refactor: 删除多余的uview-plus SCSS导入,简化vite配置

vite.config.js

@@ -4,5 +4,13 @@ import uni from '@dcloudio/vite-plugin-uni'
 export default defineConfig({
   plugins: [uni()],
   // 指定项目根目录为输入目录
-  root: process.cwd()
+  root: process.cwd(),
+  css: {
+    preprocessorOptions: {
+      scss: {
+        // 静默 sass 废弃警告
+        silenceDeprecations: ['legacy-js-api', 'import']
+      }
+    }
+  }
 })