refactor(components&cart): 调整语言包引用路径

统一修正空状态组件和购物车页面的语言包调用路径，将零散的语言项归类到goods.cart命名空间下，移除默认兜底文案

components/ns-empty/ns-empty.vue

@@ -43,13 +43,13 @@ export default {
 	computed: {
 		// 显示文案:优先用 prop 传入的,没有则用语言包默认值
 		displayText() {
-			return this.text || this.$lang('common.mescrollEmpty') || '暂无相关数据';
+			return this.text || this.$lang('common.mescrollEmpty');
 		},
 		displaySubText() {
 			return this.subText || '';
 		},
 		displayBtnText() {
-			return (this.emptyBtn && this.emptyBtn.text) || this.$lang('toGoodsCategoryPage') || '去逛逛';
+			return (this.emptyBtn && this.emptyBtn.text) || this.$lang('toGoodsCategoryPage');
 		},
 		// 建立 componentRefresh 依赖,切语言时自动更新
 		_i18nRefresh() {

pages_goods/public/js/cart.js

@@ -233,14 +233,14 @@ export default {
 			}
 			if (cart_id.length == 0) {
 				this.$util.showToast({
-					title: this.$lang('selectDeleteGoods')
+					title: this.$lang('goods.cart.selectDeleteGoods')
 				});
 				return;
 			}
 
 			uni.showModal({
-				title: this.$lang('tip'),
-				content: cart_id.length > 1 ? this.$lang('confirmDeleteGoods') : this.$lang('confirmDeleteGood'),
+				title: this.$lang('goods.cart.tip'),
+				content: cart_id.length > 1 ? this.$lang('goods.cart.confirmDeleteGoods') : this.$lang('goods.cart.confirmDeleteGood'),
 				success: res => {
 					if (res.confirm) {
 						cart_id = cart_id.toString();
@@ -381,8 +381,8 @@ export default {
 		 */
 		clearInvalidGoods() {
 			uni.showModal({
-				title: this.$lang('tip'),
-				content: this.$lang('confirmClearInvalid'),
+				title: this.$lang('goods.cart.tip'),
+				content: this.$lang('goods.cart.confirmClearInvalid'),
 				success: res => {
 					if (res.confirm) {
 						var cart_ids = [];
@@ -432,11 +432,11 @@ export default {
 			if (event.type == 'plus') {
 				if (data.max_buy > 0 && data.max_buy < data.stock) {
 					this.$util.showToast({
-						title: this.$lang('purchaseLimit', { maxBuy: data.max_buy })
+						title: this.$lang('goods.cart.purchaseLimit', { maxBuy: data.max_buy })
 					});
 				} else {
 					this.$util.showToast({
-						title: this.$lang('outOfStock')
+						title: this.$lang('goods.cart.outOfStock')
 					});
 				}
 			} else {