next.js

d7335b75 - Revert "Refine the not-found rendering process for app router" (#52977)

Revert "Refine the not-found rendering process for app router" (#52977) Reverts vercel/next.js#52790 Reverting temporarily as this breaks turbopack's not found handling due to the app tree being generated there not having the necessary parallel routes in the `_not-found` entry x-ref: https://github.com/vercel/next.js/blob/0df8aac935741808ee6aee78a8b545b2c1405f29/packages/next-swc/crates/next-core/src/app_structure.rs#L677-L681 x-ref: https://github.com/vercel/next.js/actions/runs/5616458194/job/15220295829