BattleMender: Pvp Nameplates

BattleMender 17.72

Audio Alerts
- Reworked the Audio Browser with deterministic card sorting: Friendly alerts first, then Enemy alerts, with healer, player/role, and class-specific alerts grouped together.
- Renamed the first alert identity field to "Affected Unit".
- Added global Audio Settings for where alerts play instead of configuring environment per alert.
- Improved Audio Browser toolbar layout, native-style icons, hover tooltips, pressed states, and active states.
- Added updated Defensive, External, Immune, Healer, Specific Aura, and Danger browser artwork.
- Renamed "Blizzard Important (curated)" to "Danger" for consistency with Enemy Plates.
- Danger audio remains a curated native spell-ID trigger; it does not directly mirror the visual Enemy Plates Danger filter.

Healer CC reliability
- Improved native healer CC audio registration stability in arenas.
- Canonicalized grouped healer registrations onto one stable roster token to avoid duplicate/transient nameplate registrations.
- Added safe fallbacks around restricted unit identity comparisons.
- Added optional Audio Debug diagnostics for troubleshooting missed healer CC alerts. Debug capture is disabled by default.

Interface
- Reduced the default options-window width so the Audio Browser naturally opens around three columns.
- Added right-aligned Audio Browser toolbar controls and clearer tooltips.
- Alert-card delete/trash control now uses a red destructive-action treatment.

Testing
- Arena diagnostics showed stable healer CC registrations at 137 with no native registration failures in the latest test dump.