fix: #100 #142 #115 unicode characters show problem

code/handlers/common.go

@@ -60,7 +60,7 @@ func processUnicode(msg string) string {
 		r, _ := regexp.Compile(`\\u`)
 		s = r.ReplaceAllString(s, "")
 		i, _ := strconv.ParseInt(s, 16, 32)
-		return strconv.Itoa(int(i))
+		return string(rune(i))
 	})
 }