fix(home): replace h-screen with h-[100dvh] for mobile viewport height

use 100dvh instead of h-screen to properly calculate full viewport height on mobile browsers, avoiding layout issues caused by dynamic browser UI elements

src/pages/home/components/ChatMainList/index.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="flex flex-col h-screen relative overflow-hidden">
+  <div class="flex h-[100dvh] flex-col relative overflow-hidden">
     <!-- 顶部自定义导航栏 -->
     <div class="absolute top-0 left-0 w-full z-10">
       <ChatTopNavBar ref="topNavBarRef" :mainPageDataModel="mainPageDataModel" @showDrawer="handleShowDrawer" />

src/pages/home/index.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="index-page w-full h-screen overflow-hidden bg-liner">
+  <div class="index-page w-full h-[100dvh] overflow-hidden bg-liner">
     <ChatMainList @showDrawer="showDrawer" />
 
     <!-- 日历组件 -->