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.

test/content/kits_t1t2.test.js

@@ -962,7 +962,8 @@ test('2_13 蒂比: an incoming attack triggers 紧急赶场通知 and is dodged;
   assert.equal(h.hooksOf('skillStart').find((c) => c.unit === u).reason, 'TAKE_DAMAGE');
   assert.equal(u.stats.taken, 0, 'the triggering hit was dodged');
   approx(u.s.atk, u.base.atk * (1 + bb.atk));
-  assert.equal(u.ground, false);
+  assert.equal(u.s.flags.liftoff, true, 'airborne (起飞)');
+  assert.equal(u.ground, true, 'still a ground unit on her low tile');
   h.step();
   assert.equal(e.blockedBy, null, 'airborne: ground enemies are released');
   const fl = h.spawn('f', { pos: [9, 5] });