docs(changelog): attribute 1.48.1 entries, fix spacing; refresh WHATS_NEW

CHANGELOG [1.48.1]: add missing blank line between the Opus seek-crash entry
and the next heading, and add "By @Psychotoxical" attribution (no PR number)
to the six entries that were committed directly to the hotfix branch (playback
freeze, macOS headphone restart, Discord cover art, minimize-to-tray, and the
two Windows media-controls fixes from issue #1102).

WHATS_NEW [1.48.1]: rewrite the section to reflect the full user-visible 1.48.1
changelog per the What's New rules — themed Fixed groups (Playback and audio;
Offline, Now Playing, and Navidrome; Themes and integrations; Other), ordered
by user impact, without author/PR/issue references.

CHANGELOG.md

@@ -15,11 +15,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Playback freeze on track changes
 
+**By [@Psychotoxical](https://github.com/Psychotoxical)**
+
 * Changing tracks — skipping, or the automatic advance at the end of a song — could freeze the interface for several seconds while audio kept playing (the progress bar and lyrics stopped updating). The queue header recomputed its duration totals on every track change instead of only when the queue itself changes; it now recomputes only on queue changes, so track changes stay instant.
 * This also resolves output-device changes not being applied on Windows: the same freeze was blocking playback from following the newly selected device.
 
 ### Paused or stopped playback restarting on headphone disconnect (macOS)
 
+**By [@Psychotoxical](https://github.com/Psychotoxical)**
+
 * On macOS, pausing or stopping playback and then disconnecting headphones (or otherwise switching the audio output device) could make playback restart on the newly selected device. Playback now reliably stays paused or stopped across a device change.
 
 ### Crash when seeking Opus/Ogg files
@@ -28,12 +32,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Scrubbing the seekbar on an Opus/Ogg file — and then pressing Stop — crashed the whole app (a 1.48 regression from the Symphonia 0.6 migration). The Ogg demuxer recorded its seek bounds only when the source was seekable during the format probe, but probing hid seekability, so the first seek panicked on the audio thread (`Option::unwrap()` on `None`) and took the process down at the audio backend boundary.
 * Local and in-memory Opus/Ogg sources now stay seekable through the probe, so seeking works correctly. As a safety net, any decoder panic during a seek is contained instead of crashing the app; for Opus/Ogg streamed over HTTP, seeking is a no-op for now rather than a crash.
+
 ### Discord Rich Presence cover art missing with two server addresses
 
+**By [@Psychotoxical](https://github.com/Psychotoxical)**
+
 * When a server profile had both a local and a public address, Discord Rich Presence showed the placeholder icon instead of the album cover. The cover URL used the local address, which Discord's servers can't reach; it now uses the public address (the same one used for share links).
 
 ### "Minimize to Tray" ignored on the macOS close button
 
+**By [@Psychotoxical](https://github.com/Psychotoxical)**
+
 * On macOS, closing the window with the red close button always quit the app, even with "Minimize to Tray" enabled. The close button now respects the setting — with it on, the window hides to the tray instead of quitting, the same as the tray icon's "Hide".
 
 ### Library sync stalling for many seconds on large Navidrome collections
@@ -45,10 +54,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Album cover missing in Windows media controls
 
+**By [@Psychotoxical](https://github.com/Psychotoxical)**
+
 * On Windows, the system media controls (the Quick Settings media tile, the lock screen and third-party media flyouts) showed the track title and artist but no album cover. Windows could not decode the cached WebP cover art for its thumbnail, even with the Store WebP extension installed. The cover is now converted to PNG before it is handed to the media controls, so the artwork shows again. macOS and Linux are unaffected.
 
 ### Windows media controls showed "Unknown application"
 
+**By [@Psychotoxical](https://github.com/Psychotoxical)**
+
 * On Windows, the system media controls (the Quick Settings media tile, the lock screen and third-party media flyouts) labelled playback as "Unknown application" with no icon. The app now registers an explicit application identity at startup so Windows shows "Psysonic" and its icon as the playback source.
 
 

WHATS_NEW.md

@@ -11,7 +11,24 @@ Within each section, order by **user impact** (most noticeable first) — not PR
 
 ## Fixed
 
-- Fixed an issue with Opus playback where seeking the seekbar could crash the app.
+### Playback and audio
+
+- Changing tracks — skipping, or the automatic advance at the end of a song — no longer freezes the interface for a few seconds: the progress bar and lyrics keep updating, and on **Windows** a change of output device now takes effect right away.
+- Seeking an **Opus/Ogg** track — and then pressing **Stop** — no longer crashes the app.
+- **macOS:** pausing or stopping playback and then unplugging headphones (or switching the output device) no longer makes playback restart — it stays paused or stopped.
+
+### Offline, Now Playing, and Navidrome
+
+- On large **Navidrome** libraries, background library sync no longer locks up database writes for minutes at a time, so play history, ratings, and other saves go through without long delays.
+
+### Themes and integrations
+
+- **Discord** Rich Presence shows the album cover again when a server profile has both a local and a public address.
+
+### Other
+
+- **Windows:** the system media controls (Quick Settings media tile, lock screen, and third-party flyouts) now show the album cover and display **Psysonic** with its icon instead of "Unknown application".
+- **macOS:** closing the window with the red close button now respects **Minimize to Tray** — with it on, the window hides to the tray instead of quitting.
 
 ## [1.48.0]