fix(summer-camp): 核心体验卡片兼容对象格式({name,desc,icon})

pages/summer-camp.vue

@@ -152,7 +152,11 @@
         <div class="activities-grid">
           <div v-for="(activity, i) in camp.coreActivities" :key="i" class="activity-card">
             <div class="activity-index">{{ String(i + 1).padStart(2, '0') }}</div>
-            <p class="activity-text">{{ activity }}</p>
+            <template v-if="activity && typeof activity === 'object'">
+              <h3 class="activity-name">{{ activity.name || activity.title }}</h3>
+              <p v-if="activity.desc" class="activity-text">{{ activity.desc }}</p>
+            </template>
+            <p v-else class="activity-text">{{ activity }}</p>
           </div>
         </div>
       </div>
@@ -492,6 +496,13 @@ const campFAQ = computed(() => camp.value?.faq || [])
   color: @color-primary-lighter;
 }
 
+.activity-name {
+  font-size: @font-size-lg;
+  font-weight: @font-weight-medium;
+  color: @color-text-primary;
+  margin: 0 0 @space-xs 0;
+}
+
 .activity-text {
   font-size: @font-size-base;
   color: @color-text-secondary;