Notification sound added. Docs updated.

config/sound/default/README.md

@@ -4,9 +4,9 @@ These 28 WAVs are derived from Python Fenrir's `config/sound/default` at commit
 `c018f5fd294068febe0efb7961b06f87b834c4e8`:
 https://git.stormux.org/storm/fenrir
 
-Python Fenrir identifies its license as LGPL v3. Original sound names and
-content are retained; this copy changes gain, limits peaks, and encodes 24-bit
-PCM. Normalized for Fenrir in 2026.
+Python Fenrir identifies its license as LGPL v3. Original sound content is
+retained. `Announce.wav` is renamed to `notification.wav` for notification
+alerts. This copy changes gain, limits peaks, and encodes 24-bit PCM. Normalized for Fenrir in 2026.
 
 The target is -21.67 LUFS, about 8.89 dB below the original pack's median.
 This includes a further 10% reduction in perceived loudness (-1.52 dB) after

config/sound/default/normalization.json

@@ -15,7 +15,8 @@
       "gain_db": -13.42
     },
     {
-      "file": "Announce.wav",
+      "file": "notification.wav",
+      "source_file": "Announce.wav",
       "source_sha256": "021a66d00793de36e21f8905b8bbc3653b765c81e432c02cf588690e10533072",
       "before_lufs": -15.11,
       "after_lufs": -21.65,

config/sound/default/soundicons.toml

@@ -19,3 +19,4 @@ copy_to_clipboard = "CopyToClipboard.wav"
 paste_clipboard = "PasteClipboardOnScreen.wav"
 has_attributes = "has_attribute.wav"
 misspelled = "mispell.wav"
+notification = "notification.wav"