feat: add clear button for group background image

client/shared/i18n/langs/en-US/translation.json

@@ -120,6 +120,7 @@
   "k5bb71ad7": "Installed",
   "k5be1a5b0": "Delete role group",
   "k5bec387": "Unable to get group information",
+  "k5ce4e16d": "Clear",
   "k5d2a6631": "Allow to manage channels",
   "k5f91e72c": "Built Plugins",
   "k5fc9ccb6": "Operation too frequently",

client/shared/i18n/langs/zh-CN/translation.json

@@ -120,6 +120,7 @@
   "k5bb71ad7": "已安装",
   "k5be1a5b0": "删除身份组",
   "k5bec387": "无法获取到群组信息",
+  "k5ce4e16d": "清除",
   "k5d2a6631": "允许管理频道",
   "k5f91e72c": "内置插件",
   "k5fc9ccb6": "操作过于频繁",

client/web/src/components/modals/GroupDetail/Config.tsx

@@ -11,7 +11,7 @@ import { Image } from 'tailchat-design';
 import { Loading } from '@/components/Loading';
 import { FullModalField } from '@/components/FullModal/Field';
 import { FullModalCommonTitle } from '@/components/FullModal/CommonTitle';
-import { Switch } from 'antd';
+import { Button, Switch } from 'antd';
 import { pluginGroupConfigItems } from '@/plugin/common';
 import { ensurePluginNamePrefix } from '@/utils/plugin-helper';
 import { ImageUploader } from '@/components/ImageUploader';
@@ -74,6 +74,18 @@ export const GroupConfig: React.FC<{
             <div className="text-xs opacity-80">
               {t('建议比例: 16:9 | 建议大小: 1280x720')}
             </div>
+
+            {config['groupBackgroundImage'] && (
+              <Button
+                className="mt-1"
+                type="primary"
+                onClick={() => {
+                  handleModifyConfig('groupBackgroundImage', '');
+                }}
+              >
+                {t('清除')}
+              </Button>
+            )}
           </>
         }
       />