CLS was 0.192 on every public route, and one element accounted for all of
it: the footer moved at t≈482ms, right when the lazily loaded route chunk
arrived. The site frame laid the footer out in normal flow, so before the
content existed it sat at the bottom edge of the viewport — visible — and
then dropped out of view when the page grew to 2400px.
The frame is a flex column now with the footer pinned by `margin-top:
auto`, and the content slot holds a viewport of height so the footer
starts below the fold and only ever moves further out of sight. The slot
is `main` once the route renders and `section.ui-page` while Suspense is
pending; covering only the first left the shift in place, which is what
the intermediate measurements showed.
/ /explore /projects /releases /search /profile 0.1924 → 0.0001
360 / 768 / 1440 across four routes: no horizontal overflow
Separately, the route gate stopped the Studio page but not the Studio
shell, so a signed-out visitor who typed /studio still got the whole
workspace navigation — 작업본, 게시 기록, 새 문서, by name. No data crosses
an href, but "비로그인 사용자가 Studio 화면을 볼 수 없다" is not satisfied by
hiding the contents of a screen while showing the screen. The header is
drawn only for an authenticated session; `children` is already the
router's sign-in surface, which is the whole of what such a visitor gets.
signed out h1 "세션이 필요합니다." 0 nav, 0 studio links
signed in h1 "작업 흐름" 2 nav, 8 links, sign-out present
Three test updates follow from behaviour that changed rather than broke:
the frozen route inventory now derives `access` from each route's own
layoutGroup instead of asserting "public" for all 28 — so a Studio route
added without a gate fails that table too — and the router and shell
harnesses supply the session the Studio surface now reads. The router
suite also gains a test that a signed-out visitor gets neither the Studio
heading nor its navigation, which is the regression the gate exists for.
test:all is 1811 passed; the eight remaining failures are the three
load-dependent flake families (ci-artifact-contract,
provider-guardian-transaction, security-followup), all of which pass in
isolation and reference none of the changed files.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
