chore(chat-ui): 提交消息列表与欢迎页剩余改动

src/components/chat/MessageList.vue

@@ -278,7 +278,6 @@ onMounted(() => {
 .message-list-container {
   flex: 1;
   position: relative;
-    min-width: 900px;
   min-height: 0;
 }
 

src/components/chat/WelcomeScreen.vue

@@ -317,7 +317,7 @@ const suggestions = computed(() => {
   padding: 12px 20px;
   background: #F8F9FA;
   border: 1px solid transparent;
-  border-radius: 10px;
+  border-radius: 15px;
   font-size: 12px;
   text-align: left;
   cursor: pointer;
@@ -330,7 +330,7 @@ const suggestions = computed(() => {
   }
 // TODO: 悬浮边框和背景颜色
   &:hover {
-    background: rgba(59, 130, 246, 0.05);
+    background: #E9EAEB;
 
     .arrow-icon {
       transform: translateX(4px);