The HUD action bar (Menu / Undo / Pause / Help / Modes / New Game) and
the five Home mode-launcher cards now participate in keyboard focus,
extending Phase 1's modal-only coverage.
The HUD focus group activates only when no modal is open and the
mouse is hovering an action-bar button — the design decision avoids
stealing Tab from selection_plugin's card-selection nav for the
common "playing on the board" case. Once engaged, Tab/Shift-Tab cycles
the bar in spawn order and Enter activates. Moving the mouse off the
bar clears focus so the ring doesn't linger.
Home mode cards opt into FocusGroup::Modal(home_scrim) via an
ancestry-walking system that mirrors the Phase 1 attach helper, so
spawn_mode_card's signature is unchanged. Locked cards (Zen,
Challenge, Time Attack at level <5) get the Disabled marker so Tab
skips them and Enter is a no-op — mirroring the existing visual
locked state with real keyboard semantics.
handle_focus_keys gains a Hud-on-hover branch in its active-group
resolver and a clear_hud_focus_on_unhover system. Together they
implement the agreed UX: focus follows hover when the bar is active,
Tab cycles within the hovered group, and the ring disappears the
instant the mouse leaves.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
funman300
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