feat(skills): implement Assassin Martial Arts tree with 1.13c parity (Milestone M27)
- Implement ChargeOrbManager for 1..3 tier charge accumulation, 375-frame (15.0s) duration, timeout expiration, duration refresh, and multi-skill coexistence.
- Implement resolveFinisherDischarge for full discharge on finisher contact (Tiger Strike ED%, Cobra Strike life/mana steal, Claws of Thunder cumulative elemental tiers, Phoenix Strike single tier payload).
- Implement Dragon Talon multi-kicks (1 + floor(slvl/6)) and AR scaling.
- Implement Dragon Claw dual-claw check, 2 strikes, and Claw Mastery synergy.
- Implement Dragon Tail physical-to-fire conversion (50 + 10*(slvl-1)%), 6 subtiles AOE, and knockback.
- Implement Dragon Flight teleport kick, NextDelay = 4 frames, and ED% scaling.
- Add adv-ass-martial-stress.test.ts verifying all 7 adversarial test categories (16 tests passed).
- All 10 Martial Arts unit tests (#254, #255, #259, #260, #265, #269, #270, #274, #275, #280) and typecheck pass.
troytt
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