Drive the cast bar from cast lifecycle events instead of polling C_Spell
every frame. OnUpdate now only animates a stamped start/end and fades out;
all state transitions come from events:
- player: vanilla SPELLCAST_START / _STOP / _FAILED / _INTERRUPTED /
_CHANNEL_START / _CHANNEL_STOP, plus nampower SPELL_START_SELF (the only
signal for a chained same-spell recast, which never runs the client cast
path) and SPELL_DELAYED_SELF for pushback (applied from its delayMs arg).
- non-player (target/focus): nampower SPELL_START_OTHER / SPELL_FAILED_OTHER
+ PLAYER_TARGET_CHANGED / PLAYER_FOCUS_CHANGED.
Data comes from ClassicAPI's C_Spell.UnitCastingInfo / UnitChannelInfo
(player exact; other units from the SMSG_SPELL_START cache). SPELL_START_*
re-polls are deferred one frame so ClassicAPI's packet co-hook has stamped
before the read. SPELLCAST_CHANNEL_STOP only clears when a channel is shown,
so a lagged channel-stop doesn't wipe a following cast's bar.
Remove the now-unused CASTBAR_EVENT_* constants from compat/vanilla.lua.
Brues
822c873132