fix(race): 代码质量审查修复 + commands包拆分 + 赛马取消命令

- P1: bet.py赔率计算移入锁内防竞态
- P1: config.py TESTERS解析失败添加warning日志
- P2: 新增赛马取消命令(积分退还/任务取消/状态重置)
- P3: bet.py清理未使用的_send_to_scope导入
- 将commands.py拆分为commands/包(access/bet/help/race/register)
- OpenSpec变更提案: fix-race-conditions-and-logs

danding_bot/plugins/group_horse_racing/commands/register.py

@@ -0,0 +1,74 @@
+import asyncio
+from nonebot import on_command
+from nonebot.adapters.onebot.v11 import Bot, Event
+from . import (
+    room_store, race_engine, config, logger,
+    get_scope, check_access, get_event_id,
+    _find_user_horse, _find_duplicate_horse, _get_horses_in_order,
+    _format_horse_label, _send_to_scope, _build_race_image_message,
+    run_race_with_settlement,
+)
+from ..models import HorseState, RoomState
+
+@register_cmd.handle()
+async def handle_register(bot: Bot, event: Event):
+    """Handle horse registration."""
+    if not await check_access(bot, event):
+        await register_cmd.finish("无权限访问此功能")
+        return
+
+    msg = str(event.get_message()).strip()
+    parts = msg.split(None, 1)
+    user_id = get_event_id(event)
+    horse_name = _normalize_horse_name(parts[1]) if len(parts) > 1 else await room_store.get_last_horse_name(user_id) or ""
+
+    if not horse_name:
+        scope = get_scope(event)
+        horse_name = await _get_user_name(bot, scope, user_id)
+        # Ensure name is not too long when using nickname as default
+        if len(horse_name) > 10:
+            horse_name = horse_name[:10]
+
+    if len(horse_name) > 10:
+        await register_cmd.finish("马匹名不能超过10个字符")
+        return
+
+    scope = get_scope(event)
+    lock = room_store.get_lock(scope)
+
+    async with lock:
+        room = room_store.get_room(scope)
+        if not room:
+            room = await room_store.create_room(scope)
+
+        if room.state != RoomState.WAITING:
+            await register_cmd.finish("比赛正在进行中，无法报名")
+            return
+
+        if len(room.horses) >= 8:
+            await register_cmd.finish("房间已满（最多8匹马）")
+            return
+
+        duplicate_horse = _find_duplicate_horse(room, horse_name)
+        if duplicate_horse:
+            await register_cmd.finish(f"马匹名 \"{horse_name}\" 已被 {_format_horse_label(duplicate_horse)} 使用")
+            return
+
+        existing_user_horse = _find_user_horse(room, user_id)
+        if existing_user_horse:
+            await register_cmd.finish(f"你已经报名了，当前马匹为 {_format_horse_label(existing_user_horse)}")
+            return
+
+        horse_index = room.next_horse_index
+        room.next_horse_index += 1
+        room.horses[horse_name] = Horse(owner_id=user_id, name=horse_name, index=horse_index)
+        await room_store.set_last_horse_name(user_id, horse_name)
+
+    count = len(room.horses)
+    registered_horse = room.horses[horse_name]
+    await register_cmd.finish(f"报名成功！{_format_horse_label(registered_horse)} 已加入比赛（{count}/8）")
+
+
+cancel_cmd = on_command("赛马取消报名", priority=5)
+
+