feedback5 WAC: players rebind the in-match shortcuts in 设置 → 快捷键 (community request 「快捷键可不可以自己设置」, the owner's decision of 2026-10-07)

- The settings (sp.pref.settings) hold a key map, action → KeyboardEvent.code, for refresh / freeze / level-up /
  retreat / sell / ready (the ready key also pauses a solo battle); the defaults are the 0.1.4 keys R F D Q X Space,
  so nothing changes for a player who never opens the section. sanitizeSettings keeps each saved key that may be a
  shortcut and gives any other its default; not a map, or two actions on one key, gives the defaults.
- One lookup, actionForKey (the character typed first, then the physical key: the 0.1.4 code-or-key match, identical
  for the defaults), serves shortcutFor(e, keys) in game.js and the facing wheel; the modifier, text-field, repeat and
  overlay guards are unchanged. The shop bar, ready / pause and underframe key hints read the map.
- 设置 → 快捷键 (the one SettingsModal, in a match and on the title screen): each action with its key; click or Enter
  waits, the next key binds; Esc cancels (the dialog stays open), Tab leaves; Ctrl / Alt / ⌘ combinations and the
  interface keys (Esc, Tab, Enter, arrows, F1–F12) are refused; a key in use is swapped and the line under the list
  names both; 恢复默认. Esc stays fixed. Touch-only devices: a keyboard note and a folded list; one column under 768 px.
- Tests: test/ui/feedback5-hotkeys.test.js (map, sanitising, conflicts, lookup, capture, handlers and hints with a
  rebound key), test/ui/gameLogic.test.js (sanitizeSettings now returns keys), test/ui/hotkeys.e2e.test.js (SP_E2E=1:
  撤退 rebound to W with the keyboard only in the mock match; phone width).

Golden unchanged (client UI only).

public/js/ui/hud.js

@@ -31,6 +31,7 @@ import { localAsset } from '../data.js';
 import { serverNow } from '../store.js';
 import { isCombatPhase, isBossPhase, prepCapsuleLabel, bossFrac, bossPctText, fmtNum, shopBlockReason } from './gameLogic.js';
 import { overtimeState, overtimeDrainPerSec, remainAt } from './matchStatus.js';
+import { hotkeyLabelOf } from './settings.js';
 import { t, tParts, N_ } from '../../../shared/i18n.js';
 
 const cx = (...p) => p.flat().filter(Boolean).join(' ');
@@ -218,7 +219,7 @@ export function ReadyToggle({ priv, onToggle, busy, readyCount, total }) {
       aria-pressed=${ready ? 'true' : 'false'} aria-describedby=${!ready && temp.count ? 'readywrap-why' : undefined} onClick=${() => onToggle(!ready)}>
     <span class="readybtn__box">${ready ? html`<${Icon} name="check" />` : null}</span>
     <span class="readybtn__label">${ready ? t('取消准备') : t('准备就绪')}</span>
-    <kbd class="readybtn__key">Space</kbd>
+    <kbd class="readybtn__key">${hotkeyLabelOf('ready')}</kbd>
   </button>`;
   return html`<div class="readywrap">
     ${reason ? html`<${Tooltip} text=${reason} placement="bottom">${btn}<//>` : btn}
@@ -290,7 +291,8 @@ function PauseGlyph() {
  */
 export function PauseButton({ paused, busy = false, onToggle }) {
   const label = paused ? t('继续作战') : t('暂停');
-  return html`<${Tooltip} text=${paused ? t('继续作战（Space）') : t('暂停作战（Space）')} placement="bottom">
+  const key = hotkeyLabelOf('ready'); // the ready key pauses a solo battle (Space unless rebound: 设置 → 快捷键)
+  return html`<${Tooltip} text=${paused ? t('继续作战（{key}）', { key }) : t('暂停作战（{key}）', { key })} placement="bottom">
     <button type="button" class=${cx('pausebtn', 'tapx', paused && 'is-on', busy && 'is-busy')} aria-pressed=${paused ? 'true' : 'false'}
         aria-label=${label} disabled=${busy} data-testid="pause" onClick=${() => onToggle?.()}>
       ${paused ? html`<${Icon} name="play" class="pausebtn__glyph" />` : html`<${PauseGlyph} />`}