Record in AGENTS.md that localization/strings.json is the single source of truth
and the KMP XML + Apple xcstrings/L10n.swift are generated by the loc CLI and must
never be hand-edited — a key present only in a generated file is dropped on the
next regeneration (which is how the transfer-cache strings were lost in the merge).
Make agent instructions imperative and command-first, add nested
crates/vnidrop and shared guides, and keep compose-skill as the UI
source of truth with VniDrop-specific overrides.