feedback5: 乌尔比安 knocked out while his S3 has moved him lies and redeploys on his deployment tile, not on the anchor tile — the owner's decision of 2026-10-07 on community report 28 「乌尔比安3技能期间死亡会留在3技能位移后的位置复活，应回到初始部署位复活」, a deliberate deviation from PRTS's "where it fell" for this 【移动】 only; golden: unchanged (the corpus moves him 23 times and knocks him out 6 times, never while moved)

- server/sim/units.js `downAtHome` (false), cleared by every deployment (battle/deploy.js _deploy).
- kits/ops/chess_char_5_05-ulpia.js sets it once the S3 【移动】 has put him on the anchor tile; onEnd clears it when the
  skill ends with him standing (the 【返回】); knocked out, it stays for the body.
- sim/battle/tiles.js _layBody: a unit holding it lies on its home tile (his board placement, where the 从不混淆的方向
  stood) when that tile is in the rect and free — else where it fell [ASSUMED], the PRTS exception's one attempt; the
  timed redeploy, 不屈's and CB1's 复活 (M3茧甲 / 埃芒加德: at once, free) all come back there (restTile), b.snap
  `down` names it. Every other moved operator (a 突袭 jump, other kits' 【移动】) keeps "where it fell".
- Test: test/sim/feedback5-ulpia-revive-home.test.js (3) — knocked out during S3 he lies at home, the anchor tile free,
  and redeploys there; revived at home by M3茧甲; control: after the 【返回】 and for a 突袭 member the PRTS rule holds. The
  first two fail on the parent (he lay and stood up on (10,7)); the third fails there only on the missing field.
- Docs: DESIGN §25.17.3 (the decision, marked as the owner's deviation; the §25 intro's decisions of 2026-10-07),
  docs/SIM.md §1, DESIGN §5 (design/engine.md DP / knocked-out line), docs/PLAYING.md 作战 row.

Gate: non-browser suites 5024 / 5024, npm run golden ok, test/golden.test.js 9 / 9, lint 0 errors, check:imports ok,
typecheck ok.

docs/design/engine.md

@@ -118,7 +118,7 @@ Engine helpers (content must use these, never touch internals): `battle.dealDama
 ### 5.5 Combat rules (engine)
 
