fix(theme): 修复跟随系统主题解析

src/components/Hamburger/index.vue

@@ -19,7 +19,7 @@ const layout = computed(() => settingsStore.layout);
 
 const hamburgerClass = computed(() => {
   // 如果暗黑主题
-  if (settingsStore.theme === ThemeMode.DARK) {
+  if (settingsStore.resolvedTheme === ThemeMode.DARK) {
     return "hamburger--white";
   }
 

src/components/ThemeSwitch/index.vue

@@ -1,7 +1,7 @@
 <template>
   <el-dropdown trigger="click" @command="handleDarkChange">
     <el-icon :size="20">
-      <component :is="settingsStore.theme === ThemeMode.DARK ? Moon : Sunny" />
+      <component :is="currentThemeIcon" />
     </el-icon>
     <template #dropdown>
       <el-dropdown-menu>
@@ -34,6 +34,14 @@ const theneList = [
   { label: t("login.auto"), value: ThemeMode.AUTO, component: Monitor },
 ];
 
+const currentThemeIcon = computed(() => {
+  if (settingsStore.theme === ThemeMode.AUTO) {
+    return Monitor;
+  }
+
+  return settingsStore.resolvedTheme === ThemeMode.DARK ? Moon : Sunny;
+});
+
 const handleDarkChange = (theme: ThemeMode) => {
   settingsStore.theme = theme;
 };