ui: default to sub (jpn) instead of dub for playback

static/app.js

@@ -6,7 +6,7 @@ const BASE = (() => {
   return p.endsWith("/") ? p : p.slice(0, p.lastIndexOf("/") + 1);
 })();
 const main = document.getElementById("main");
-let hls = null, detail = null, lang = "eng", seasonId = null;
+let hls = null, detail = null, lang = "jpn", seasonId = null;
 
 async function api(path) {
   const r = await fetch(BASE + path.replace(/^\//, ""));
@@ -190,7 +190,7 @@ function initRecent() {
 async function showAnime(slug_id, opts = {}) {
   skel();
   detail = await api(`/api/anime/${slug_id}`);
-  lang = opts.lang || "eng";
+  lang = opts.lang || "jpn";
   seasonId = opts.season || detail.id;
   detail.slug_id = slug_id;
   main.innerHTML = "";
@@ -528,7 +528,7 @@ function showPlayOverlay(v) {
     else if (p.get("anime")) await showAnime(p.get("anime"), {
       season: p.get("season") ? +p.get("season") : null,
       ep: p.get("ep") ? +p.get("ep") : null,
-      lang: p.get("lang") || "eng",
+      lang: p.get("lang") || "jpn",
     });
     else if (p.has("history")) await showHistory();
     else showHome();