fix(settings): Radio.Group 添加 optionType="button" 启用按钮渲染

src/web/features/settings/index.tsx

@@ -56,6 +56,7 @@ export function SettingsPage() {
           <Radio.Group
             buttonStyle="solid"
             onChange={(e) => handleThemeChange(parseThemePreference(e.target.value))}
+            optionType="button"
             options={THEME_OPTIONS.map((o) => ({ label: o.label, value: o.value }))}
             value={preference}
           />