style(chat): fix invalid flex-justify-end classes

replace invalid flex-justify-end class with correct justify-end utility, and update the matching comment

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

@@ -1,5 +1,5 @@
 <template>
-  <!-- 外层行容器：接收来自父组件的对齐类（如 flex flex-justify-end） -->
+  <!-- 外层行容器：接收来自父组件的对齐类（如 flex justify-end） -->
   <div class="chat-mine-row">
     <div class="chat-mine bg-17294E">
       <span class="text-[15px] text-white">{{ text }}</span>

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

@@ -96,7 +96,7 @@
         </template>
 
         <template v-else-if="item.msgType === MessageRole.ME">
-          <ChatCardMine class="flex flex-justify-end" :text="item.msg" />
+          <ChatCardMine class="flex justify-end" :text="item.msg" />
         </template>
 
         <template v-else>