feat: 添加勇者指令和字符串格式化工具

common/utils/help.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"math/rand/v2"
+	"strings"
 	"time"
 
 	"github.com/gogf/gf/v2/os/gtime"
@@ -167,3 +168,12 @@ func IsCurrentTimeInRange(startStr, endStr string) (bool, error) {
 	// 3. 比较当前时间是否在 [startToday, endToday] 区间内
 	return now.After(startToday) && now.Before(endToday), nil
 }
+
+// Format 把 args 按顺序填入 {0},{1},{2}...
+func Format(s string, args ...interface{}) string {
+	for i, arg := range args {
+		placeholder := "{" + string(rune('0'+i)) + "}"
+		s = strings.ReplaceAll(s, placeholder, gconv.String(arg))
+	}
+	return s
+}