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/sim/playtest6_bosspool.test.js

@@ -139,8 +139,11 @@ for (const bossId of BOSSES) {
     const pool = new SharedBossPool(max);
     const { b } = bossBattle(bossId, pool);
     const leader = b.enemies.find((e) => e.alive && e.isBoss);
-    const dealt = b.dealDamage(null, leader, { amount: 1e9, type: 'true', mul: (max - 0.4) / 1e9 });
-    assert.ok(dealt > max - 1, `${bossId}: the hit took the whole pool (${dealt} of ${max})`);
+    // the team already dealt all but 250000 (one hit of the whole pool would be cancelled by 限伤, BOSS_HIT_LIMIT 300000)
+    const rest = 250000;
+    pool.damage('p_1', max - rest);
+    const dealt = b.dealDamage(null, leader, { amount: 1e9, type: 'true', mul: (rest - 0.4) / 1e9 });
+    assert.ok(dealt > rest - 1, `${bossId}: the hit took the rest of the pool (${dealt} of ${rest})`);
     assert.equal(pool.hp, 0, 'not 0.4 HP: nobody would ever see it and no hit may be needed to finish it');
     for (let i = 0; i < 3 && !b.finished; i++) b.step();
     assert.equal(b.finished, true);