fix: use iTunes country=jp globally — returns Japanese original names, identical for non-Japanese music

src/api.js

@@ -135,7 +135,7 @@ function _itunesBase() {
 
 export async function itunesSearch(query, entity='musicTrack', limit=25) {
   try {
-    const r = await fetch(`${_itunesBase()}/search?term=${encodeURIComponent(query)}&media=music&entity=${entity}&limit=${limit}&country=us&explicit=Yes`);
+    const r = await fetch(`${_itunesBase()}/search?term=${encodeURIComponent(query)}&media=music&entity=${entity}&limit=${limit}&country=jp&explicit=Yes`);
     const text = await r.text();
     if (!text) return [];
     return JSON.parse(text).results || [];