Dusk UnitFrames

Fixes

• Fixed animated 3D portraits constantly flashing/resetting during normal play (health/aura updates were re-triggering the model reset far more often than needed)
• Fixed target/focus/boss frames misbehaving due to unreliable secret-value reporting on WoW Forever — resolved both false "Unknown/Offline" ghost frames and real targets failing to display
• Fixed Boss frames (#1-5) not showing on encounter engage until target/focus/roster happened to change afterward
• Fixed a crash when an aura's data came back as a protected/secret value
• Fixed 3D portraits going blank for units with a protected identity; added a static 2D fallback
• Fixed example frames (Boss/Arena/Battleground/etc.) flashing away almost instantly while unlocking frames in the settings panel — they now stay visible the whole time you're in mover mode
• Fixed the options panel triggering a "script ran too long" error if opened for the first time mid-combat — it now pre-loads shortly after login instead
• Added a periodic self-healing visibility check as a backstop against this client's inconsistent event/signal timing