新增: 云OSS存储集成（七牛云+阿里云）+多桶导航+GBK编码自动转换

internal/filesystem/encoding.go

@@ -0,0 +1,24 @@
+package filesystem
+
+import (
+	"bytes"
+	"io"
+	"unicode/utf8"
+
+	"golang.org/x/text/encoding/simplifiedchinese"
+	"golang.org/x/text/transform"
+)
+
+// BytesToString 智能编码转换：UTF-8 直接返回，否则尝试 GBK → UTF-8
+func BytesToString(data []byte) string {
+	if utf8.Valid(data) {
+		return string(data)
+	}
+	// 尝试 GBK 解码
+	reader := transform.NewReader(bytes.NewReader(data), simplifiedchinese.GBK.NewDecoder())
+	decoded, err := io.ReadAll(reader)
+	if err != nil || !utf8.Valid(decoded) {
+		return string(data) // 转换失败或结果无效，返回原始内容
+	}
+	return string(decoded)
+}