0.2.5-dev: an optional 「官方伤害数字」 setting (default off) shows only the numbers the official game shows per the PRTS red-number rule (#412, the owner's decision of 2026-10-12); a small link to the project's GitHub repository on the title page (#543); golden: unchanged

docs/design/client.md

@@ -170,3 +170,9 @@ the actor returns to base/skill idle. Late operator events still start at the st
 
 Connection recovery sits above the AI-away overlay and below global modals (§30.8), so a replaced session can
 be reclaimed by pointer while away. This does not change the stacking behavior of modals nested inside a screen.
+
+§30.17: 设置 →「官方伤害数字」 defaults off. Off, damage numbers stay the typed every-hit popups. On, and only
+while 「显示伤害数字」 is also on, the field draws a red integer for a `dmg` tuple marked `'r'` and a yellow MISS
+for a dodge fx whose payload is `num: 'm'` (PRTS 作战机制 「伤害红字（暴击）」). Ordinary hits and heals draw no
+digits in that mode. The mark is computed in the sim; the random offset above the model is client-side. The
+simplified board uses the same mark with a fixed slot. The title footer links the project repository in a new tab.