refactor(promotion pages): 统一分销和商品分类页的底部适配逻辑

重构了全局配置里的底部边距计算方式，替换原有tabBarPaddingStyleValue为tabBarPagePaddingStyle，同时调整了tabBarHeight的取值逻辑，适配是否显示tabBar的场景，移除冗余的计算属性

common/js/golbalConfig.js

@@ -65,14 +65,10 @@ export default {
 		},
 		tabBarPagePaddingStyle() {
 			return this.$util.objToStyle({
-				paddingBottom: this.shouldShowTabBar ? '112rpx' : '0'
+				height: `calc(100vh - ${this.tabBarHeight})`,
+				paddingBottom: this.tabBarHeight
 			});
 		},
-		tabBarPaddingStyleValue() {
-			return {
-				paddingBottom: this.shouldShowTabBar ? '112rpx' : '0'
-			};
-		},
 		siteInfo() {
 			return this.$store.state.siteInfo;
 		},
@@ -132,7 +128,7 @@ export default {
 			return this.$store.state.diySeckillInterval;
 		},
 		tabBarHeight() {
-			return this.$store.state.tabBarHeight;
+			return this.shouldShowTabBar ? this.$store.state.tabBarHeight : '0rpx';
 		},
 		mapConfig() {
 			return this.$store.state.mapConfig;

pages_promotion/fenxiao/index.vue

@@ -581,7 +581,7 @@ export default {
 		},
 		fenxiaoIndexPageStyle() {
 			const style = {
-				...this.tabBarPaddingStyleValue
+				...this.tabBarPagePaddingStyle
 			};
 			if (this.$util && this.$util.img) {
 				style.background = 'url(' + this.$util.img('public/uniapp/fenxiao/index/commissionFission-background.png') + ')';

pages_promotion/merch/merchcategory.vue

@@ -1,6 +1,6 @@
 <template>
 	<view :style="themeColor">
-		<view class="category-page-wrap category-template-1" :style="categoryPageStyle">
+		<view class="category-page-wrap category-template-1" :style="tabBarPagePaddingStyle">
 
 		<!-- 	<view class="search-box" @click="$util.redirectTo('/pages_tool/goods/search')">
 				<view class="search-content">
@@ -94,14 +94,6 @@
 				user_type:uni.getStorageSync('user_type')
 			};
 		},
-		computed: {
-			categoryPageStyle() {
-				return this.$util.objToStyle({
-					height: 'calc(100vh - 56px)',
-					...this.tabBarPaddingStyleValue
-				});
-			}
-		},
 		onLoad() {
 			uni.hideTabBar()
 			this.getCategory()