【IM 优化】通讯录顶部搜索栏改为 h-14，与消息 Tab 顶部对齐，避免切换抖动

src/views/im/home/pages/contact/index.vue

@@ -7,9 +7,9 @@
   -->
   <div class="flex flex-1 h-full min-w-0 bg-[var(--el-bg-color)]">
     <ResizableAside :default-width="260" :storage-key="StorageKeys.asideWidth">
-      <!-- 顶部：仅搜索框 -->
+      <!-- 顶部：仅搜索框；h-14 与消息 Tab 顶部对齐，避免切换时搜索框上下抖动 -->
       <div
-        class="flex flex-shrink-0 items-center px-4 py-2 border-b border-[var(--el-border-color-lighter)]"
+        class="flex flex-shrink-0 items-center h-14 px-4 border-b border-[var(--el-border-color-lighter)]"
       >
         <el-input v-model="keyword" placeholder="搜索" clearable class="flex-1">
           <template #prefix>