feedback5 WG: 补位 in the browser — the 干员持有 tab next to 干员调配 (the 53 NORMAL chess by tier, operator → stand-in, a switch each, 全部持有, export / import, localStorage + room.ownership through the shared sync engine), 「替补：X」 on shop / reward cards and own prep pieces, the stand-in's model on the board, its body on the detail card (own pieces, cards, any unit with standInFor), placement and ranges by the stand-in

public/css/screens/game-shop.css

@@ -130,6 +130,9 @@
 .scard__class { display: flex; align-items: center; gap: .05rem; font-size: .13rem; color: var(--text-lo); }
 .scard__prof { width: .18rem; height: .18rem; object-fit: contain; opacity: .85; }
 .scard__mergetag { position: absolute; z-index: 3; right: 0; top: .38rem; font-size: .12rem; font-weight: 700; padding: .01rem .06rem; background: var(--gold); color: #1d1400; letter-spacing: .08em; }
+/* 0.2.0 补位: a chess the player does not own — its card stays, the stand-in fights (ui/shopBar.js ChessCard) */
+.scard__standin { position: absolute; z-index: 3; left: 0; top: .38rem; max-width: calc(100% - .1rem); font-size: .12rem; font-weight: 700; padding: .01rem .06rem;
+  background: var(--ice); color: var(--ice-900); letter-spacing: .04em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; box-shadow: 0 1px 3px rgba(0, 0, 0, .6); }
 .scard:not(.is-disabled):not(.scard--sold):hover { transform: translateY(-.08rem); border-color: var(--mint-400); box-shadow: 0 0 0 1px var(--mint-400), 0 .1rem .24rem rgba(23, 249, 183, .22); }
 .scard:not(.is-disabled):not(.scard--sold):active { transform: translateY(-.04rem); }
 .scard.is-disabled { cursor: not-allowed; }