Refactor subscription handling by removing SubConfig model, updating BuildSub function to use ConvertConfig, and enhancing Base64 decoding across parsers. Update routes and frontend to support new configuration format.

utils/base64.go

@@ -0,0 +1,31 @@
+package utils
+
+import (
+	"encoding/base64"
+	"strings"
+)
+
+func DecodeBase64(s string, urlSafe bool) (string, error) {
+	s = strings.TrimSpace(s)
+	if len(s)%4 != 0 {
+		s += strings.Repeat("=", 4-len(s)%4)
+	}
+	var decodeStr []byte
+	var err error
+	if urlSafe {
+		decodeStr, err = base64.URLEncoding.DecodeString(s)
+	} else {
+		decodeStr, err = base64.StdEncoding.DecodeString(s)
+	}
+	if err != nil {
+		return "", err
+	}
+	return string(decodeStr), nil
+}
+
+func EncodeBase64(s string, urlSafe bool) string {
+	if urlSafe {
+		return base64.URLEncoding.EncodeToString([]byte(s))
+	}
+	return base64.StdEncoding.EncodeToString([]byte(s))
+}