ui: Update clipboard copy message text

Simplify the copy success message from "Already copied to clipboard"

Signed-off-by: Jianhui Zhao <zhaojh329@gmail.com>

ui/src/i18n/en.json

@@ -66,7 +66,7 @@
   "Invalid IP address": "Invalid IP address",
   "Invalid port": "Invalid port",
   "Must start with /": "Must start with /",
-  "Already copied to clipboard": "Already copied to clipboard",
+  "Copied to clipboard": "Copied to clipboard",
   "Please use shortcut \"Shift+Insert\"": "Please use shortcut \"Shift+Insert\"",
   "Your device's rtty does not support https proxy, please upgrade it.": "Your device's rtty does not support https proxy, please upgrade it."
-}
+}

ui/src/i18n/zh-CN.json

@@ -67,7 +67,7 @@
   "Invalid IP address": "无效的 IP 地址",
   "Invalid port": "无效的端口",
   "Must start with /": "必须以 / 开头",
-  "Already copied to clipboard": "已复制到剪切板",
+  "Copied to clipboard": "已复制到剪切板",
   "Please use shortcut \"Shift+Insert\"": "请使用快捷键 \"Shift+Insert\"",
   "Your device's rtty does not support https proxy, please upgrade it.": "你的设备的 rtty 不支持 https 代理，请升级"
-}
+}

ui/src/views/Rtty.vue

@@ -84,7 +84,7 @@ export default {
         const text = this.term.getSelection()
         if (text) {
           this.$copyText(text).then(() => {
-            this.$message.success(this.$t('Already copied to clipboard'))
+            this.$message.success(this.$t('Copied to clipboard'))
           })
         }
       } else if (name === 'paste') {