chore(release): 0.54.0 — R5 data integrity (finalize version + release notes)

VERSION

@@ -1 +1 @@
-0.53.1
+0.54.0

frontend/src/lib/releaseNotes.ts

@@ -14,6 +14,21 @@ export interface ReleaseEntry {
 }
 
 export const RELEASE_NOTES: ReleaseEntry[] = [
+  {
+    version: "0.54.0",
+    date: "2026-07-26",
+    summary:
+      "A sturdier player — press F to go big, arrow-key volume that's remembered — plus downloads and subscription sync that hold up when something goes wrong.",
+    features: [
+      "Player: press F to maximise the video to a full-window view, and use the ↑/↓ arrow keys to change the volume — your level is now remembered per account. Ctrl+scroll zooms the page as usual again instead of being captured by the player.",
+      "The maximised view no longer blocks YouTube's own fullscreen button or on-video controls, keyboard shortcuts keep working after you click into the video, and exiting the view returns keyboard focus to the app. Both the YouTube and the local/Plex player behave the same way.",
+    ],
+    fixes: [
+      "Downloads: fixed a class of downloads that could fail with an internal error (a produced file the downloader couldn't locate), and mp4 downloads are no longer needlessly re-encoded — they finish faster and keep their original quality.",
+      "Downloads: leftover temporary playback files from an interrupted session are now cleaned up automatically on restart, and a cancelled download stops reliably instead of hanging.",
+      "Subscription sync: a one-off empty response from YouTube can no longer wipe your subscription list; playlist sync now stops safely once a daily quota limit is hit instead of burning through the rest; and a permanently unavailable channel is reported instead of silently looking healthy.",
+    ],
+  },
   {
     version: "0.53.1",
     date: "2026-07-25",