Revert "Restyle the web UI as a dark trading terminal"

This reverts commit d5fa78f1ad.

web/src/main.ts

@@ -1,8 +1,6 @@
 import { createPinia } from "pinia"
 import App from "@/App.vue"
 import { router } from "@/router"
-import "@fontsource-variable/jetbrains-mono"
-import "@fontsource-variable/space-grotesk"
 import "element-plus/dist/index.css"
 import "element-plus/theme-chalk/dark/css-vars.css"
 import "@/styles/index.css"