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

test/match/facing.test.js

@@ -142,7 +142,7 @@ test('effect-placed pieces: a transformation / a merge elite taking a consumed c
   const np = ps.transformChess(a, other);
   assert.ok(np && ps.board.get(tileKey(9, 3)) === np, 'kept the tile');
   assert.equal(np.dir, 'DOWN');
-  // merge with a full hand and temp: the elite takes a consumed copy's freed board tile, with its dir
+  // merge of deployed copies (PRTS: the elite goes to the consumed copy's board position), with its dir
   ps.board.clear();
   ps.hand.fill(null);
   ps.temp.fill(null);