Fix: Modify the personal center style #10703 (#11347)

### What problem does this PR solve?

Fix: Modify the personal center style

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/pages/user-setting/mcp/index.tsx

@@ -71,6 +71,7 @@ export default function McpServer() {
                 className="w-40"
                 value={searchString}
                 onChange={handleInputChange}
+                placeholder={t('common.search')}
               ></SearchInput>
               <Button variant={'secondary'} onClick={switchSelectionMode}>
                 {isSelectionMode ? (