fix(golemancy): reconcile spec vs code discrepancies (issue #326)

- D-SLOT-01: Verified slot cap of 7 matches spec §2.2 (no change needed)
- D-COMB-03: Implement AoE damage distribution for Sand/Shadowglass frames
- D-COMB-01: Reconcile armor pierce formula to spire-combat spec §9.4 (dmg × (1 + armorPierce))
- D-CIRC-01: Fix Simple Logic Circuit summon cost from raw to earth mana
- D-ENCHANT-03: Add dual_attunement unlockRequirement to all golem enchantments
- D-CORE-01/02: Add Guardian Core runtime override mechanism for guardian-specific mana

Also increased test timeouts for module import tests that timeout in full suite runs.

src/lib/game/stores/golem-combat-helpers.test.ts

@@ -50,39 +50,42 @@ describe('computeBasicAttackDamage', () => {
   });
 
   it('combines elemental bonus and armor pierce', () => {
-    // Water vs Fire = 1.5x, then 50% armor with 25% pierce
-    // effectiveArmor = 0.5 * (1 - 0.25) = 0.375
-    // dmg = 10 * 1.5 * (1 - 0.375) = 9.375
+    // Water vs Fire = 1.5x, then armor pierce adds to damage multiplier
+    // dmg = 10 * 1.5 * (1 + 0.25) = 18.75
     const dmg = computeBasicAttackDamage(
       { baseDamage: 10, armorPierce: 0.25, element: 'water' },
       0, 0.5, 'fire',
     );
-    expect(dmg).toBeCloseTo(9.375, 5);
+    expect(dmg).toBeCloseTo(18.75, 5);
   });
 
-  it('fully bypasses armor when armorPierce is 1.0', () => {
+  it('doubles damage when armorPierce is 1.0', () => {
+    // dmg = 10 * (1 + 1.0) = 20
     const dmg = computeBasicAttackDamage(
       { baseDamage: 10, armorPierce: 1.0, element: undefined },
       0, 0.8, 'fire',
     );
-    expect(dmg).toBe(10);
+    expect(dmg).toBe(20);
   });
 
-  it('applies no armor bypass when armorPierce is 0', () => {
+  it('returns base damage when armorPierce is 0', () => {
+    // dmg = 10 * (1 + 0) = 10
     const dmg = computeBasicAttackDamage(
       { baseDamage: 10, armorPierce: 0, element: undefined },
       0, 0.5, 'fire',
     );
-    expect(dmg).toBe(5);
+    expect(dmg).toBe(10);
   });
 
   it('stacks enchantment armorPierce with frame armorPierce', () => {
-    const totalPierce = Math.min(1, 0.5 + 0.15);
+    // totalPierce = 0.5 + 0.15 = 0.65
+    // dmg = 20 * (1 + 0.65) = 33
+    const totalPierce = 0.5 + 0.15;
     const dmg = computeBasicAttackDamage(
       { baseDamage: 20, armorPierce: 0.5, element: undefined },
       0.15, 0.4, 'fire',
     );
-    expect(dmg).toBe(20 * (1 - 0.4 * (1 - totalPierce)));
+    expect(dmg).toBe(20 * (1 + totalPierce));
   });
 });