feat(core,web): player queue, play events and web player controller (M3, wip)

- core: PlayQueue with shuffle and repeat, PlayAttempt counting only
  time actually played, EventBuffer with batching and backoff, uuidv7
- web: Player over HTMLAudioElement with Media Session, preload of the
  next track, expired-link refresh, local and server playback state,
  hotkeys; PlayerProvider is not wired into the shell yet
- ru/en strings and icons for the player and Collection

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/i18n/locales/en/common.json

@@ -25,7 +25,11 @@
     "users": "Users",
     "audit": "Audit log",
     "library": "Library",
-    "sources": "Storage"
+    "sources": "Storage",
+    "collection": "Collection",
+    "history": "History",
+    "likes": "Likes",
+    "dislikes": "Dislikes"
   },
   "profile": {
     "menu": "Profile menu",
@@ -43,7 +47,26 @@
     "wave_soon": "An endless stream tuned to your taste will appear once the server has a library."
   },
   "player": {
-    "empty": "Nothing is playing"
+    "empty": "Nothing is playing",
+    "label": "Player",
+    "play": "Play",
+    "pause": "Pause",
+    "next": "Next",
+    "prev": "Previous",
+    "like": "Like",
+    "unlike": "Remove from likes",
+    "dislike": "Dislike",
+    "undislike": "Remove dislike",
+    "volume": "Volume",
+    "mute": "Mute",
+    "unmute": "Unmute",
+    "shuffle": "Shuffle",
+    "repeat_off": "Repeat off",
+    "repeat_all": "Repeat queue",
+    "repeat_one": "Repeat track",
+    "progress": "Position",
+    "unavailable": "Track is unavailable — skipping",
+    "error": "Could not play the track"
   },
   "settings": {
     "title": "Settings",
@@ -117,5 +140,20 @@
     "back_home": "Back home",
     "artist": "Artist",
     "album": "Album"
+  },
+  "collection": {
+    "title": "Collection",
+    "history": "History",
+    "likes": "Likes",
+    "dislikes": "Dislikes",
+    "clear_history": "Clear history",
+    "clear_confirm": "Clear your listening history? Recommendations will still take it into account.",
+    "today": "Today",
+    "yesterday": "Yesterday",
+    "empty_history": "What you listen to will show up here",
+    "empty_likes": "Tap the heart on tracks — they will gather here",
+    "empty_dislikes": "Disliked tracks stay out of the wave. None so far",
+    "play_all": "Play all",
+    "more": "Show more"
   }
 }

packages/i18n/locales/en/errors.json

@@ -61,5 +61,10 @@
   },
   "search": {
     "unavailable": "Search is temporarily unavailable"
+  },
+  "playback": {
+    "link_invalid": "The link has expired — reload the page",
+    "track_unavailable": "Track is unavailable",
+    "transcode_failed": "Could not prepare the track"
   }
 }