub Releases for the site.
apps/www/src/lib/markdown.ts	Minimal escape-first markdown renderer for release bodies.
apps/www/src/styles/global.css	.release-notes prose styles.
apps/www/src/components/Header.astro, Footer.astro	Link to /changelog.
apps/www/src/env.d.ts	Typing for optional GITHUB_TOKEN env var.

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