css的增加devSourcemap，方便调试

vite.config.ts

@@ -55,6 +55,7 @@ export default ({ command, mode }: ConfigEnv): UserConfig => {
       __APP_INFO__: JSON.stringify(__APP_INFO__),
     },
     css: {
+      devSourcemap: true,
       preprocessorOptions: {
         scss: {
           modifyVars: {},