Playtest #6 follow-up (v2.5.1): leader HP review — 直接乘算, one debuff instance, 999 layer cap, 限伤; elite to the board; 假想敌：胄 kit

- co-op leaders died within seconds: leader HP is the official data (40 values pinned); bond / strategy / item /
  机变 / 特质 "+X%" bonuses now add up (PRTS 直接乘算) instead of compounding; a same-named enemy debuff keeps one
  (strongest) instance per target (奥术 across a pair field); leader parts pass damage 1:1; fixed co-op pool (the user's call)
- official limits read from the client: each bond stops at 999 layers (MAX_GARRISON_STACK); a leader hit of 300000+ in
  boss / hidden battles is cancelled (MAX_BATTLE_DAMAGE, 限伤) — shared/constants.js switches, research 11
- a merge that consumes a deployed copy puts the elite on that tile and facing (user-confirmed); gold target highlight,
  promotion effect
- 假想敌：胄 per PRTS: one shell, shells within range, any drone death costs 2 % max HP, 剑/锤 sorties and 瘫痪
- DESIGN §20.10–§20.14; 2842 unit tests, all 28 browser suites green; Chrome = Node on boss fields

public/css/screens/game-panels.css

@@ -199,6 +199,8 @@
 .dempty { font-size: .14rem; }
 .dhint { display: flex; align-items: flex-start; gap: .06rem; font-size: .14rem; color: var(--text-lo); line-height: 1.6; }
 .dhint .icon { width: .16rem; height: .16rem; margin-top: .03rem; flex: none; }
+/* a merge-completing shop / reward card's 可晋升 destination (the tag's colour; touch shows no title — QA 6b) */
+.dhint--merge { color: var(--gold); }
 .dactions { display: flex; justify-content: flex-end; gap: .1rem; padding-top: .06rem; border-top: 1px solid var(--line); }
 .dsell { margin-left: .06rem; color: #1d1400; }
 .dfactions { display: flex; flex-wrap: wrap; gap: .06rem; }