Add desktop notifications for track changes, queue end, and errors

Uses notify-rust to send D-Bus desktop notifications from the daemon
when tracks change, the queue empties, or audio errors occur.

1 files changed, 8 insertions, 2 deletions

diff --git a/TODO.md b/TODO.md
index 945f244..95d775c 100644
--- a/TODO.md
+++ b/TODO.md
@@ -54,10 +54,16 @@
 
 - [x] **Fix queue/play bugs** - `rsp play <file>` no longer interrupts playback when something is already playing; directory `play -n`/`play -i` now inserts in correct order; removed dead duplicate shuffle handler; queue display no longer shows `(playing)` when playback is stopped.
 
+- [x] **Systemd service unit** - Create systemd service file for auto-start.
+
+- [x] **Desktop notifications** - Send notifications on track change, queue end, and errors via `notify-rust`.
+
 ## Remaining Work
 
-- [ ] **Persist queue state** - Save queue to disk so it survives daemon restarts.
+- [ ] **Persist queue state** - Save queue to disk so it survives daemon restarts. (optional)
 
 - [ ] **Scrobbling (Last.fm/ListenBrainz)** - Add scrobbling support via configured credentials.
 
-- [ ] **Systemd service unit** - Create systemd service file for auto-start.
\ No newline at end of file
+- [ ] **Shuffle first song** - First song is not being shuffled due to currently played track not being shuffled.
+
+- [ ] **In album shuffle** - Shuffle songs within albums, don't mix albums together (only applies to shuffle: album).