refactor: 统一项目内国际化key的命名空间格式

本次提交对全项目的国际化调用进行了规范化重构：
1. 为中文/英文语言包新增了avatar和gender的别名映射，兼容旧有headImg/sex写法
2. 修正了lang.js中的注释路径错误
3. 将所有页面和组件内的$lang调用从短路径改为带业务模块前缀的完整命名空间路径，例如将$lang('title')改为$lang('article.list.title')
4. 优化了i18n-lazy.js的注释说明，补充了正确的key命名格式示例
5. 统一了分销、订单、会员等模块的国际化key层级，确保所有语言调用路径一致

pages_tool/member/cancellation.vue

@@ -10,9 +10,9 @@
 				<view class="align-center agreement-btn-select">
 					<text v-if="isSelect" class="iconfont icon-dui color-base-text" @click="changeSelect"></text>
 					<text v-else class="iconfont icon-yuan_checkbox" @click="changeSelect"></text>
-					<text class="agreement-text" @click="changeSelect">{{ $lang('agreeTermsText') }}</text>
+					<text class="agreement-text" @click="changeSelect">{{ $lang('member.cancellation.agreeTermsText') }}</text>
 				</view>
-				<button class="btn color-base-bg" @click="next">{{ $lang('nextStep') }}</button>
+				<button class="btn color-base-bg" @click="next">{{ $lang('member.cancellation.nextStep') }}</button>
 			</view>
 		</view>
 	</view>
@@ -60,7 +60,7 @@ export default {
 				this.$util.redirectTo('/pages_tool/member/assets');
 			} else {
 				this.$util.showToast({
-					title: this.$lang('pleaseAgreeFirst')
+					title: this.$lang('member.cancellation.pleaseAgreeFirst')
 				});
 			}
 		}