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/gameLogic/settings.js

@@ -1,17 +1,20 @@
 // ui/gameLogic/settings.js — settings defaults and sanitising. Re-exported from ../gameLogic.js.
 
 import { clamp, isObj } from './shared.js';
+import { DEFAULT_HOTKEYS, sanitizeHotkeys } from './shortcuts.js';
 
 
 // ---- settings ------------------------------------------------------------------------------------------------------
 
-export const DEFAULT_SETTINGS = Object.freeze({ bgm: 0.6, sfx: 0.8, voice: 0.8, muted: false, damageNumbers: true, quality: 'high' });
+/** keys: the in-match shortcuts' key map (ui/gameLogic/shortcuts.js; settings → 快捷键). */
+export const DEFAULT_SETTINGS = Object.freeze({ bgm: 0.6, sfx: 0.8, voice: 0.8, muted: false, damageNumbers: true, quality: 'high', keys: DEFAULT_HOTKEYS });
 const QUALITIES = ['high', 'medium', 'low'];
 
 /**
  * Sanitize persisted settings.
  * @param {any} raw
- * @returns {{ bgm: number, sfx: number, voice: number, muted: boolean, damageNumbers: boolean, quality: 'high'|'medium'|'low' }}
+ * @returns {{ bgm: number, sfx: number, voice: number, muted: boolean, damageNumbers: boolean, quality: 'high'|'medium'|'low',
+ *   keys: Record<'refresh'|'freeze'|'levelUp'|'retreat'|'sell'|'ready', string> }}
  */
 export function sanitizeSettings(raw) {
   const r = isObj(raw) ? raw : {};
@@ -23,5 +26,6 @@ export function sanitizeSettings(raw) {
     muted: typeof r.muted === 'boolean' ? r.muted : DEFAULT_SETTINGS.muted,
     damageNumbers: typeof r.damageNumbers === 'boolean' ? r.damageNumbers : DEFAULT_SETTINGS.damageNumbers,
     quality: QUALITIES.includes(r.quality) ? r.quality : DEFAULT_SETTINGS.quality,
+    keys: sanitizeHotkeys(r.keys),
   };
 }