next.js

cb469ded - [test] Expand root-param navigation regression coverage (#98731)

[test] Expand root-param navigation regression coverage (#98731) This extends the coverage for #98674 to root-param reads inside nested public caches and static-stage reuse during Cached Navigations. The tests verify that an initial document's extracted static stage is not reused across locales. A same-locale control verifies that reuse still works when only a fallback parameter changes. The cross-locale test checks the pending navigation state because the final dynamic response can otherwise hide incorrect static-stage reuse.