Phase 20 ships the editor's F9 menu bar as a self-contained,
testable widget. Mirrors Midnight Commander's
src/editor/editmenu.c structure (six top-level menus with
arrow-key navigation, dropdown rendering, item dispatch).
Components:
src/editor/menubar.rs — EditorMenuBar + EditorCmd + render()
src/editor/mod.rs — pub mod menubar declaration
Tests: 10 unit tests in editor::menubar cover menu navigation
(arrows, wrapping, separators), Esc/F9 close, Enter dispatch,
letter hotkey menu selection by title, and render smoke test.
Wiring into the editor's main handle_key + render path is the
natural next step; the user has separately committed
dfed245e4a / 0d999dc4ed which add Key::LEFT/RIGHT/UP/DOWN
constants + to_char() method required for the dispatch path.
PLAN.md header bumped to Phase 20 complete.
vasilito
8935be79eb