From ec8c3a8d02645ac32eb1a2cb6e005eccf7c72191 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BF=83=E9=9A=A8=E7=B7=A3=E5=8B=95?= <xeefei@gmail.com>
Date: Tue, 7 Oct 2025 23:33:33 +0800
Subject: [PATCH] New features: TG Telegram robot terminal [One-click
 configuration] and [Subscription conversion]

---
 util/common/random.go | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 util/common/random.go

diff --git a/util/common/random.go b/util/common/random.go
new file mode 100644
index 00000000..ccd35e91
--- /dev/null
+++ b/util/common/random.go
@@ -0,0 +1,18 @@
+package common
+
+import (
+	"crypto/rand"
+	"math/big"
+)
+
+// RandomInt 返回一个 0 .. max-1 之间的随机整数（使用 crypto/rand）
+func RandomInt(max int) int {
+	if max <= 0 {
+		return 0
+	}
+	n, err := rand.Int(rand.Reader, big.NewInt(int64(max)))
+	if err != nil {
+		return 0
+	}
+	return int(n.Int64())
+}