fix: spire combat 11 high-severity discrepancies (issue #333)

D-01: Implement per-weapon cast progress (weaponCastProgress record)
D-04: Bypass Executioner/Berserker discipline specials for golem attacks
D-09: Fix lightning counter direction (lightning→water, not lightning→earth)
D-10: Add full composite element counters (blackflame/radiantflames ↔ frost/water/light/dark)
D-15: Fix Executioner to check per-enemy HP < 25% instead of floorHP ratio
D-20: Fix dodge formula to match spec (min(0.55, floor × 0.003), starts at 0)
D-22: Fix shield modifier to use flat HP pool instead of percentage barrier
D-23: Wire up applyMageBarrierRecharge in the damage pipeline
D-25: Move guardian regen from per-damage-event to once-per-tick
D-26: Add guardian armor reduction to the guardian defensive pipeline
D-31: Fix armor_corrode to be temporary (restore armor on effect expiry)
D-38: Implement AoE damage distribution across enemies

All 1069 tests pass. No files exceed 400 lines.

src/lib/game/utils/combat-utils.ts

@@ -33,19 +33,20 @@ export interface DPSCalcParams {
 }
 
 // ─── Elemental Damage Bonus ──────────────────────────────────────────────────
-
-// Elemental damage bonus: +50% if spell element opposes floor element (super effective)
+// +50% if spell element opposes floor element (super effective)
 // -25% if spell element matches its own opposite (weak)
 export function getElementalBonus(spellElem: string, floorElem: string): number {
   if (spellElem === 'raw') return 1.0; // Raw mana has no elemental bonus
 
   if (spellElem === floorElem) return 1.25; // Same element: +25% damage
 
-  // Check for super effective first: spell is the opposite of floor
-  if (ELEMENT_OPPOSITES[floorElem] === spellElem) return 1.5; // Super effective: +50% damage
+  // Check for super effective: spellElem is in floorElem's opposites list
+  const floorOpposites = ELEMENT_OPPOSITES[floorElem];
+  if (floorOpposites && floorOpposites.includes(spellElem)) return 1.5; // Super effective: +50% damage
 
-  // Check for weak: spell's opposite matches floor
-  if (ELEMENT_OPPOSITES[spellElem] === floorElem) return 0.75; // Weak: -25% damage
+  // Check for weak: floorElem is in spellElem's opposites list
+  const spellOpposites = ELEMENT_OPPOSITES[spellElem];
+  if (spellOpposites && spellOpposites.includes(floorElem)) return 0.75; // Weak: -25% damage
 
   return 1.0; // Neutral
 }

src/lib/game/utils/enemy-generator.ts

@@ -23,7 +23,7 @@ const MODIFIER_CONFIG = {
     barrierRechargeRate: 0.05, // Recharges 5% of max HP per tick
   },
   shield: {
-    shieldAmount: 0.15, // 15% of max HP as one-time shield
+    shieldAmount: 0.15, // 15% of max HP as one-time flat shield pool (spec §5.1)
   },
   armored: {
     armorPerFloor: 0.003,
@@ -37,8 +37,8 @@ const MODIFIER_CONFIG = {
     armorPerFloor: 0.002,
   },
   agile: {
-    baseDodge: 0.20,
-    dodgePerFloor: 0.004,
+    baseDodge: 0,
+    dodgePerFloor: 0.003,
     maxDodge: 0.55,
   },
 };
@@ -126,10 +126,11 @@ export function generateEnemy(floor: number, modifiers?: EnemyModifier[]): Gener
   }
 
   if (activeModifiers.includes('shield')) {
-    barrier = Math.max(barrier, MODIFIER_CONFIG.shield.shieldAmount);
     name = `${name} (Shielded)`;
   }
 
+  const shieldPool = activeModifiers.includes('shield') ? hp * MODIFIER_CONFIG.shield.shieldAmount : 0;
+
   return {
     id: 'enemy',
     name,
@@ -138,7 +139,10 @@ export function generateEnemy(floor: number, modifiers?: EnemyModifier[]): Gener
     armor,
     dodgeChance,
     barrier,
+    shieldPool,
     element,
+    activeEffects: [],
+    effectiveArmor: armor,
     modifiers: activeModifiers,
   };
 }
@@ -172,6 +176,8 @@ export function generateSwarm(floor: number, modifiers?: EnemyModifier[]): Gener
         : 0,
       barrier: 0,
       element,
+      activeEffects: [],
+      effectiveArmor: armor,
       modifiers: activeModifiers,
     });
   }