style(chat-main-list): remove redundant flex classes from scroll container

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

@@ -6,7 +6,7 @@
     </div>
 
     <div ref="mainScrollRef"
-      class="flex flex-col min-h-0 flex-1 overflow-y-auto overscroll-contain scrollbar-none [-ms-overflow-style:none] [&::-webkit-scrollbar]:hidden"
+      class="min-h-0 flex-1 overflow-y-auto overscroll-contain scrollbar-none [-ms-overflow-style:none] [&::-webkit-scrollbar]:hidden"
       @scroll="handleScroll" @touchstart.capture="handleScrollAreaTouchStart" @touchstart="handleScrollAreaTouchStart"
       @touchmove="handleScrollAreaTouchMove">
       <div class="relative">