feat(welcome): 添加标题图片并优化布局

- 新增美乐爱觉标题图片，参考 ChoosePage.vue 的设计
- 调整布局为水平排列，3个功能入口在一行显示
- 优化图标尺寸为 5rem，文字为 0.95rem
- 调整左右边距保持一致，使用 space-between 均匀分布
- 布局更靠底部，padding-bottom 设置为 3rem
- 修复标题显示位置，标题在顶部，功能入口在底部

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

@@ -7,8 +7,13 @@
 -->
 -->
 <template>
 <template>
   <div class="welcome-content">
   <div class="welcome-content">
-    <!-- 功能入口区域 - 水平布局 -->
-    <div class="entry-orbit">
+    <!-- 标题区域 -->
+    <div class="mt-20 flex flex-col items-center z-10 w-full px-8">
+      <img :src="titleImg" class="w-full max-w-[300px] mb-4 object-contain" alt="美乐爱觉" />
+    </div>
+
+    <!-- 功能入口区域 - 水平布局，自动推到底部 -->
+    <div class="mt-auto entry-orbit">
       <div class="orbit-entries">
       <div class="orbit-entries">
         <WelcomeEntryItem
         <WelcomeEntryItem
           v-for="entry in entries"
           v-for="entry in entries"
@@ -31,6 +36,9 @@ import WelcomeEntryItem from './WelcomeEntryItem.vue'
 const router = useRouter()
 const router = useRouter()
 const entries = ref(welcomeEntries)
 const entries = ref(welcomeEntries)
 
 
+// 导入标题图片
+const titleImg = 'https://cdn.ipadbiz.cn/mlaj/recall/img/title007@2x.png'
+
 const handleEntryClick = (entry) => {
 const handleEntryClick = (entry) => {
   if (entry.isExternal) {
   if (entry.isExternal) {
     // 外部链接：获取用户ID并拼接
     // 外部链接：获取用户ID并拼接
@@ -53,7 +61,6 @@ const handleEntryClick = (entry) => {
   display: flex;
   display: flex;
   flex-direction: column;
   flex-direction: column;
   align-items: center;
   align-items: center;
-  justify-content: flex-end;
   padding-left: 2rem;
   padding-left: 2rem;
   padding-right: 2rem;
   padding-right: 2rem;
   padding-bottom: 3rem;
   padding-bottom: 3rem;
@@ -64,6 +71,7 @@ const handleEntryClick = (entry) => {
   position: relative;
   position: relative;
   width: 100%;
   width: 100%;
   max-width: 36rem;
   max-width: 36rem;
+  margin-top: auto;
 
 
   .orbit-entries {
   .orbit-entries {
     display: flex;
     display: flex;