Implement share-link detection in search (track, queue, album, artist,
composer): enqueue tracks/queues without interrupting playback; preview
album/artist/composer without switching the active server; queue preview
modal with scrollable track list. Based on community PR #551.
Co-authored-by: Daniel Wagner <daniel.iuser@icloud.com>
Each src/locales/<lang>.ts (~1800 LOC) becomes a folder src/locales/<lang>/
with one module per i18n namespace (44 each) plus an index.ts barrel that
reassembles <lang>Translation in the original key order.
Mechanical, script-driven split with a JSON round-trip check: every
locale object is byte-identical to its pre-split form. i18n.ts is
unchanged — './locales/<lang>' now resolves to the folder index.
The per-namespace settings.ts files land ~440-460 LOC; a single i18n
namespace is the natural, non-arbitrary split unit for a flat string
table, so they are intentionally left whole.