style: 支持深色主题

Yi.Ai.Vue3/src/components/WelecomeText/index.vue

@@ -1,13 +1,18 @@
 <!-- 欢迎提示词 -->
 <script setup lang="ts">
 import { Typewriter } from 'vue-element-plus-x';
+import { useColorMode } from '@vueuse/core';
 import { useTimeGreeting } from '@/hooks/useTimeGreeting';
 import { useUserStore } from '@/stores';
 
 const greeting = useTimeGreeting();
 const userStore = useUserStore();
+const mode = useColorMode();
 
 const username = computed(() => userStore.userInfo?.username ?? '意心Ai，一心只为打造更良心的Ai平台');
+
+// 根据主题动态设置雾化背景色
+const fogBgColor = computed(() => mode.value === 'dark' ? '#111827' : '#fff');
 </script>
 
 <template>
@@ -22,7 +27,7 @@ const username = computed(() => userStore.userInfo?.username ?? '意心Ai，一
         interval: 45,
       }"
       :is-fog="{
-        bgColor: '#fff',
+        bgColor: fogBgColor,
       }"
     />
   </div>