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/passport/wechatH5Login.vue

@@ -1,5 +1,5 @@
 <template>
-  <view class="container">
+  <view :style="themeStyle" class="container">
     <u-navbar :auto-back="false" @leftClick="back" title="公众网页登录"></u-navbar>
     <view class="wx-auth-container">
       <div class="box">
@@ -20,10 +20,14 @@
 </template>
 
 <script setup lang="ts">
-import { ref, onMounted } from 'vue'
+import { ref, onMounted, computed } from 'vue'
 import { whetherNavigate } from '@/utils/Foundation'
 import config from '@/config/config'
 import api from '@/config/api.js'
+import { useStore } from '@/store'
+import { getThemeStyle } from '@/utils/theme'
+const store = useStore()
+const themeStyle = computed(() => getThemeStyle(store.state.theme))
 
 const projectName = ref(config.name)