Shalu Sound Alerts

- Fixed charge abilities (e.g. multi-charge cooldowns) announcing 2-3 times in a row when a charge finished, especially after a loading screen.
- Post-announce frame rebuilding now only happens when another charge is genuinely recharging; zero-span duration objects returned at full charges no longer re-arm the cooldown frame and self-trigger duplicate alerts.
- Fixed false "ready" alerts after loading screens/zone-in: cooldown frames are now built from real-time spell state, and frame completion is re-verified before announcing.
- Charge-ready detection now requires charge count and recharge duration to agree, preventing premature alerts during client resync.
- Fixed the pre-load snapshot being cleared too early, which could make later calibration passes build erroneous frames.
- In combat, protected ("secret") API values safely fall back to previous behavior, so no legitimate alerts are missed.