feat: add Chinese i18n, code syntax highlighting, and site localization

[Copilot]

Adds Chinese (zh) locale support, integrates highlight.js for code block syntax highlighting in embeds, and localizes all hardcoded site UI text through Paraglide JS message functions.

i18n

• Added zh locale to Paraglide config and created messages/zh.json with full Chinese translations
• Extended en.json and de.json with ~65 new message keys covering nav, hero, features, integration cards, CTA, footer
• Replaced all hardcoded English strings in Header, Footer, __root, and index.tsx with m.*() calls
• Simplified LocaleSwitcher — shows display names (EN / DE / 中文), dropped verbose "Current locale" prefix

Code highlighting

• Added highlight.js with tree-shaken language imports (JS, TS, Python, Go, CSS, HTML, JSON, YAML, SQL, Shell, Markdown)
• src/lib/highlight.ts exports highlightCodeBlocks() which runs hljs on pre[data-language] code elements
• Integrated into embed route — highlights after innerHTML injection
• GitHub light theme via CSS import; dark mode colors scoped under .dark; .hljs { background: transparent } defers to embed theme's --me-code-bg

Build optimization

• Added hljs-vendor manual chunk in Vite config

Test updates

• Paraglide messages mock upgraded to Proxy-based — auto-returns key name for any undefined message, no need to manually add stubs
• Smoke test assertions updated to match message-key-based rendering

// Before
<h1>Share your thoughts <span>anywhere</span></h1>

// After
<h1>{m.hero_title_main()} <span>{m.hero_title_highlight()}</span></h1>

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• cdn.jsdelivr.net
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/memos-embed/memos-embed/apps/site/node_modules/.bin/../vite/bin/vite.js build (dns block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/memos-embed/memos-embed/apps/site/node_modules/.bin/../vite/bin/vite.js dev --port 3000 ighlighting o-authored-by: markbang <119404476+markbang@users.noreply.github.com> (dns block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/memos-embed/memos-embed/apps/site/node_modules/.bin/../vite/bin/vite.js build grep -l PluginImportError nlang/paraglide-js/dist/compiler/runtime/strategy.test.js grep (dns block)
• eu.posthog.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/memos-embed/memos-embed/apps/site/node_modules/.bin/../vite/bin/vite.js build (dns block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/memos-embed/memos-embed/apps/site/node_modules/.bin/../vite/bin/vite.js dev --port 3000 ighlighting o-authored-by: markbang <119404476+markbang@users.noreply.github.com> (dns block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/memos-embed/memos-embed/apps/site/node_modules/.bin/../vite/bin/vite.js dev --port 3000 --local pull.rebase it (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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Summary by cubic

Add full i18n with a new Chinese (zh) locale and language switching across header, footer, and home. Add theme-aware code syntax highlighting in embed previews.

• New Features

  • Localized nav, theme names, aria labels, “skip to content,” and footer; added zh messages, updated en/de, adjusted inlang settings, and updated tests/mocks.
  • Integrated highlight.js to auto-highlight code blocks in the embed route, imported GitHub styles with dark overrides, and split highlighting into a vendor chunk (hljs-vendor).

• Bug Fixes

  • Renamed LinkButton prop from labelKey to label to match usage and prevent type errors.

^{Written for commit b048e39. Summary will update on new commits.}

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Project	Deployment	Actions	Updated (UTC)
memos-embed-site	Ready	Preview, Comment	Mar 7, 2026 9:13am

[cubic-dev-ai]

No issues found across 17 files