web: more ipad accommodations and clean up

- moved all user agent toggles to (legacy) frontend, like it should have always been
- removed unnecessary building

src/modules/pageRender/findRendered.js

@@ -1,11 +1,6 @@
 import { languageList } from "../../localization/manager.js";
 
-export default function(lang, userAgent) {
+export default function(lang) {
     let language = languageList.includes(lang) ? lang : "en";
-
-    let ua = userAgent.toLowerCase();
-    let platform = (ua.match("android") || ua.match("iphone os")) ? "mob" : "pc";
-    if (platform === "mob" && ua.match("iphone os")) platform = "ios";
-
-    return `/build/${platform}/${language}.html`;
+    return `/build/${language}.html`;
 }