Same wrong-testid bug as the Close click handler: the CSS rule
that's supposed to position the hidden ``st.page_link`` off-screen
was selecting ``a[data-testid="stPageLink"]``, but the bare
``stPageLink`` testid is on the OUTER wrapper div — the anchor
uses ``stPageLink-NavLink``. ``:has(a[data-testid="stPageLink"]...)``
matched nothing, so the helper rendered as a full-size visible
row at the bottom of every page (the "large white bar blocking
content" the user reported).
Fix: switch both the ``:has()`` rule and the no-:has() fallback
to ``a[data-testid="stPageLink-NavLink"][href*="close"]``. The
``href*="close"`` form also works for base-path deployments
(``/myapp/close``), matching the click handler's selector.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Michael
24ee021314