feat(render): 干员入场、换位及回合开始时播放入场动画与落地音效

public/js/ui/fieldHost.js

@@ -19,7 +19,7 @@ const METHODS = ['setStage', 'setCamera', 'setPrep', 'enterBattle', 'pushSnapsho
 // direction-step hooks (ui/facingWheel.js): optional — the wheel falls back to the engine's dev hooks when absent;
 // setPen (enemy preview pen list), prepField ({ kind, side, mirror } of the Final Assault prep), stripesUnder (the view
 // stripes range previews under the units itself) — render/app.js; the DOM fallback lacks them (→ null)
-const OPTIONAL = ['pieceScreenRect', 'setSettings', 'off', 'tileScreen', 'holdPiece', 'setPieceDir', 'setPen', 'prepField', 'stripesUnder'];
+const OPTIONAL = ['pieceScreenRect', 'setSettings', 'off', 'tileScreen', 'holdPiece', 'setPieceDir', 'setPen', 'prepField', 'stripesUnder', 'deployPiece', 'deploySequence'];
 
 /**
  * Camera padding (px) that keeps the field clear of the DOM HUD (top bar + bond strip, team panel, shop bar /