feedback7 dober: the Final Assault and the Hidden Core pay a 战术特训 card's perfect-battle coins, they paid kill coins only (PR #353 by @Sukvii); golden: unchanged

Seen: Match._settleBossBounties banked only the kill coins of the boss field (pp.coins). A perfect-payout bounty (a
战术特训 card, from the 杜宾 Art 教鞭) has its enemies spawned in the Final Assault / Hidden Core like any bounty with
battles left, and used a battle there, but its coins were never paid — SETTLE pays them after every normal battle.
Official: PRTS 杜宾 "<教鞭>：使用后为下场战斗添加额外敌人，若自身战斗完美作战可获得资金" and the cards' "若各自行动阶段就达成完美作战，获得N资金"
have no boss-battle exception. The condition is [ASSUMED]: the team won (the first end the server registered), the result
is a real one (not the synthetic stand-in of a field that never reported) and the player's own field let no counted enemy
through; paid once per player, spent in the Hidden Core's prep with the kill coins.
Now: _finishFinal reads the victory before the per-field loop and hands _settleBossBounties a `perfect` flag.
Tests: clientCombat.test.js (the held 'cleared' result pays once, a duplicate never twice; six eligibility cases:
team win / synthetic / own leak / uncounted leak / forced team defeat), followups.test.js (R14 -> R15 income and the Hidden
Core; a boss win with an own leak keeps the kill coins only). Both fail on the parent.
Golden: unchanged (matches: 18 scenarios match).

docs/BALANCE.md

@@ -393,7 +393,7 @@ heuristics CPU 36 / 88 → 35 / 86 ms and 16 / 40 → 16 / 40 ms.
 
 * Bounties with battles left (multi-round cards — "之后的每场作战" — last two battles since playtest #6, META §1.2)
   also spawn in the Final Assault / Hidden Core, on the owner's half (route to its goal), are shown in the boss-round
-  preview, and the boss battle uses up one of their battles (kill coins → pending funds for the Hidden Core prep).
+  preview, and the boss battle uses up one of their battles (kill coins, and a perfect-payout 战术特训 card's coins when the player's own field is perfect and the team wins → pending funds for the Hidden Core prep).
 * A 驰援 card is never offered when its bond has no chess left in the match's pool (every member banned).
 * docs/META.md §2.6 example guards `ctx.source.kind === 'choice'` (its EffectRef reuses the handler's key).
 * 坚若磐石 = least LP lost (`titles.comment_3 { stat: 'lpLost', rule: 'min' }` in tuning.json; results.js supports