feat(navigation): 即将上线的导航也在小程序显示，点击弹提示

- 后端API改为返回status!=0的导航（上线+即将上线）
- 前端即将上线状态判断改为status===2
- 点击即将上线导航弹出'该功能暂未开放'提示

server/MiAssessment/src/MiAssessment.Core/Services/HomeService.cs

@@ -82,7 +82,7 @@ public class HomeService : IHomeService
 
         var navigations = await _dbContext.HomeNavigations
             .AsNoTracking()
-            .Where(n => n.Status == 1 && !n.IsDeleted)
+            .Where(n => n.Status != 0 && !n.IsDeleted)
             .OrderByDescending(n => n.Sort)
             .Select(n => new HomeNavigationDto
             {

uniapp/pages/index/index.vue

@@ -57,7 +57,7 @@
             @click="handleNavigationClick(item)"
           >
             <!-- 即将上线标签 -->
-            <view v-if="item.status === 0" class="coming-soon-tag">
+            <view v-if="item.status === 2" class="coming-soon-tag">
               <text>即将上线</text>
             </view>
             <image 
@@ -223,7 +223,7 @@ function handleBannerClick(item) {
  */
 function handleNavigationClick(item) {
   // 即将上线的导航，弹出提示
-  if (item.status === 0) {
+  if (item.status === 2) {
     uni.showToast({
       title: '该功能暂未开放',
       icon: 'none',