refactor: eliminate as any type casts across 18 source files

- Fix computeDisciplineEffects() to not require GameState parameter
- Fix getUnifiedEffects() to accept proper partial state type
- Replace upgradeEffects as any with proper UnifiedEffects type
- Replace explicit : any annotations with proper types (ComputedEffects, DesignProgress, SpellDef, etc.)
- Fix activity-log.ts eventType casting
- Fix crafting-design.ts computedEffects and designProgress types
- Fix page.tsx grimoire spell rendering with proper SpellDef property names
- Fix StatsTab ManaStatsSection with proper ManaStatsEffects interface
- Remove unused imports (useDisciplineStore from page.tsx, LeftPanel.tsx)

Remaining: 1 as any in craftingStore.ts (pre-existing CraftingStore/GameState architectural mismatch)

src/lib/game/stores/combat-actions.ts

@@ -38,7 +38,7 @@ export function processCombatTick(
   }
 
   // Compute discipline bonuses once per tick
-  const disciplineEffects = computeDisciplineEffects(useDisciplineStore.getState() as any);
+  const disciplineEffects = computeDisciplineEffects();
 
   // Calculate cast speed (no skill bonus)
   const totalAttackSpeed = attackSpeedMult;