0.2.6-dev: port PR #416 by Cromemadnd — at every round start the own board's pieces replay their Start clip and landing sound one after another in deployment order (the maintainer's confirmation from official play, 2026-10-13), and a purchase or a move onto / across the board plays them too ([ASSUMED], the PR author's account); one sound per landing, idle prep pieces only, the round marked once the view took the sequence, own board only, timers cleared when prep mode ends and on destroy; DESIGN §31.8; golden: unchanged

public/js/ui/fieldHost.js

@@ -18,8 +18,9 @@ const LOAD_TIMEOUT_MS = 12000;
 const METHODS = ['setStage', 'setCamera', 'setPrep', 'enterBattle', 'pushSnapshot', 'pushEvents', 'highlightTiles', 'on', 'resize', 'destroy'];
 // 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'];
+// stripes range previews under the units itself), replayDeploys (the round start's Start-clip replay, PR #416) —
+// render/app.js; the DOM fallback lacks them (→ null)
+const OPTIONAL = ['pieceScreenRect', 'setSettings', 'off', 'tileScreen', 'holdPiece', 'setPieceDir', 'setPen', 'prepField', 'stripesUnder', 'replayDeploys'];
 
 /**
  * Camera padding (px) that keeps the field clear of the DOM HUD (top bar + bond strip, team panel, shop bar /

public/js/ui/gameLogic.js

@@ -27,7 +27,7 @@
 export { clamp, tileKey } from './gameLogic/shared.js';
 export { phaseMode, isCombatPhase, showDeadPill, isBossPhase } from './gameLogic/phases.js';
 export { prepCamera, prepCameraFor, foldCamera, deployFieldOf, fieldTile, boardTileOf, ownerBandId, teamFrameIds } from './gameLogic/camera.js';
-export { phaseBanner, prepCapsuleLabel, countdownState, phaseTotalSeconds } from './gameLogic/phases.js';
+export { phaseBanner, prepCapsuleLabel, countdownState, phaseTotalSeconds, deployOrder, roundStartReplay } from './gameLogic/phases.js';
 export { RESULT_BOX_MS, ownRoundLoss, battleOverSfx, roundResultBox, uniteResultBox, battleResultBox } from './gameLogic/phases.js';
 export { STATUS_META } from './gameLogic/format.js';
 export { sortedPlayers } from './gameLogic/shared.js';

public/js/ui/gameLogic/phases.js

@@ -1,5 +1,5 @@
-// ui/gameLogic/phases.js — phase families, banners, the round's result box and 战斗结束 sound, countdowns. Re-exported
-// from ../gameLogic.js.
+// ui/gameLogic/phases.js — phase families, banners, the round's result box and 战斗结束 sound, countdowns, the round
+// start's deploy replay. Re-exported from ../gameLogic.js.
 
 import { PHASE } from '../../../../shared/constants.js';
 import { bossLevelSeconds } from '../matchStatus.js';
@@ -177,6 +177,41 @@ export function prepCapsuleLabel(phase) {
   return t('休息一下');
 }
 
+// ---- the round start's deploy replay (PR #416) ---------------------------------------------------------------
+
+/**
+ * The own board's pieces in deployment order — the order the battle deploys them (sim Battle.start; 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"): the operators by column from the left, top to bottom within a
+ * column (col asc, row desc, in board coordinates — so the mirrored right half of a boss prep also starts from its own
+ * left), then the summons the same way. A placed item (画卷) is not one of them.
+ * @param {any[]|null|undefined} board m.private board
+ * @returns {number[]} uids
+ */
+export function deployOrder(board) {
+  const rank = (p) => (p.kind === 'chess' ? 0 : 1);
+  return (Array.isArray(board) ? board : [])
+    .filter((p) => isObj(p) && Number.isInteger(p.uid) && Number.isInteger(p.row) && Number.isInteger(p.col) && (p.kind === 'chess' || p.kind === 'token'))
+    .sort((a, b) => rank(a) - rank(b) || a.col - b.col || b.row - a.row || a.uid - b.uid)
+    .map((p) => p.uid);
+}
+
+/**
+ * Whether the round start's replay is due and which pieces play it (PR #416 by @Cromemadnd; the maintainer's confirmation
+ * from official play, 2026-10-13: at the start of every round the operators on the board replay their Start clip and
+ * landing sound one after another in deployment order). Due once per round, during 回合开始, on the viewer's own board —
+ * never a scouted or watched teammate's board, a spectator seat or an eliminated player — while it holds pieces.
+ * `replayed` is the round the screen last scheduled: the screen marks a round only once the field view took the sequence
+ * (render/app.js replayDeploys found the pieces), so a view or a board not built yet is asked again on the next render of
+ * the phase, and a reconnect or a re-render of the same round replays nothing.
+ * @param {{ phase?: string|null, round?: number|null, replayed?: number|null, ownBoard?: boolean, board?: any[]|null }} [s]
+ * @returns {{ round: number, uids: number[] } | null}
+ */
+export function roundStartReplay({ phase = null, round = null, replayed = null, ownBoard = false, board = null } = {}) {
+  if (phase !== PHASE.ROUND_START || !Number.isInteger(round) || round === replayed || !ownBoard) return null;
+  const uids = deployOrder(board);
+  return uids.length ? { round, uids } : null;
+}
+
 // ---- countdown -------------------------------------------------------------------------------------
 
 /**