fix(赛马插件): 修复进度条对齐并显示积分余额

修复赛马进度条显示时中文字符宽度计算问题，使用全角空格进行对齐
在积分结算时异步获取并显示用户当前积分余额

danding_bot/plugins/group_horse_racing/race_engine.py

@@ -72,7 +72,9 @@ class RaceEngine:
             progress = min(horse.position / distance, 1.0)
             filled = int(progress * bar_width)
             bar = "█" * filled + "░" * (bar_width - filled)
-            pad = " " * (max_name_width - _display_width(horse.name))
+            # Pad with fullwidth spaces (1 fullwidth space = 2 columns = 1 CJK char width)
+            diff = max_name_width - _display_width(horse.name)
+            pad = "\u3000" * (diff // 2) + (" " if diff % 2 else "")
             lines.append(f"  {horse.index:02d}号 {horse.name}{pad} |{bar}| {horse.position:.1f}m")
 
         return "\n".join(lines)