feedback1 integrate: WT 蒂比's 起飞 is 对地规避 - ground enemies no longer select or hit her while airborne

Conflicts resolved keeping both sides:
- buffs.js FLAG_KEYS: liftoff beside the integration's selfBound.
- Battle.js: targeting import union (extendedGrid + evadesGround); _blockerFor keeps the
  fenced-tile gate (WU) and adds liftoff; applyStatus keeps the 无敌 + 无法选中 refusal and
  adds the 对地规避 refusal.
- enemies.js: header DOT entry from WT with the integration's INVISIBLE entry; import union;
  enemy_1273_stmgun_2 keeps the integration's rewrite (it filters through canTargetAlly,
  which now includes liftoff).
- tier2.js 蒂比 comment: the integration's 受到伤害前触发 text plus the 起飞 line.
- tier5.js 隐德来希 血镰: liftoff flag with the integration's foesInRadius.
- SIM.md: blocking keeps the fenced-tile passage and adds air-only blocking while airborne;
  the 污染秽蚀 / 燃烧区域 sentence goes before the chimera aura; statuses keep both refusals.

server/sim/damage.js

@@ -1,6 +1,7 @@
 // server/sim/damage.js — damage & heal pipeline, shields, dodge, element gauges (DESIGN §5.5).
 //
-// dealDamage order: (element → gauge path) | invulnerable? → 'hit' hook (mutable DamageInfo, may set cancel)
+// dealDamage order: (element → gauge path) | invulnerable? / 对地规避 (a ground enemy's damage to an airborne 起飞 ally —
+//   targeting.js evadesGround; not `ignoreSelect` damage: no selection, e.g. a debuff's tick) → 'hit' hook (mutable DamageInfo, may set cancel)
 //   → dodge (phys/arts, canDodge) → mitigation (phys: DEF, arts: RES, true: none)
 //   → × source dmgDealtMul (× phys/artsDealtMul) × target dmgTakenMul (not for 元素伤害) × type-taken mul × dmg.mul
 //   → 限伤 (leaders in boss / hidden battles: a hit of ceil(final) ≥ BOSS_HIT_LIMIT is cancelled, see leaderHitCancelled)
@@ -49,6 +50,7 @@
 
 import { MIN_DAMAGE_RATIO, ELEMENT, ELEMENT_ORDER, PALSY_MAX } from './constants.js';
 import { BOSS_HIT_LIMIT } from '../../shared/constants.js';
+import { evadesGround } from './targeting.js';
 
 const clamp01 = (v) => (v < 0 ? 0 : v > 1 ? 1 : v);
 
@@ -84,6 +86,10 @@ export function makeDamageInfo(d = {}) {
     cancel: false,
     noSp: !!d.noSp,
     ignoreSleep: !!d.ignoreSleep,
+    // no selection 无法选择 effects stop (an ability that "无视无法选择" such as PRTS 【污染秽蚀】, a direct pick, a flying
+    // unit's blast credited to a ground leader, the tick of a debuff already on the unit): reaches an airborne 起飞 ally
+    // whatever the source's 行动方式
+    ignoreSelect: !!d.ignoreSelect,
     sourceless: !!d.sourceless,
     attackId: d.attackId ?? 0,
   };
@@ -115,6 +121,19 @@ function sleepBlocks(target, source, dmg) {
   return !!target.s.flags.sleep && !dmg.ignoreSleep && !(source && source.profile && source.profile.hitSleep);
 }
 
+/**
+ * 起飞 (flag `liftoff`): a ground enemy's damage never reaches the airborne ally — it cannot select it (对地规避, PRTS 作战机制
+ * "AOE的判定是对攻击范围内的每个可以被选中的敌人进行判定"), so its splash, area abilities and element fills skip it, and a shot
+ * already in flight when it took off lands on nothing [ASSUMED: PRTS 伤害流程 7 "取消掉隐匿/无敌状态下的攻击" read for
+ * 对地规避]. Checked before the `hit` hook only: 蒂比 S2 takes off inside the hook of the hit that set it off, which then
+ * resolves as usual (dodged if physical / arts — PRTS 备注). Sourceless damage and `ignoreSelect` damage still land: no
+ * selection (targeting.js evadesGround) — 无视无法选择 abilities, direct picks, flying units' blasts, and the ticks of a
+ * debuff already on it (PRTS 异常效果: 无法选择 effects "仅在选择时生效"; the debuff's mods stay too).
+ */
+function liftoffEvades(target, source, dmg) {
+  return !!target.s.flags.liftoff && !dmg.ignoreSelect && evadesGround(source, target);
+}
+
 /**
  * Pure mitigation formula (exported for tests). `target` = the target's stats; `ign.elementalRes` = its 元素抗性
  * (epDamageResistance) for 'elemental' damage.
@@ -201,7 +220,7 @@ export function dealDamage(battle, source, target, dmgIn) {
   // gets the stats and the kill (PRTS 伤害分类 无来源 ③)
   const hs = dmg.sourceless ? null : source;
   let ts = target.s;
-  if (ts.flags.invulnerable || sleepBlocks(target, hs, dmg)) return 0;
+  if (ts.flags.invulnerable || sleepBlocks(target, hs, dmg) || liftoffEvades(target, hs, dmg)) return 0;
   if (battle._hooks.hit) {
     battle.emit('hit', { source: hs, target, dmg, credit: source });
     if (dmg.cancel || !target.alive || !target.deployed) return 0;
@@ -360,6 +379,7 @@ export function applyElement(battle, source, target, dmg) {
   if (!el || !(el in target.elem)) return 0;
   if (!hasHp(target)) return 0; // a killing blow's rider: the target is dead, nothing fills or bursts (header)
   if (target.s.flags.invulnerable || sleepBlocks(target, source, dmg)) return 0;
+  if (liftoffEvades(target, dmg.sourceless ? null : source, dmg)) return 0;
   if (burstLocked(target, el)) return 0;
   if (battle._hooks.elementHit) {
     battle.emit('elementHit', { source, target, dmg });