Popular v0.9.0

Added

• Base-aware URL helpers, as public surface. Astro: withBase() and
  absoluteUrl() from src/lib/url.ts, exported by the package as
  astro-theme-popular/url. Hugo: rel-src.html (images and assets) and
  abs-url.html (absolute URLs) join the existing rel-href.html. Use them
  for any URL your own components, overrides or templates emit, and a subpath
  install keeps working. The Astro template repo's astro.config.mjs gained a
  base constant at the top: leave it '/' for a site at a domain root.

Fixed

• Sites served from a subpath now work in both themes. A site deployed to
  user.github.io/repo/ (Astro base, Hugo baseURL with a path) built and
  styled correctly but every internal link and image stayed at the server root
  and 404'd. Both frameworks rewrite the asset URLs they generate themselves,
  and neither touches the paths a template writes, so those had to be resolved
  explicitly.
  • Astro: new withBase() / absoluteUrl() helpers (lib/url.ts, exported
    from the package as astro-theme-popular/url) now resolve every URL the
    theme emits: navigation, cards, tags, pagination, the brand link, images
    from config and front matter, the shared behaviour scripts, and the
    absolute URLs in canonical, og:image, JSON-LD, RSS, llms.txt,
    robots.txt and the iCalendar feed. Markdown bodies are handled by a hook
    the integration registers on the active Markdown processor.
  • Hugo: rel-href.html now has a sibling, rel-src.html, for images and
    assets, plus abs-url.html for absolute URLs. Front matter written the
    Astro way (image = "/images/x.png") previously lost the subpath, because
    relURL/absURL treat a leading slash as the server root. Card, hero,
    logo, favicon, avatar and body images, the JSON-LD url/logo/image
    fields and og:image all go through them now.
  • Adopter configs and content need no changes: the helpers pass external
    URLs, mailto:, tel: and #fragment through untouched, and accept
    paths written with or without a leading slash.
  • Both repos build a subpath site in CI and fail on any internal href or
    src left at the root (PARITY.md, "Subpath deployments").
• Astro package: markdown images regained loading="lazy" decoding="async".
  Astro 7's default Markdown processor does not run rehype plugins, and a
  plugin added by an integration after config validation was dropped silently
  (Astro warned on every build). The theme's hooks are now registered on the
  active processor, in that processor's own plugin shape.