Simplify frontend

Just a login form and a list of applications. No modals or anything like
that.

src/browser/pages/app.ts

@@ -0,0 +1,14 @@
+import { getOptions } from "../../common/util"
+
+import "./app.css"
+import "./error.css"
+import "./global.css"
+import "./home.css"
+import "./login.css"
+
+const options = getOptions()
+const parts = window.location.pathname.replace(/^\//g, "").split("/")
+parts[parts.length - 1] = options.base
+const url = new URL(window.location.origin + "/" + parts.join("/"))
+
+console.log(url)