- Added - Full integration of pet level-up tracking using `PET_BATTLE_LEVEL_CHANGED`, `PET_JOURNAL_LIST_UPDATE`, and `BAG_UPDATE_DELAYED` for Retail - [core.lua]
- Added - New sound trigger for pet level-up based on `UNIT_PET_EXPERIENCE` event - [core.lua]
- Updated - Improved logic to track pet levels in the journal and play level-up sounds accordingly - [core.lua]
- Updated - Refined pet level-up sound triggers for both in-battle and out-of-battle scenarios - [core.lua]
- Fixed - Pet level-up detection when using items like battle pet charms in the journal - [core.lua]
- Fixed - Corrected spelling of "level" in various localization strings - [localization.lua]