refactor(HomePage): 将ActivityCard包裹在div中以提高可维护性

@@ -311,11 +311,9 @@
               </router-link>
             </div>
             <div class="space-y-4">
-              <ActivityCard
-                v-for="activity in activities.slice(0, 3)"
-                :key="activity.id"
-                :activity="activity"
-              />
+              <div v-for="activity in activities.slice(0, 3)" :key="activity.id">
+                <ActivityCard :activity="activity" />
+              </div>
             </div>
           </section>