 - **Initial deployment** at t=0, free: operators by column — the left column first, top to bottom within a column (right-side boss player: from its own left, the highest field column) — then the summons (PRTS 卫戍协议/帮助 "按从上到下>从左到右的顺序部署。优先部署干员，随后为召唤物", read as a scan: down each column, the columns left to right — the order PRTS gives the 阿戈尔 devour, "更靠左和靠上"; row-major until 0.1.3, §23.23; `aggroSeq` ranks every start-of-battle summon after all operators) — a skill's placed summon (赫默 医疗探机, 巫恋 诅咒娃娃) included, once and free ("所有手动部署的召唤物，无视所属干员的持有状态…作战开始时立即部署一次"; afterwards it re-appears on its tile each time the owner's skill gives one, §20.1); on a shared field (联防, boss) the players' i-th operators deploy together [ASSUMED]. Deploy effects fire (`deploy` with `initial: true`). Then operators carried into 联防 knocked out (`carryState.down`) are forced out (`FORCED_EXIT`, HP 0, §19.3). Then `battleStart`, after which the forced-out operators' timers are re-read (redeploy-time effects that start with the battle, e.g. 机变 征召, cover them too).
-- **DP**: per player, start 10, +1/s, cap 99; used only for auto-redeploy (dead op: after `respawnTime`, if the tile it lies on is free and DP ≥ cost ⇒ redeploy there with full HP, SP = initSp). A knocked-out operator (and, since 0.1.2, one forced out by its own effects, §22.15) stays **down** on the tile it fell on — its own home when it fell on another board piece's home (that piece on the field or not) and its home is free — until it redeploys there, and no ally deploys or moves onto that tile meanwhile (PRTS 卫戍协议/帮助 §作战阶段 单位部署; `Battle.downOn` / `restTile` / `_layBody`, §21.24; b.snap `down`, §18.3: counting / waiting for DP / its tile taken, a safeguard) — also one that entered 联防 knocked out (`FORCED_EXIT`, its full redeploy timer — confirmed by the user — with the battle-start redeploy effects, §19.3); summons, devices and enemies leave at once.
+- **DP**: per player, start 10, +1/s, cap 99; used only for auto-redeploy (dead op: after `respawnTime`, if the tile it lies on is free and DP ≥ cost ⇒ redeploy there with full HP, SP = initSp). A knocked-out operator (and, since 0.1.2, one forced out by its own effects, §22.15) stays **down** on the tile it fell on — its own home when it fell on another board piece's home (that piece on the field or not) and its home is free, and 乌尔比安 knocked out while his S3 has moved him always on his deployment tile when it is free (the owner's deviation of 2026-10-07, `Unit.downAtHome`, §25.17.3) — until it redeploys there, and no ally deploys or moves onto that tile meanwhile (PRTS 卫戍协议/帮助 §作战阶段 单位部署; `Battle.downOn` / `restTile` / `_layBody`, §21.24; b.snap `down`, §18.3: counting / waiting for DP / its tile taken, a safeguard) — also one that entered 联防 knocked out (`FORCED_EXIT`, its full redeploy timer — confirmed by the user — with the battle-start redeploy effects, §19.3); summons, devices and enemies leave at once.
 - **Blocking** (contact radius, PRTS 游戏数据基础 §阻挡半径 / 作战机制 "中点判定…案例：阻挡"; `constants.js BLOCK_RADIUS`, `Battle._checkBlock`, §19.2): an operator with free capacity blocks an unblocked, blockable enemy whose position lies within its block radius of its centre — ground 0.7071 (squared 0.49999037), 0.8944 × the blocker's 阻挡半径倍率 for blockFly units vs flyers (起飞; mod `blockRadiusScale` = 倍率 − 1 — PRTS 游戏数据基础 "飞行阻挡半径 = 0.8944 × 阻挡半径倍率", 凯尔希·思衡托 +0.23), devices 0.4472 (阻隔工事 / 障碍物); air units (FLY, 近地悬浮, 浮空) only by blockFly units. A ground enemy is never blocked by a unit standing on a tile ground units cannot pass (围墙 / 围栏: PRTS 地形机制 "部署在其中的单位，若当前阻挡类型为'地面阻挡'则无法阻挡敌人" — an enemy pushed or pulled against the fence walks on; air blocking there stays [ASSUMED], §21.23) nor by an airborne (起飞) unit, which blocks flyers only (§21.22). An enemy holding 不可阻挡 (PRTS 异常效果 BLOCK_FREE 「无法阻挡/被阻挡，自动解除阻挡」) — `unblockable` (恐惧, 诱导, enemy abilities), 浮空, and 沉睡 (SLEEPING = 无法行动+无敌+不可阻挡) — is never blocked and is released at once: a sleeping enemy frees its blocker's slot, stays where it is and, once awake, is blocked again only by a blocker with room (§24.9). The nearest such operator wins (ties: scan order [ASSUMED]). It is re-checked every tick, moving or not, so another operator in contact with room takes the enemy over when its blocker dies, is withdrawn or is stunned, and an operator whose capacity frees up grabs an overlapping enemy; one that finds no room walks on. A head-on enemy stops at contact (≈ 0.71 tile), outside the blocker's tile. Enemy uses `blockCnt` capacity (default 1). Blocked enemies stop moving and attack their blocker if melee (or anyone in range if ranged, blocker first). **Every blocker** — melee units (重装要塞 / 领主 / 哨戒铁卫 included), summons and a ranged operator on a melee tile alike — whose attack hits enemies may always target the enemies it blocks, in range or not, whatever its facing, and targets them first ("可以选择且优先选择阻挡单位", PRTS 选择器; the user's rule after playtest #6, "阻挡了就一定要能打到": officially the collision pushes a blocked enemy to its blocker's front; `Battle.blockedTargets`, `targeting.js sortEnemyTargets`; §20.3 — it replaces the playtest #5 QA's melee-only restriction of §19.2). A healer (dmgType `heal`, or a skill attack turned into a heal) selects injured allies only and keeps healing while it blocks (PRTS 卫戍协议/帮助 "对于医疗干员（咒愈师分支除外），攻击目标为需要治疗的单位"; §21.17); 咒愈师 follow the blocker rule. The huge leaders are 自缚 + unblockable (§7).
 - **Operator attacks**: every `interval` s if a valid target exists; targets = up to `maxTargets` (default 1) from `unitsInGrid(rangeGrid)` (a `rangeAoe` profile — 阵法术师, 轰击术师 — takes every selectable enemy in range, §21.18; 「同时攻击阻挡的所有敌人」 — 强攻手 / 重剑手 / 推击手 and the skills worded so, `hitAllBlocked` — up to the block count, never fewer than 1, since 0.2.0: PRTS 分支特性信息 "普通攻击最大目标数等于阻挡数（不会低于1）"), priority: (1) the enemies it blocks (every blocker, in range or not, §20.3), (2) profession/trait priorities (e.g. fly-first snipers, `trait` text parsed by build-data into `targetPriority`), (3) enemy with the **least remaining path distance** to its goal, ties → earliest spawned. Melee (no ranged trait) and ground-only attacks cannot hit air units (`Unit.isFlying`: FLY, or a 近地悬浮 / 浮空 enemy — PRTS "算作空中单位", §19.1). Stealthed enemies can't be targeted unless blocked or revealed — or within 3 s of a block's end (§22.8). Ranged ops fire projectiles (speed ~12 tiles/s, instant for melee/arts-beam classes as data indicates); damage applies on impact; a 锁定攻击范围 AoE (`rangeAoe`) strikes every selectable enemy on its range at once with instant hits (§21.18).
 - **Healers** (`dmgType heal`): target the ally in range with the lowest HP% below 100%, never a 禁疗 / 孤立 unit (tokens.json `abnormal`, `noHeal`; §20.3; 史尔特尔 during 余烬, §22.7), and never the enemies they block — also while blocking (§21.17); do nothing otherwise (SP still regenerates).