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.
Render auto-width grid children at their resolved track widths before resolving row heights. This keeps wrapped content visible and prevents stale intrinsic heights from clipping the final line.
Verification: make grid-tests EMACS=/Applications/Emacs.app/Contents/MacOS/Emacs; make compile EMACS=/Applications/Emacs.app/Contents/MacOS/Emacs; make check EMACS=/Applications/Emacs.app/Contents/MacOS/Emacs.
Measure auto-width children intrinsically, constrain them to resolved tracks, account for border-box wrapper content, and align every rendered line before painting the wrapper border.
Measure every rendered line when a column determines its natural width so a narrower first Grid line cannot cause later lines to overflow after stack padding.\n\nVerified with make check; core 545/545 and Grid 11/11 passed.
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.
