fix: resolve priority 4 issues — discipline mutation, skill→discipline migration, uiStore persistence, game loop interval, toast listener leak, page re-renders

- Issue 70: Fix discipline-slice.ts nested element mutation (use immutable spread)
- Issue 71: Add persist middleware to uiStore for paused/gameOver/victory
- Issue 72: Wire discipline effects into calcDamage (spell-casting, void-manipulation)
- Issue 73: Fix useGameLoop interval recreation (use getState() + empty deps)
- Issue 74: Fix use-toast.ts listener leak (change [state] dep to [])
- Issue 75: Reduce page.tsx re-renders with useShallow for multi-field subscriptions
- Issue 76: Fix createGatherMana hardcoded click mana (use computeClickMana with discipline effects)
- Issue 77: Pass discipline effects to computeMaxMana/computeRegen/calcInsight in tick()
- Export DisciplineBonuses type and useDisciplineStore from barrel exports
- Update tests to match new function signatures

src/app/components/LeftPanel.tsx

@@ -9,7 +9,8 @@ import { ActionButtons } from '@/components/game';
 import { AttunementStatus } from '@/components/game/AttunementStatus';
 import { ActivityLogPanel } from '@/components/game/ActivityLogPanel';
 import { DebugName } from '@/components/game/debug/debug-context';
-import { useGameStore, useManaStore, useCombatStore, useCraftingStore, usePrestigeStore } from '@/lib/game/stores';
+import { useGameStore, useManaStore, useCombatStore, useCraftingStore, usePrestigeStore, useDisciplineStore } from '@/lib/game/stores';
+import { computeDisciplineEffects } from '@/lib/game/effects/discipline-effects';
 import { getUnifiedEffects } from '@/lib/game/effects';
 import { getMeditationBonus, getIncursionStrength } from '@/lib/game/stores';
 import { computeTotalMaxMana, computeTotalRegen, computeTotalClickMana } from '@/lib/game/effects';
@@ -56,7 +57,7 @@ export function LeftPanel() {
   const maxMana = computeTotalMaxMana({ skills: {}, prestigeUpgrades, skillUpgrades: {}, skillTiers: {}, equippedInstances, equipmentInstances }, upgradeEffects);
   const baseRegen = computeTotalRegen({ skills: {}, prestigeUpgrades, skillUpgrades: {}, skillTiers: {}, equippedInstances, equipmentInstances }, upgradeEffects);
   const clickMana = computeTotalClickMana({ skills: {}, skillUpgrades: {}, skillTiers: {}, equippedInstances, equipmentInstances }, upgradeEffects);
-  const meditationMultiplier = getMeditationBonus(meditateTicks, {}, upgradeEffects.meditationEfficiency);
+  const meditationMultiplier = getMeditationBonus(meditateTicks, {}, (upgradeEffects as any).meditationEfficiency);
   const incursionStrength = getIncursionStrength(useGameStore((s) => s.day), useGameStore((s) => s.hour));
   const effectiveRegen = baseRegen * (1 - incursionStrength) * meditationMultiplier;