fix: 高延迟下连按「刷新」只发送一次请求（GitHub #501）

public/js/screens/game.js

@@ -84,7 +84,7 @@ import { CombatHud } from '../ui/combatHud.js';
 import { SettingsModal, settingsStore } from '../ui/settings.js';
 import { ExitModal, AwayOverlay, awayStore } from '../ui/matchChrome.js';
 import { openGuide } from '../ui/guide.js';
-import { actions } from '../ui/gameActions.js';
+import { actions, onRefreshBusy } from '../ui/gameActions.js';
 import { FacingWheel, holdPiece, setPieceDir, syncPieceDirs, showRange, useTileScreen } from '../ui/facingWheel.js';
 import { Underframe, underframeRect, TempRowNotice } from '../ui/underframe.js';
 import { StandInTags } from './game/standInTags.js';
@@ -183,6 +183,10 @@ function MatchScreen() {
   // deals duplicates) carry the same chess id and no piece, and each must say its 选中干员 (detailPanel selectVoiceKey)
   const cardTap = useRef(0);
   const [collapsed, setCollapsed] = useState(false);
+  // GitHub #501: a g.refresh is still waiting for its reply — the shop's 刷新 button dims while it is (gameActions.js
+  // single-flights the intent; the R hotkey is dropped by the same guard)
+  const [refreshBusy, setRefreshBusy] = useState(false);
+  useEffect(() => onRefreshBusy(setRefreshBusy), []);
   const [rewardMin, setRewardMin] = useState(false);
   const [emoteOpen, setEmoteOpen] = useState(false);
   const [settingsOpen, setSettingsOpen] = useState(false);
@@ -1468,7 +1472,7 @@ function MatchScreen() {
         ${spectator ? null : html`<${Button} size="sm" variant="primary" icon="back" onClick=${() => watchPlayer({ playerId: myId })}>${t('返回自己')}<//>`}
       </div>` : null}
 
-      ${showShop ? html`<${ShopBar} priv=${priv} editable=${editable} collapsed=${collapsed} onCollapse=${setCollapsed}
+      ${showShop ? html`<${ShopBar} priv=${priv} editable=${editable} collapsed=${collapsed} refreshBusy=${refreshBusy} onCollapse=${setCollapsed}
         barRef=${barRef} offBonds=${offBonds}
         onBuy=${buy} onLevel=${() => actions.levelUp()} onRefresh=${() => actions.refresh()} onFreeze=${() => actions.freeze()}
         onDetail=${(id, kind, hint) => setDetail({ kind: kind === 'item' ? 'item' : 'chess', id, hint: hint || null, tap: ++cardTap.current })}