feat: 新增抱团组件和申请助手弹窗组件

新增huddle-box和helper-pop组件，包含相关图片资源和样式调整
修复item-mj组件中itemBottom导入错误
优化移动端样式适配
更新sectionV2页面引入新组件
补充公共样式和动画效果

component/helper-pop/helper-pop.js

@@ -0,0 +1,30 @@
+// my-component.js
+// 引入全局 Vue 对象（因在 HTML 中通过 script 引入，Vue 已挂载到 window）
+const { defineComponent, ref, inject, defineAsyncComponent, onMounted } = Vue;
+
+// 定义组件（直接使用模板）
+export const helperPop = defineComponent({
+    name: "item-bottom",
+    props: {},
+
+    setup(props) {
+        let isMobile = ref(false);
+
+        let state = ref(false);
+
+        onMounted(() => {
+            isMobile.value = window.isMobile;
+        });
+
+        const open = () => (state.value = true);
+        const closeGroup = () => (state.value = false);
+
+        const holdback = () => {};
+
+        return { state, isMobile, holdback, closeGroup, open };
+    },
+
+    components: {},
+
+    template: `<div class="helper-pop flexflex" v-if="state" @click="closeGroup" @touchmove.prevent>    <div class="helper-box flexacenter" @click.stop="holdback">        <img class="cross-grey" @click.stop="closeGroup" src="../../img/cross-grey.png" alt="">        <img class="helper-text helper-text1" src="../../img/apply-for-name.png" alt="">        <div class="helper-box-box flexflex">            <div class="helper-QRcode-box flexcenter">                <img class="left-top helper-QRcode-box-icon" src="../../img/yellow-border.svg" alt="">                <img class="left-bottom helper-QRcode-box-icon" src="../../img/yellow-border.svg" alt="">                <img class="right-top helper-QRcode-box-icon" src="../../img/yellow-border.svg" alt="">                <img class="right-bottom helper-QRcode-box-icon" src="../../img/yellow-border.svg" alt="">                <img class="helper-QRcode-img" src="https://u.gter.net/assistantwxqrcode.png" alt="">            </div>            <span class="helper-box-text">长按识别二维码</span>        </div>        <img class="helper-bottom" src="../../img/helper-bottom-yellow.svg" alt="">        <img class="helper-bottom" src="../../img/helper-bottom-blue.svg" alt="">    </div></div>`,
+});