Adds a ScrimDismissible marker to ui_modal that opts a modal into
the standard "click outside the card to close" gesture. The new
dismiss_modal_on_scrim_click system fires on a left-mouse press
whose cursor falls on the scrim and outside every ModalCard, then
despawns the topmost dismissible scrim — Bevy's hierarchy despawn
cascades to the card and its children.
Marker design is opt-in per modal so destructive / state-mutating
modals (Settings saves on close, Onboarding requires explicit
acknowledgement, Pause / Forfeit / ConfirmNewGame need confirmed
intent) don't lose work to an accidental scrim click. Three
read-only modals opt in this round:
- Stats — informational; press S or click outside to dismiss.
- Achievements — read-only list.
- Help — keyboard reference.
Profile, Leaderboard, and Home will opt in the same way in a
follow-up; they were left out to keep this commit's scope tight.
The hit-test path uses each ModalCard's UiGlobalTransform +
ComputedNode bounding box so stacked modals close cleanly: the
topmost dismissible scrim is the only candidate per click. Tests
spawn synthetic ComputedNodes (with bevy::sprite::BorderRect for
the resolved-border slots Bevy's UI module re-exports) so the
geometry hit-tests deterministically without running the full UI
layout pipeline.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
funman300
a54201e97b