feat: track info drawer (Get Info-style)

Add a right-side track info drawer that sits to the right of the queue
panel when both are open. Shows a large cover, title/artist/album links,
a Play/Queue/Edit actions row, and Status/General/File/Identifiers
sections (empty rows omitted). Opens from the track context menu, the
player now-playing tile, and the queue now-playing card.

- ui slice: trackInfoId + open/closeTrackInfo
- TrackInfoDrawer rendered after QueuePanel in AppShell; overlays content
  on narrow viewports
- map source/createdAt/enrichedAt from the wire (were unmapped)
- formatDateTime helper, info icon, i18n (en/ru)
- drop orphaned toggleNowPlaying/isNowPlayingOpen from player slice

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/common/Icon.tsx

@@ -19,6 +19,7 @@ import {
   GearSix,
   HardDrives,
   Heart,
+  Info,
   MagnifyingGlass,
   Pause,
   Play,
@@ -69,6 +70,7 @@ const ICONS = {
   'skip-forward': SkipForward,
   repeat: Repeat,
   heart: Heart,
+  info: Info,
   'thumbs-down': ThumbsDown,
   'speaker-high': SpeakerHigh,
   'speaker-x': SpeakerSimpleX,