feedback1 final: merge the 突变细胞 bench rule (carrier destroyed, tile freed, the new operator gained into the 整备区; pointed out in PR #2)

Conflicts resolved keeping both sides:
- effectsMeta.js header: the QA residual's "every [holder, item] pair, taken before the first item runs" and "an item
  moved during it runs at most once", with the cell branch's wording of what 突变细胞 does mid-walk.
- DESIGN §6.6: the band pick that skips a strategy tied to a switched-off bond and the deployment of the operator a
  transformation gains / the bench shed that spares it.
- DESIGN §21.25: PR #2's bench rule credited (the cell branch) plus the QA residual's snapshot-timing sentence.
- PLAYING: the new 突变细胞 sentence with the residual's hammer sentence (revives, borrowed hammers, the lend window).
- docs-consistency: both new tests (batch 6 QA residuals; 突变细胞 after the WA merge).

CHANGELOG.md

@@ -43,6 +43,7 @@
 
 - 拉普兰德：获得她之后本回合的首次刷新也会叠叙拉古层数，每名拉普兰德各自计算。
 - 昆图斯的突变细胞不会用完消失：每场战斗后装备者换成高一阶的随机干员，突变细胞和其他装备退回整备区，可以再次配发。
+- 突变细胞换来的新干员和官方一样进入整备区，原来的格子空出来、可放置角色加 1，需要自己重新部署（人机和 AI 托管会照常部署它）；凑齐同名干员时照常合成精锐（PR #2 指出）。
 - 标准模拟按官方禁用奥术等盟约，卡片和盟约详情标明「本局禁用」。
 - 变形同构体配转职装备时，盟约成员列表和干员卡片算上装备者（标「同构」）。
 - 带奥术法阵时，场上炎佑造成伤害也会使目标失去特殊能力 5 秒；带源石溶剂时炎佑每秒受到 60 点伤害。