fix: 统一移除RecommendedSection的v-if条件

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

cfc-frontend/pages/body/index.vue

@@ -121,7 +121,6 @@
 
     <!-- 个性化推荐 -->
     <RecommendedSection
-      v-if="recommendItems.length > 0"
       :items="recommendItems"
       :hasMore="recommendHasMore"
       @itemClick="onRecommendItemClick"

cfc-frontend/pages/index-home/index.vue

@@ -148,7 +148,6 @@
 
     <!-- 个性化推荐 -->
     <RecommendedSection
-      v-if="recommendItems.length > 0"
       :items="recommendItems"
       :hasMore="recommendHasMore"
       @itemClick="onRecommendItemClick"

cfc-frontend/pages/wisdom/index.vue

@@ -134,7 +134,6 @@
 
     <!-- 个性化推荐 -->
     <RecommendedSection
-      v-if="recommendItems.length > 0"
       :items="recommendItems"
       :hasMore="recommendHasMore"
       @itemClick="onRecommendItemClick"