feat(index): 添加招聘会服务权限控制

- 在招聘会服务项上添加 isFourLevelLinkagePurview 权限判断
- 确保只有具备四级联动权限的用户才能看到招聘会功能入口
- 保持原有的点击事件处理逻辑不变

pages/index/components/index-one.vue

@@ -155,7 +155,7 @@
                     </view>
                     <view class="service-title">招聘会</view>
                 </view>
-				<view class="service-item press-button" @click="helpClick">
+				<view class="service-item press-button" v-if="isFourLevelLinkagePurview" @click="helpClick">
 				    <view class="service-icon service-icon-1">
 				        <uni-icons type="shop" size="32" color="#FFFFFF"></uni-icons>
 				    </view>