fix: make discipline perk numerical bonuses functional via structured BonusSpec

- Add PerkBonus type and optional bonus field to DisciplinePerk
- Populate bonus data on 39 perks across base, elemental, elemental-regen,
  elemental-regen-advanced, and invoker discipline files
- Rewrite computeDisciplineEffects() to apply once/infinite/capped perk bonuses
  through known stat keys (maxManaBonus, baseDamageBonus, regen_*, elementCap_*)
- Add per-element cap bonus routing in effects.ts computeAllEffects()
- Remove dead enchantPower bonus (no consumer in effects pipeline)

src/lib/game/data/disciplines/elemental-regen.ts

@@ -31,6 +31,7 @@ function makeBaseRegen(id: string, name: string, manaType: string, cost: number)
         threshold: 100,
         value: 0,
         description: `+${BASE_REGEN} ${name} Regen/tick`,
+        bonus: { stat: `regen_${shortId}`, amount: BASE_REGEN },
       },
       {
         id: `${id}-inf`,
@@ -38,6 +39,7 @@ function makeBaseRegen(id: string, name: string, manaType: string, cost: number)
         threshold: 300,
         value: 100,
         description: `Every 100 XP: +0.25 ${name} Regen/tick`,
+        bonus: { stat: `regen_${shortId}`, amount: 0.25 },
       },
     ],
   };
@@ -73,6 +75,7 @@ export const elementalRegenDisciplines: DisciplineDefinition[] = [
         threshold: 100,
         value: 0,
         description: '+0.4 Transference Regen/tick',
+        bonus: { stat: 'regen_transference', amount: 0.4 },
       },
       {
         id: 'regen-transference-inf',
@@ -80,6 +83,7 @@ export const elementalRegenDisciplines: DisciplineDefinition[] = [
         threshold: 300,
         value: 100,
         description: 'Every 100 XP: +0.2 Transference Regen/tick',
+        bonus: { stat: 'regen_transference', amount: 0.2 },
       },
     ],
   },