feat(recall): 添加生成海报页面跳转功能并调整底部按钮样式

在ActivityHistoryPage.vue中添加跳转到海报页面的路由功能
调整PosterPage.vue中底部按钮的样式和间距

@@ -153,6 +153,8 @@ const missingInfo = ref('')
 
 // Actions
 const handleGeneratePoster = (item) => {
+  // 跳转到/recall/poster?id=item.id
+  router.push({ path: '/recall/poster', query: { id: item.id } })
   showToast('生成海报: ' + item.title)
 }
 

 <!--
  * @Date: 2025-12-23 15:50:59
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-12-23 16:40:19
+ * @LastEditTime: 2025-12-23 17:02:26
  * @FilePath: /mlaj/src/views/recall/PosterPage.vue
  * @Description: 分享海报页面
 -->
@@ -19,7 +19,7 @@
     </div>
 
     <!-- Buttons (Fixed at Bottom) -->
-    <div class="fixed bottom-0 left-0 right-0 bg-[#1E40C8] px-8 py-6 pb-10 flex gap-4 z-50 max-w-md mx-auto w-full">
+    <div class="fixed bottom-0 left-0 right-0 px-8 py-3 flex gap-4 z-50 max-w-md mx-auto w-full">
       <van-uploader :after-read="afterRead" accept="image/*" class="flex-1 w-full" :show-upload="false">
         <template #default>
           <van-button block color="#0052D9" plain