feat: add per-element mana regen disciplines for all 14 mana types

- Create data/disciplines/elemental-regen.ts (base + utility elements)
- Create data/disciplines/elemental-regen-advanced.ts (composite + exotic)
- Wire into ALL_DISCIPLINES via index.ts and discipline-slice.ts
- Add perElementRegenBonus to ComputedEffects type
- Merge regen_{element} discipline bonuses in computeAllEffects()
- Apply per-element regen to element mana each tick in gameStore
- Add 'Elemental Regen' and 'Advanced Regen' tabs to DisciplinesTab UI

src/lib/game/effects.ts

@@ -94,6 +94,15 @@ export function computeAllEffects(
     }
   }
 
+  // Merge per-element regen from discipline effects (regen_{element})
+  const perElementRegenBonus: Record<string, number> = { ...upgradeEffects.perElementRegenBonus };
+  for (const [key, value] of Object.entries(disciplineEffects.bonuses)) {
+    if (key.startsWith('regen_') && key !== 'regenBonus') {
+      const element = key.replace('regen_', '');
+      perElementRegenBonus[element] = (perElementRegenBonus[element] || 0) + value;
+    }
+  }
+
   const merged: UnifiedEffects = {
     ...upgradeEffects,
     maxManaBonus: upgradeEffects.maxManaBonus + (equipmentEffects.bonuses.maxMana || 0) + (disciplineEffects.bonuses.maxManaBonus || 0),
@@ -102,6 +111,7 @@ export function computeAllEffects(
     baseDamageBonus: upgradeEffects.baseDamageBonus + (equipmentEffects.bonuses.baseDamage || 0) + (disciplineEffects.bonuses.baseDamageBonus || 0),
     elementCapBonus: upgradeEffects.elementCapBonus + (equipmentEffects.bonuses.elementCap || 0) + (disciplineEffects.bonuses.elementCapBonus || 0),
     perElementCapBonus,
+    perElementRegenBonus,
     maxManaMultiplier: upgradeEffects.maxManaMultiplier * (equipmentEffects.multipliers.maxMana || 1),
     regenMultiplier: upgradeEffects.regenMultiplier * (equipmentEffects.multipliers.regen || 1),
     clickManaMultiplier: upgradeEffects.clickManaMultiplier * (equipmentEffects.multipliers.clickMana || 1),