strings.lua holds English defaults. ctx.t(key, ...) looks up the key,
optionally string.formats with extra args, and falls back to '[key]'
for missing entries. All panels and init.lua sweep clean of inline
literals — verified by a grep over '"[A-Z][a-z][a-z ]+"'. This sets
up v2's localization-lib-pattern (separate slice, ADR-0036 trigger)
to swap STRINGS without touching the launcher code.
Detail-panel bottom-right Launch button: switches to the selected
module via engine.switch_module if dep-check is clean, otherwise
opens a modal listing conflicts with Cancel + 'Launch anyway'. The
latter is greyed out unless engine.module.switch_module_supports_fallback
is exposed (separate engine slice). FSM adds STATE_MODAL_CONFLICT
with transitions to/from STATE_LIST via cancel/launch_anyway/esc.
Generic panels/modal.lua takes a def-table (title/body/buttons) and
returns the clicked button id from handle_click; reusable for future
modals beyond the conflict case.
