refactor: split bloated state types into State + Actions interfaces (issue #102)

- CombatState: split into CombatState (data) + CombatActions + CombatStore
- PrestigeState: split into PrestigeState (data) + PrestigeActions + PrestigeStore
- ManaState: split into ManaState (data) + ManaActions + ManaStore
- GameState: deprecated, removed from barrel exports
- crafting-actions: updated to use CraftingState instead of GameState
- combat-utils/mana-utils: replaced Pick<GameState,...> with focused interfaces
- DisciplineCardProps: split into Definition + Runtime + Callbacks
- stores/index.ts: now exports both State and Actions types

src/lib/game/crafting-actions/computed-getters.ts

@@ -1,9 +1,9 @@
 // ─── Computed Getters ──────────────────────────────────────────────────────
 
-import type { GameState } from '../types';
+import type { CraftingState } from '../stores/craftingStore.types';
 import { ENCHANTMENT_EFFECTS } from '../data/enchantment-effects';
 
-export function getEquipmentSpells(get: () => GameState): string[] {
+export function getEquipmentSpells(get: () => CraftingState): string[] {
   const state = get();
   const spells: string[] = [];
 
@@ -23,7 +23,7 @@ export function getEquipmentSpells(get: () => GameState): string[] {
   return [...new Set(spells)];
 }
 
-export function getEquipmentEffects(get: () => GameState): Record<string, number> {
+export function getEquipmentEffects(get: () => CraftingState): Record<string, number> {
   const state = get();
   const effects: Record<string, number> = {};
 
@@ -47,7 +47,7 @@ export function getEquipmentEffects(get: () => GameState): Record<string, number
 
 export function getAvailableCapacity(
   instanceId: string,
-  get: () => GameState
+  get: () => CraftingState
 ): number {
   const state = get();
   const instance = state.equipmentInstances[instanceId];