Three independent CI failures from run 25916500415:
1. Smoke test [linkToSection aria-label] fail on Hugo 0.146 leg.
The assertion pinned to $post selected via `find ... | head -1`,
which on 0.146 picked `doc-sach-quan-sat/index.html` — a post with
zero h2/h3/h4 headings, so zero heading-anchor markup. Rewrite the
check to scan all built post HTML (same pattern already in use for
render-link rel). Now reports 13 matches on the demo build.
2. htmltest URLSwap silently never matched. The prior
`^/tsuki/: /` config (added in d30f50f) used a regex anchor that
doesn't match htmltest's substring evaluation against minified
`href=/tsuki/...` attributes. Switch to the unanchored
`"/tsuki/": /` form. CI has been failing on this since v0.2.0
despite the "fix" commit; this is the real fix.
3. head.html referenced `/favicon.ico` and `/favicon.svg` but neither
asset existed in exampleSite/static/. Add a minimal SVG favicon,
drop the legacy .ico reference (modern browsers fall back to a
site-rooted /favicon.ico by convention; sites needing one can
override head.html). Switch the SVG link to `relURL` so the
`/tsuki/` baseURL prefix is honoured under GitHub Pages subpath
deploy.
Local validation: all 32 smoke checks green; favicon resolves to
`/tsuki/favicon.svg` and ships in the build artifact.
tiennm99