[MotherSphere]

The English rewrite in #25 replaced Lin's French docs/docs.md with docs/project/decisions.md and docs/README.md. Lin wanted two things kept from it: the open items of its documentation roadmap, and the French pages themselves. This restores both.

Brought back into the English docs

Compared against git show f6239dd^:docs/docs.md:

• Open roadmap items, as a "Documentation still to write" section in docs/project/decisions.md, each marked open: interaction diagrams (modules and data flow), the iced render cycle and state model in detail, and tying the code examples in docs/ to the crate so cargo test --doc compiles them. A fourth open item asks for each page to carry the date it was last checked against the code, which the old file required and no page does today.
• How the docs stay honest (the old "Sur la relecture des documents"), as a "How these pages stay true" section in docs/README.md: no "reviewed" checkboxes, sources cited by file and symbol or test name, the symbol counts when a line number disagrees.
• Two dropped rules: Rust edition 2024 with Cargo.toml and Cargo.lock kept current, and full keyboard and mouse use.

Not brought back: the "gaps from the ecosystem convention" section, since #25 fixed all of them (English docs, docs/ sorted by reader, README on the template). The completed roadmap items and the quality section are already covered by docs/internals/architecture.md.

French pages

Under docs/i18n/fr/, mirroring the repo root, the same layout as Project-Colony/Eidos:

• docs/i18n/fr/README.md
• docs/i18n/fr/docs/README.md
• docs/i18n/fr/docs/project/decisions.md, reusing Lin's original wording wherever it still matches the current English.

Each starts with <!-- xion-i18n: source=<path> sha=<git hash-object of the source> -->. The README gets a short "## Language" section linking them. English stays canonical.

Checks

scripts/i18n-check.sh and scripts/i18n-links.py are copied from Eidos, with the stamp renamed to xion-i18n. The first fails when an English source changes after its translation was stamped, or when a translation's headings, code fences or table rows no longer match the source; the second fails on any Markdown link or anchor that leads nowhere. A new translations up to date CI job runs both, with actions/checkout pinned by full SHA like the other jobs. Both pass locally; docs/internals/architecture.md lists the new job.

The job is not a required check yet; adding it to branch protection is a separate setting.