blog.hangerthem.com/components/layout/Sidebar.tsx
HangerThem 30ef0d611e Bug fixes, SEO, performance and accessibility pass (#1)
## Summary

A cleanup pass across the blog: route and feed bugs fixed, SEO basics added, smaller and lazier images, accessibility fixes, and a real README. No content or design changes beyond small fixes.

## Bug fixes

- **Tag/category pages**: static params now use slugs, so pre-rendered pages match the links (before, `/tags/standard-model` was only rendered on demand and the pre-built pages said "Tag not found"). Unknown slugs now return a real 404, and there's a new not-found page.
- **Recently updated**: sorts by last modification *before* taking the top 5, so older posts that were updated recently now show up.
- **Atom feed**: `rel="self"` now points to `/feed.xml` (was `/feed`); `<updated>` uses the `updated` frontmatter field.
- **No-JS flash**: the `no-js` → `js` class swap runs in an inline `<head>` script before first paint, not after hydration.
- **Markdown links**: only internal paths go through `next/link`; `#anchors`, `mailto:` and links without an `href` no longer break.
- **Invalid HTML**: images in a paragraph together with text (e.g. "**Screenshots:**" followed by images on the Projects page) produced `<p><figure>` and a hydration error. Those paragraphs are now split.
- **Dates**: frontmatter dates are normalized to ISO, so `<time datetime>` values are valid. Formatting is pinned to Europe/Prague so a UTC build server can't shift a date by a day.

## SEO

- `sitemap.xml` and `robots.txt`
- Canonical URLs, Twitter cards and a feed link on every page, built by a shared `pageMetadata()` helper
- Generated Open Graph images: a site card, and for each post its cover image or a branded title card (pre-rendered at build time)
- `BlogPosting` JSON-LD on post pages

## Performance

- Only the post cover and the latest-post image are preloaded (was: every image)
- In-post image quality 100 → 90, plus responsive `sizes`
- Screenshots downscaled to 1800px wide; `linkboard-old.png` converted to WebP (3.1 MB → 60 KB)
- `CodeWrapper` is now a server component; only the copy button ships to the client
- Mermaid CDN script pinned to `11.17.2` for reproducible builds

## Accessibility

- Accessible names for icon-only links (share, social, mobile nav) and `aria-current` on active nav items
- Copy button: uses React state instead of mutating `innerHTML`, handles clipboard errors, announces the result to screen readers, and is no longer inside an `aria-hidden` header
- Code-block line numbers hidden from screen readers
- Image captions: the Markdown `"title"` becomes the caption; captions that only repeat the alt text are hidden from screen readers

## Content & maintenance

- **Frontmatter validation**: a missing or malformed field fails the build and names the file, instead of rendering a broken post
- **`draft: true` support**: drafts only render in development
- About/Projects/Setup pages share one `MarkdownPage` component; tag/category lists share `PostList`
- Markdown rendering is cached, so metadata and page share one render
- New README covering features, env vars, frontmatter schema, Markdown extensions and deployment
- Removed unused ESLint setup and the unrelated `hast` package; `oxlint`, `oxfmt` and `puppeteer` moved to devDependencies (locked versions unchanged)
- Typo fix in the Tessera cover alt text; removed unused `math`/`mermaid` flags from two posts

## Deployment notes

- **`SITE_URL` is now required**: the build fails with a clear error if it's missing.
- **Puppeteer is a devDependency now**: Nixpacks installs dev dependencies for the build by default, but check that Mermaid diagrams render on the first deploy (the Standard Model post has one).

## Testing

- `tsc --noEmit` and `bun run lint` pass
- `bun run build` passes; all 81 pages are generated statically
- Smoke-tested `next start`: posts, tags, categories, feed, sitemap and OG images return 200; unknown tags and routes return 404
- No block elements nested inside `<p>` in any built page

Reviewed-on: #1
2026-10-19 12:41:40 +00:00

75 lines
2.2 KiB
TypeScript

import { SITE_NAME } from '@/app/metadata'
import { NavLinks } from '@/components/layout/NavLinks'
import { siBluesky, siGithub, siMatrix, siTelegram, type SimpleIcon } from 'simple-icons'
import { ExternalLink } from '@/components/ui/ExternalLink'
import { getGitCommitHash } from '@/utils/git'
import Image from 'next/image'
type SocialLink = {
icon: SimpleIcon
url: string
}
const socialLinks: SocialLink[] = [
{
icon: siBluesky,
url: 'https://bsky.app/profile/hangerthem.com',
},
{
icon: siGithub,
url: 'https://github.com/hangerthem',
},
{
icon: siMatrix,
url: 'https://matrix.to/#/@hangerthem:hangerthem.com',
},
{
icon: siTelegram,
url: 'https://t.me/hangerthem',
},
]
const gitCommitHash = await getGitCommitHash()
const gitOriginUrl = process.env.GIT_ORIGIN_URL
export async function Sidebar() {
return (
<aside className="hidden lg:block w-64 shrink-0 px-4 bg-fg/5">
<div className="sticky top-0 flex flex-col h-screen gap-4 py-4">
<div>
<h2 className="text-2xl font-bold mb-4 flex items-center gap-2">
<Image src="/logo.png" alt="Ephemeris Logo" width={32} height={32} />
<span>{SITE_NAME}</span>
</h2>
<ul className="space-y-2">
<NavLinks />
</ul>
</div>
<div className="mt-auto flex gap-4 mx-auto">
{socialLinks.map(({ icon, url }) => (
<ExternalLink key={url} href={url} skipIcon aria-label={icon.title}>
<svg
aria-hidden="true"
dangerouslySetInnerHTML={{ __html: icon.svg }}
className="inline-block w-6 h-6 mr-1 fill-fg-dim hover:fill-accent transition-colors"
/>
</ExternalLink>
))}
</div>
{gitCommitHash && gitOriginUrl && (
<div className="text-xs text-fg-dim mt-2 mx-auto">
<span>Commit: </span>
<ExternalLink
href={gitOriginUrl + '/commit/' + gitCommitHash}
className="hover:underline"
skipIcon
>
{gitCommitHash.slice(0, 7)}
</ExternalLink>
</div>
)}
</div>
</aside>
)
}