docs(release-notes): drop the false iOS background-audio claim from 0.57.0/0.57.2

frontend/src/lib/releaseNotes.ts

@@ -48,7 +48,7 @@ export const RELEASE_NOTES: ReleaseEntry[] = [
     version: "0.57.2",
     date: "2026-07-28",
     chores: [
-      "Sharing: the shared-video page now advertises playback to the OS via the Media Session API only, dropping a Web Audio workaround that interfered with the browser's own background playback on iOS (it left the audio to be suspended when the tab was backgrounded, the opposite of the goal) — so background audio is left to the browser's native handling, the way it works for youtube.com.",
+      "Sharing: the shared-video page no longer routes audio through a Web Audio workaround — it interfered with the browser's own media handling on iOS (suspending the audio when the tab was backgrounded, the opposite of the goal). Playback is still advertised to the OS via the Media Session API as before.",
     ],
   },
   {
@@ -62,12 +62,11 @@ export const RELEASE_NOTES: ReleaseEntry[] = [
     version: "0.57.0",
     date: "2026-07-28",
     summary:
-      "Downloads and channels polish — clearer download failures, a friendlier share flow, richer channel controls, and background audio for shared videos on iPhone/iPad.",
+      "Downloads and channels polish — clearer download failures, a friendlier share flow, and richer channel controls.",
     features: [
       "Downloads: the page now opens on the Queue tab, the library shows when each item was downloaded, the Share dialog opens with a ready-to-copy link already created (all the other link options stay available), and you can paste a link from the clipboard with one tap.",
       "Downloads: a failed item now explains WHY in a readable message — video unavailable, sign-in required, region-blocked, no downloadable format, and so on — with the raw technical detail one click away and a Retry offered when the failure looks temporary.",
       "Channels: a channel's page now shows how many of its videos are stored versus its true total, with a “Full history” button to pull the rest. The priority arrows repeat (and speed up) while held instead of one click at a time, the value sits where the cursor can't cover it, and you can click the number to type any priority directly — negatives included.",
-      "Sharing: a shared video keeps playing audio in the background on iPhone/iPad (like YouTube) when you leave the browser.",
     ],
     fixes: [
       "Downloads: thumbnails that had gone missing (when the original video was deleted or its link expired) now fall back to the saved poster instead of showing a broken image.",