refactor(i18n): split locale files into per-namespace modules (Phase K) (#688)

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.

src/locales/nb/player.ts

@@ -0,0 +1,56 @@
+export const player = {
+  regionLabel: 'Musikkspiller',
+  openFullscreen: 'Åpne fullskjermsspiller',
+  fullscreen: 'Fullskjermsspiller',
+  closeFullscreen: 'Lukk fullskjerm',
+  closeTooltip: 'Lukk (Esc)',
+  noTitle: 'Ingen tittel',
+  stop: 'Stopp',
+  prev: 'Forrige spor',
+  play: 'Spill av',
+  pause: 'Pause',
+  previewActive: 'Forhåndsvisning spilles av',
+  previewLabel: 'Forhåndsvisning',
+  delayModalTitle: 'Tidsur',
+  delayPauseSection: 'Pause etter',
+  delayStartSection: 'Start etter',
+  delayPreviewPause: 'Pause kl.',
+  delayPreviewStart: 'Start kl.',
+  delaySchedulePause: 'Planlegg pause',
+  delayScheduleStart: 'Planlegg start',
+  delayCancelPause: 'Avbryt pause-timer',
+  delayCancelStart: 'Avbryt start-timer',
+  delayInactivePause: 'Kun tilgjengelig under avspilling.',
+  delayInactiveStart: 'Kun i pause med spor eller radio lastet.',
+  delayCustomMinutes: 'Egen forsinkelse (minutter)',
+  delayCustomPlaceholder: 'f.eks. 2,5',
+  closeDelayModal: 'Lukk',
+  delayIn: 'om',
+  delayFmtSec: '{{n}} s',
+  delayFmtMin: '{{n}} min',
+  delayFmtHr: '{{n}} t',
+  delayCancel: 'Avbryt',
+  delayApply: 'Bruk',
+  next: 'Neste spor',
+  repeat: 'Gjenta',
+  repeatOff: 'Av',
+  repeatAll: 'Alle',
+  repeatOne: 'Én',
+  progress: 'Sangfremdrift',
+  volume: 'Volum',
+  toggleQueue: 'Veksle kø',
+  collapseQueueResize: 'Skjul kø, endre bredde',
+  moreOptions: 'Flere alternativer',
+  equalizer: 'Equalizer',
+  miniPlayer: 'Minispiller',
+  lyrics: 'Sangtekst',
+  fsLyricsToggle: 'Sangtekst i fullskjerm',
+  lyricsLoading: 'Laster sangtekst…',
+  lyricsNotFound: 'Ingen sangtekst funnet for dette sporet',
+  lyricsSourceServer: 'Kilde: Server',
+  lyricsSourceLrclib: 'Kilde: LRCLIB',
+  lyricsSourceNetease: 'Kilde: Netease',
+  lyricsSourceLyricsplus: 'Kilde: YouLyPlus',
+  showDuration: 'Vis varighet',
+  showRemainingTime: 'Vis gjenværende tid',
+};