feat(csmanualentry): 手动录单支持收号出号分组

- 录单记录新增组别（收号/出号），唯一约束放宽为编号+组别，同一编号两组各可登记一次
- 操作人选项支持组别标记，录单选中后自动带出组别
- 列表新增组别列与筛选，今日统计按收号/出号分列

backend/internal/modules/csmanualentry/errors.go

@@ -6,6 +6,7 @@ var (
 	ErrDependencyUnavailable = errors.New("dependency unavailable")
 	ErrEntryNoExists         = errors.New("manual entry number already exists")
 	ErrEntryNoInvalid        = errors.New("entry number is invalid")
+	ErrEntryGroupInvalid     = errors.New("entry group is invalid")
 	ErrEntryNotFound         = errors.New("manual entry not found")
 	ErrAdminNotFound         = errors.New("admin not found")
 	ErrOptionTypeInvalid     = errors.New("manual entry option type is invalid")