fix: 修复打包后头像图片引用路径出错的问题

src/layouts/default/header/components/user-dropdown/DropDown.vue

@@ -3,7 +3,7 @@
         <span :class="[prefixCls, `${prefixCls}--${theme}`]" class="flex">
             <span style="border-left: 1px solid rgb(255 255 255 / 30%); height: 30px; padding-right: 15px"></span>
             <div style="margin-right: 12px; height: 30px; margin-top: -10px">
-                <a-image :height="24" :src="getUserInfo.avatar" :width="24" fallback="src/assets/images/header.jpg" />
+                <a-image :height="24" :src="getUserInfo.avatar" :width="24" :fallback="headerImg" />
             </div>
             <span :class="`${prefixCls}__info hidden md:block`">
                 <span :class="`${prefixCls}__name  `" class="truncate">
@@ -117,7 +117,8 @@
                 getUserInfo,
                 handleMenuClick,
                 register,
-                getUseLockPage
+                getUseLockPage,
+                headerImg
             };
         },
         methods: {