fix: login flash, album name casing, lrclib duration mismatch

- Android: show nothing while DataStore loads credentials (null initial
  value) to prevent login screen flash on startup when already logged in
- Web: dispAlbumName now only uses sortName as romaji for Japanese titles;
  English albums with lowercase ALBUMSORT tags now display correct casing
- lrclib: add no-duration fallback exact match to find songs where local
  file duration differs from lrclib entry (e.g. Sanctuary Opening 5:58 vs 4:24)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/api.js

@@ -201,7 +201,8 @@ export function dispAlbumName(album) {
   const ov = getRomajiOverrides();
   if (name && ov[name]) return ov[name];
   const sort = album?.sortName;
-  if (sort && !_isJp(sort)) return sort;
+  // Only use sortName as romaji when the album title itself is Japanese — otherwise sortName is just a sort key (e.g. lowercase "ultra blue")
+  if (sort && _isJp(name) && !_isJp(sort)) return sort;
   return name;
 }