Normalize size units and intrinsic sizing across Elisp and native layout. Add help, pointer, hover-style and keymap support with reusable interaction adapters.
Keep content updates local, preserve scroll caches and hover borders, and avoid rebuilding retained plans and ownership metadata for stable geometry.
Validation: make check and native-rust-tests passed; targeted native interaction and scroll publication regressions passed.
Expose detached committed snapshots and explicit canonical construction ownership. Preserve scoped publication and rollback, share Box decoration, and reuse completed Flex/Grid work only under proven constraints.
Compile CSS-like selectors to TP structured ASTs and make TP the sole final matcher while Ebox retains logical tree adaptation and candidate indexes. Separate logical selector types from raw runtime type counts so internal flex adapters still drive bounded scroll scheduling without leaking into selector semantics.\n\nVerified: make check EMACS=/Applications/Emacs.app/Contents/MacOS/Emacs
Assign retained TP identity before layout and emit pure, runtime-free surface plans with exact character and text-property equivalence. Keep live publication unchanged for the staged cutover and add focused surface, package, docs, and CI contracts.\n\nVerified: make check EMACS=/Applications/Emacs.app/Contents/MacOS/Emacs\nVerified: WERROR byte compilation for all 16 active Lisp files\nVerified: focused ebox-surface checkdoc has zero warnings
Split the verified renderer, layout engine, Grid support, native boundary, tests, examples, and paired documentation into the independent Ebox repository. Keep ETAF and application concerns outside this package.
