Problem: the menu parity figure in docs/target-app-parity.md came from an
ad hoc label-matching script over string literals; nothing repeatable
measured the real menu bar (docs/gaps.md G7).
Fix: `cargo xtask parity` dumps the shipped menu bar (new
`menus::default_menu_items`, deterministic: English, default prefs,
built-in workspaces; printed by `examples/menu_tree.rs`) and compares it
with a reference list of menu paths, by default the local, never-committed
`plan/premiere/menus.json` (any JSON of paths via --reference; parsing is
depth- and size-capped). Presence and placement are reported separately
(same path, elsewhere, missing); app/Help/recent/account/macOS items are
out of scope. Writes a markdown checklist (target/parity/ or --out) and
--min fails below a presence threshold. Without a reference it prints our
inventory only.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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