Overriding DocContent took the upstream module out of the bundle, and
with it the `doc.css` it imports as a side effect. Every page rendering
through DocLayout lost its article typography, table scroll container
and heading anchors — while the rest of the theme stayed intact, which
is why only some styles went missing.
The sole reference to the upstream component was a `typeof`, erased at
compile time, so the bundler saw a module it could drop.
- Delegate to the upstream component when a page has no hoisted bands,
which keeps that module and its stylesheet in the dependency graph.
- Move the hoisting variant into its own component, so useScrollAfterNav
is not called after a conditional return. DocContent survives
client-side navigation, so its hook count has to stay constant.
zihluwang
f51407b98b