The localized-link pairing rule that landed on master requires Chinese
notes to link Chinese counterparts; fix this PR's note and the
composer-edit-range note the rule landed after, so the merge ref
passes the gate. The full-manifest closure walk gets an explicit
timeout: coverage instrumentation on a loaded runner pushes it past
vitest's 5s default. Refs #2846.
Each index route also emits a parent-level alias twin, projected over
the alias route so its relative links stay correct; llms.txt and the
docs now state the drop-trailing-slash convention exactly. Frontmatter
failures name their page, the twin pass refuses to overwrite existing
build files, the dev middleware documents the deliberate in-page
fetch() divergence, and the per-locale collection order moves to one
shared export. Refs #2846.
Append .md to any published route for the page as plain Markdown: the
build emits a raw-Markdown twin of every route (frontmatter dropped,
home bodies kept, images beside pages) plus a manifest-generated
llms.txt, the dev server serves both per request, and the post-build
gate fails when either is missing. Fixes#2846.
