feat(skills): implement Thunder Storm, Energy Shield, and Lightning Mastery with 1.13c parity (closes #211, closes #212, closes #217)
- Thunder Storm (57):
* Authentic 1.13c duration: 800 + (slvl - 1) * 200 frames (Param1=800, Param2=200).
* Hyperbolic cadence decay: Math.max(25, 125 - Math.floor((110 * slvl) / (slvl + 6))) frames.
* Range: 17 subtiles = 340px (Param7=17).
* 5-band piecewise lightning damage (1-100 base, +10/+10/+11 across bands).
* Authentic missile 'thunderstorm1' (ID 166, CelFile 'LightningboltBig', animLen 8) and cast overlay 'light_cast_2'.
* Zero synergies in 1.13c; multiplicative scaling with Lightning Mastery.
- Energy Shield (58):
* Authentic duration: 3600 + (slvl - 1) * 1500 frames (Param1=3600, Param2=1500).
* 1.13c piecewise absorb percentage: 20% lvl 1, +5% lvl 2-8, +2% lvl 9-16, +1% lvl 17+, strictly hard capped at 95% (slvl 40).
* Telekinesis hard synergy ratio: (32 - Math.min(20, Math.max(0, tkBlvl))) / 16 (2.0 down to 0.75). Hard points only (blvl); soft points ignored.
* Absorbs raw incoming damage BEFORE player resistances are applied. Remainder mitigated by player resistances.
* Poison (elemType === 'pois' || isPoison) and Open Wounds strictly bypass ES directly to HP.
* Mana depletion drains mana to 0, collapses shield, and spills unabsorbed damage to HP.
* Overlays: 'energyshield' looping body overlay and 'energyshieldhit0' directional hit overlay.
- Lightning Mastery (63):
* Passive formula: 50 + (slvl - 1) * 12 percent (+50% at lvl 1, +62% at lvl 2, +158% at lvl 10, +278% at lvl 20, +518% at lvl 40).
* Multiplicative scaling with synergies across all 5 lightning skills (Charged Bolt, Lightning, Chain Lightning, Nova, Thunder Storm): Final = Math.floor(Base * (1 + Syn/100) * (1 + Mastery/100)).
* StatList accrued stat 'passive_ltng_mastery' integration and combat pipeline executeSUnitDmg support.
- 7-Dimensional Vitest Suites:
* Full 7-D coverage for skill-057-thunder-storm.test.ts (15 tests passing).
* Full 7-D coverage for skill-058-energy-shield.test.ts (15 tests passing).
* Full 7-D coverage for skill-063-lightning-mastery.test.ts (17 tests passing).
* Invariants: BATCH1_SKILLS length strictly 38, zero runtime MPQ queries.
* Full repo test suite passing (414 test files, 4213 tests passing, 0 errors).
troytt
a0567c2473