feedback5 WAC: docs for the rebindable shortcuts — PLAYING §11 (the shortcut list and how to change it), README 操作 (Q / X added, the settings named), DESIGN §10 (design/client.md), §25.15, I18N's stale hotkey-line example

Golden unchanged (docs only).

docs/I18N.md

@@ -76,8 +76,8 @@ the official EN terms of the game (the EN client's own wording, e.g. its tips an
   `x.length` → `n`, else its position), nested strings in params included; adds the import. Module-level literals get
   `N_()` and are listed for a manual `t()` where they are shown; compared literals, object keys, string-method
   arguments, `console.*` and `Error` messages are left alone; a text run with a child that is not a plain value is split
-  into its static pieces. **Review the diff**: join fragments into whole sentences where it reads better (the settings
-  hotkey line is an example), check module-level tables.
+  into its static pieces. **Review the diff**: join fragments into whole sentences where it reads better (the settings'
+  one-line hotkey hint, before the 快捷键 section replaced it, was an example), check module-level tables.
 - `seed --from <map.json> [--all] [--write]` — fills `en.json` from a flat `{ msgid: English }` map for the msgids the
   code uses (`--all`: also the literals not wrapped yet, under the msgid the codemod will give them).