style: 水印设置样式优化

frontend/src/lang/en.js

@@ -2840,9 +2840,9 @@ export default {
   },
   watermark: {
     support_params: 'Currently supported parameters:',
-    enable: 'Enable',
+    enable: 'Watermark Enable',
     enable_panel_custom: 'Allow the dashboard to open or close the watermark independently',
-    content: 'content',
+    content: 'Watermark Content',
     custom_content: 'Custom Content',
     account: 'Account',
     nick_name: 'Nick Name',

frontend/src/lang/tw.js

@@ -2833,9 +2833,9 @@ export default {
   },
   watermark: {
     support_params: '當前支持的參數：',
-    enable: '啟用',
+    enable: '啟用水印',
     enable_panel_custom: '允許儀表板單獨打開或者關閉水印',
-    content: '內容',
+    content: '水印內容',
     custom_content: '自定義公式',
     account: '賬號',
     nick_name: '昵稱',

frontend/src/lang/zh.js

@@ -2833,9 +2833,9 @@ export default {
   },
   watermark: {
     support_params: '当前支持的参数：',
-    enable: '启用',
+    enable: '启用水印',
     enable_panel_custom: '允许仪表板单独打开或者关闭水印',
-    content: '内容',
+    content: '水印内容',
     custom_content: '自定义公式',
     account: '账号',
     nick_name: '昵称',