feedback1f WU: units on fenced tiles block no ground enemy (F4: 深巡 on a 围墙 tile attacks as usual)

F4 "干员深巡放在围栏围着的地块里不会主动攻击" is not reproduced: 深巡 (哨戒铁卫, range 2-2) attacks every
enemy on her range tiles from the fenced 围墙 tiles of every active stage, the Final Assault halves and
联防, through a real Match and in the browser's own battle. Locked by test/sim/feedback1f-fence.test.js.

Nearby rule fixed: PRTS 围墙 / 围栏 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".
A unit on a tile ground units cannot pass now blocks no ground enemy (Battle._blockerFor); before, an
enemy pushed or dragged to the fence edge (0.5 from the unit) was blocked there - 薄绿 S2 on a fenced
tile held the dragged enemies. Air blocking (blockFly against flyers) stays. Docs: SIM.md Blocking,
PLAYING.md tip on the fenced tiles.

docs/PLAYING.md

@@ -132,3 +132,4 @@
 - 进入隐秘核心看的是全队的**激活层数总和**：后期可以针对性地堆层数。
 - 层数到 999 就满了，多余的叠层没有用，可以把资源转去别的盟约。
 - 领袖战注意**限伤**：单次 30 万以上的伤害会被整次作废。盟约叠到 999 层后，再叠加额外的伤害倍率（例如 999 层谢拉格再点亮奥术）反而可能让大招打出 0 伤害；队友的奥术等减益也会放大你的伤害。
+- **橙色围栏围起的地块**（官方「围墙」）可以部署干员，敌人走不进去：站在里面的干员照常攻击自己攻击范围内的敌人（摆放时选好朝向，让攻击范围对着敌人走的路），但**挡不住地面敌人**（被推、拉到围栏边的敌人也不会被它阻挡），也很少挨打——重装干员（如深巡）的手动技能要受到伤害才释放，在里面可能一直不放；只打自己脚下一格的干员（如角峰）在里面打不到任何敌人。

docs/SIM.md

@@ -176,12 +176,17 @@ to a new pick. A `wait` leg keeps counting; when the fear ends the route re-plan
 user playtest #5 item 4): an unblocked, blockable enemy is blocked by an ally (or device) whose centre is within its
 block radius of the enemy's position — `constants.js BLOCK_RADIUS`: ground 0.7071 (compared as d² < 0.49999037, the
 tile's circumscribed circle), air 0.8944 (blockFly units against flyers), devices 0.4472 — while that blocker has free
-capacity for the enemy's `blockWeight` (data `blockCnt`). It is checked every tick for every unblocked enemy, moving or
-not: an enemy that overlaps an operator when its blocker dies / is withdrawn / is stunned, or when the operator's
-blocked enemy dies, is taken over at once; an enemy that finds no room walks on (pass-through). Several blockers in
-contact → the nearest [ASSUMED]. A head-on enemy therefore stops at contact, ~0.71 tile from the blocker's centre, on the
-tile in front of it (PRTS 作战机制: a blocked enemy's collider does not enter the blocker's tile; the official few
-hundredths of a tile of deceleration are not modelled), and **every blocker** — melee units (要塞 / 领主 / 哨戒铁卫
+capacity for the enemy's `blockWeight` (data `blockCnt`). A unit standing on a tile ground units cannot pass — the
+fenced 围墙 / 围栏 tiles (`b`: low, deployable, flyers only) — blocks no ground enemy (PRTS 围墙 / 围栏 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"; `Battle._blockerFor`): nothing walks onto those tiles, but a push or
+pull leaves an enemy at the fence edge, 0.5 from the unit — it walks on (community report F4 after 0.1.0: 薄绿 S2 on a
+fenced tile held the dragged enemies there; test/sim/feedback1f-fence.test.js); air blocking (blockFly against flyers)
+stays; a unit on a fenced tile still attacks whatever stands on its range tiles. It is checked every tick for every
+unblocked enemy, moving or not: an enemy that overlaps an operator when its blocker dies / is withdrawn / is stunned,
+or when the operator's blocked enemy dies, is taken over at once; an enemy that finds no room walks on (pass-through).
+Several blockers in contact → the nearest [ASSUMED]. A head-on enemy therefore stops at contact, ~0.71 tile from the
+blocker's centre, on the tile in front of it (PRTS 作战机制: a blocked enemy's collider does not enter the blocker's
+tile; the official few hundredths of a tile of deceleration are not modelled), and **every blocker** — melee units (要塞 / 领主 / 哨戒铁卫
 included), summons (流形's melee copy) and a ranged operator standing on a melee tile alike — 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