feat(webui): refresh brand theme and add day-night mode

webui/src/i18n/index.ts

@@ -330,6 +330,8 @@ const resources = {
       recipientId: 'recipient id',
       languageZh: '中文',
       languageEn: 'English',
+      themeLight: 'Day',
+      themeDark: 'Night',
       expand: 'Expand',
       collapse: 'Collapse',
       configRoot: '(root)',
@@ -822,6 +824,8 @@ const resources = {
       recipientId: '接收者 ID',
       languageZh: '中文',
       languageEn: 'English',
+      themeLight: '白天',
+      themeDark: '黑夜',
       expand: '展开',
       collapse: '收起',
       configRoot: '（根）',