Add boss team match playstyle rule

When enabled, the sticky boss banner shows the next boss's team size
as a hint for players who voluntarily match the boss's party count.
Handles variant boss teams by using the auto-detected starter variant.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.beans/nuzlocke-tracker-sij8--add-gift-clause-rule.md

@@ -1,11 +1,11 @@
 ---
 # nuzlocke-tracker-sij8
 title: Add gift clause rule
-status: in-progress
+status: completed
 type: feature
 priority: normal
 created_at: 2026-02-20T19:56:10Z
-updated_at: 2026-02-20T20:53:15Z
+updated_at: 2026-02-20T20:55:23Z
 parent: nuzlocke-tracker-49xj
 ---