feedback1 gaps: the client-result layer bound counts the lineup's layer traits

With the bots' new band picks the full-match suite's coop/FUNNY/107
reached a 6-谢拉格 freeze board at R12 whose honest +112 谢拉格 layers passed
the flat 60 + 4*round = 108, so the server rejected the client and
re-simulated (SP_VERIFY=all agrees with the client on all 57 battles).

validateClientResult now adds, per bond, what the player's IN_BATTLE layer
traits can add to it: each trait of its units and each one their ADD_BOND
traits hand out (once per operator), up to the per-battle cap the sim
applies; a trait without a cap, or a 魔王, leaves the bond bounded only by
the room under 999. Other bonds keep the flat bound. DESIGN §14 / §20.12 /
§21.26, META and the CHANGELOG say so; tests pin the R12 board and the
capped, handed-out and 魔王 cases.

docs/META.md

@@ -555,7 +555,9 @@ Any `choice:` handler whose EffectRef reuses its own key must guard like this (o
   `layerGainRoom` — `PlayerState.addLayers` (all prep-side gains: 特质, items, bands, 机变 cards, bonds; `ctx.addLayers`),
   the SETTLE of the in-battle gains and the battle's own live copy (`Battle.addLayers`, SIM.md §6); a gain at the cap
   adds 0 and dispatches no onLayers. The client-result check bounds a reported gain by the room left from the bond's
-  starting layers (`fields.js validateClientResult`, 'layer bound'); `invariants.js` flags a bond above the cap. The
+  starting layers and by 60 + 4·round plus what the player's IN_BATTLE layer 特质 can add to that bond (their per-battle
+  caps; an uncapped trait leaves only the room — `fields.js layerAllowanceOf`, DESIGN §21.26) (`validateClientResult`,
+  'layer bound'); `invariants.js` flags a bond above the cap. The
   bond strip, its popup, the effect text and the detail card show the server's capped count. The dev tools' direct
   writes (`tools/matchrun.mjs --layers N`, `tools/balance.mjs applyBoard`) stop at the cap too.
 * **Waves**: waves.js header (stage/factions/boss per match, faction replacement per round with `k` copies, scaling by