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/targeting.js

@@ -10,7 +10,7 @@
 // or not — ai.js acquireTargets), (2) profile priority (fly/lowDef/…),
 // (3) higher enemy taunt, (4) least remaining path distance to the goal, (5) earliest spawned. Air units
 // (Unit.isFlying: FLY, 近地悬浮, 浮空) need a profile that can hit them (`canHitFly`, never `groundOnly`). Enemy
-// priority: sortAllyTargets.
+// priority: sortAllyTargets. 起飞 (an ally's flag `liftoff`) = 对地规避: no ground enemy selects it (evadesGround).
 
 import { COLS, ROWS } from './constants.js';
 import { normDir, rotateOffset } from './dir.js';
@@ -73,16 +73,38 @@ export function canTargetEnemy(attacker, e, profile) {
  * "隐匿与'阻挡时解除'没有直接关系"). Devices are never targets (阻隔工事: obstacles nobody can select; “双眼皮”: 迷彩 and
  * off the enemy paths — PRTS). 迷彩 (flag `camou`, term ba.camou "不阻挡时不成为敌方普通攻击的目标") works the same way:
  * PRTS 异常效果 gives both anomalies the note "与'阻挡时解除'没有直接关系" [ASSUMED: enemy skills and splash selectors
- * treat 迷彩 like target selection — officially splash and selectors without a projectile ignore it].
+ * treat 迷彩 like target selection — officially splash and selectors without a projectile ignore it]. An airborne ally
+ * (起飞, flag `liftoff`) is never a target of a ground enemy (evadesGround).
  */
 export function canTargetAlly(e, a, ranged) {
   if (!a.alive || !a.deployed || a.hidden || a.kind === 'device') return false;
   const f = a.s.flags;
   if (f.untargetable || f.sleep) return false;
   if (ranged && (f.stealth || f.camou) && e.blockedBy !== a) return false;
+  if (f.liftoff && evadesGround(e, a)) return false;
   return true;
 }
 
+/**
+ * 对地规避 of an airborne ally (起飞, buff flag `liftoff` — 蒂比's skills): true when `src` is an enemy whose 行动方式 is
+ * ground, which then cannot select `a` (gamedata_const ba.liftoff "不阻挡地面敌人且不会被地面敌人攻击，可以阻挡飞行敌人";
+ * PRTS 术语释义 起飞 "包含对地规避（无法被不同阵营行动方式为地面的单位选中）"; PRTS 异常效果 MOTION_TARGET_FREE, a 无法选择
+ * effect that a selector whose 行动方式 is not ground ignores). Flyers, 近地悬浮 and 浮空 enemies (Unit.isFlying — PRTS
+ * 行动方式: a hovering unit "是真正的飞行单位", a levitated one is seen as a flyer) still select it; it stays a ground unit
+ * itself ("起飞的干员仍然是地面单位"), so they need no 对空 check. Used by every enemy selection (canTargetAlly), the damage
+ * pipeline and Battle.applyStatus (a ground enemy's area damage, statuses and hits under way skip it — 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"), and the content picks and one-shot areas that bypass canTargetAlly
+ * (chain / bounce jumps, 周围四格 additions, shells, barrages, 沙狱, death blasts). Not selections, so they still reach it:
+ * sourceless damage and DamageInfo / applyStatus `ignoreSelect` — abilities that "无视无法选择" (【污染秽蚀】, 【盲信之誓】,
+ * 萨卡兹悖谬暴虐兵长's 暴击 splash), direct picks (碎铳之簧's counter on its attacker: PRTS 异常效果 "'直接选中'的能力…不受这些
+ * 仅在选择时生效的异常效果制约"), the blasts of flying units credited to a ground leader (刺胄之弹, 斩胄之剑 / 破胄之锤) and
+ * the ticks of a debuff a ground enemy put on it before it took off (出血, 沙狱, burning DoTs, 【自然涌动】: a tick selects
+ * nobody). A shot already in flight is refused [ASSUMED] (damage.js).
+ */
+export function evadesGround(src, a) {
+  return !!(a && a.s && a.s.flags.liftoff && src && src.side === 'enemy' && !src.isFlying);
+}
+
 const PRIORITY_FNS = {
   fly: (e) => (e.isFlying ? 0 : 1),
   lowDef: (e) => e.s.def,