style(theme): 统一应用主题样式并更新组件样式变量

- 在多个页面组件中添加动态主题样式绑定
- 将硬编码的颜色值替换为CSS变量和主题配置
- 引入主题样式计算逻辑到各个页面
- 更新优惠券、地址、订单等页面的主题适配
- 替换线性渐变背景为动态主题颜色
- 移除uni_modules组件中的$set方法调用以优化性能
- 更新README中主题色管理状态为已完成

pages/navigation/search/search.scss

@@ -98,7 +98,7 @@ page {
   }
   > .sort-btn-confim {
     color: #fff;
-    background-image: linear-gradient(90deg, #ff6b35, #ff9f28, #ffcc03);
+    background-image: linear-gradient(90deg, $main-color, $light-color, $aider-light-color);
   }
 }
 .uinput {
@@ -328,7 +328,7 @@ page {
   flex-shrink: 0;
   font-size: 28rpx;
   color: #fff;
-  background: linear-gradient(to right, #ff9801, #ff570a);
+  background: linear-gradient(to right, $main-color, $aider-light-color);
   border-radius: 60rpx;
 }
 

pages/navigation/search/searchPage.vue

@@ -1,5 +1,5 @@
 <template>
-	<view class="content" :class="{ 'content--goods': isShowSeachGoods }">
+	<view class="content" :class="{ 'content--goods': isShowSeachGoods }" :style="themeStyle">
 		<u-navbar
 			:bg-color="navObj.background"
 			:auto-back="false"
@@ -260,9 +260,13 @@ import goodsList from '@/components/m-goods-list/list.vue'
 import { getHotKeywords } from '@/api/home.js'
 import mSearch from '@/components/m-search-revision/m-search-revision.vue'
 import storage from '@/utils/storage'
+import { getThemeStyle } from '@/utils/theme'
 
 const store = useStore()
 
+// 注入主题色 CSS 变量，商品价格、排序选中态、标签等随之联动
+const themeStyle = computed(() => getThemeStyle(store.state.theme))
+
 const mSearchRef = ref<any>(null)
 
 const empty = ref(false)