refactor: split casino.go, dedup helpers, remove audit docs

1 files changed, 6 insertions, 0 deletions

diff --git a/internal/game/act_steal.go b/internal/game/act_steal.go
index 7df400b..50c83ee 100644
--- a/internal/game/act_steal.go
+++ b/internal/game/act_steal.go
@@ -146,6 +146,12 @@ func (g *Game) resolveStealTarget(p *player.Player, input string) (targetType st
 	})
 
 	if len(matchingMobs) > 0 {
+		// Out-of-range 1-based selectors are no-target, matching findMob. The
+		// previous fallthrough silently stole from the first mob for a single
+		// candidate and reported "nothing here" only for 2+ candidates.
+		if instanceIdx >= 0 && instanceIdx >= len(matchingMobs) {
+			return "", nil, nil, "There's nothing here to steal from."
+		}
 		uniqueDefs := make(map[string]bool)
 		for _, m := range matchingMobs {
 			uniqueDefs[m.DefID] = true