refactor(member): 优化多语言调用和可选链使用

1.  移除语言包默认参数，统一使用翻译文本作为默认值
2.  为嵌套属性访问添加可选链操作符，避免空指针报错
3.  新增会员相关的多语言词条

pages_tool/member/index.vue

@@ -21,17 +21,17 @@
 
 				<view class="foot">
 					<view class="item" @click="tourl('/pages_tool/agreement/contenr?type=0')">{{
-						$lang('privacyPolicy', '隐私协议') }}</view>
+						$lang('privacyPolicy') }}</view>
 					<view class="item" @click="tourl('/pages_tool/agreement/contenr?type=1')">{{
-						$lang('registrationAgreement', '注册协议') }}</view>
+						$lang('registrationAgreement') }}</view>
 				</view>
 
 				<!-- 退出登录和账号注销按钮 -->
 				<view class="action-buttons" v-if="storeToken">
 					<view class="action-btn cancel-btn" v-if="isShowCancelButton"
-						@click="cancellation">{{ $lang('cancellation', '账号注销') }}</view>
+						@click="cancellation">{{ $lang('cancellation') }}</view>
 					<view class="action-btn logout-btn" v-if="isShowLogoutButton"
-						@click="logout">{{ $lang('logout', '退出登录') }}</view>					
+						@click="logout">{{ $lang('logout') }}</view>					
 				</view>
 			</view>
 
@@ -97,10 +97,10 @@ export default {
 			};
 		},
 		isShowCancelButton() {
-			return this.diyData?.global?.isShowCancelButton[`${this.getAppType()}`] !== 0
+			return this.diyData?.global?.isShowCancelButton?.[`${this.getAppType()}`] !== 0
 		},
 		isShowLogoutButton() {
-			return this.diyData?.global?.isShowLogoutButton[`${this.getAppType()}`] !== 0
+			return this.diyData?.global?.isShowLogoutButton?.[`${this.getAppType()}`] !== 0
 		}
 	},
 	onLoad() {

pages_tool/member/public/js/member-public.js

@@ -12,8 +12,8 @@ export default {
 		// 退出登录
 		logout() {
 			uni.showModal({
-				title: this.$lang('logoutTitle', '提示'),
-				content: this.$lang('logoutContent',  '确定要退出登录吗'),
+				title: this.$lang('logoutTitle'),
+				content: this.$lang('logoutContent'),
 				success: (res) => {
 					if (res.confirm) {
 						this.clearLoginState();