refactor: remove skill system leftovers, migrate click mana to discipline perk

- Simplified getMeditationBonus() to continuous ramp formula
- Added click-mana capped perk to Mana Circulation discipline
- Removed manaWell/manaFlow/manaSpring skill reads and prestige upgrades
- Removed all skill fields from GameState and GameActionType
- Updated all call sites and tests (916 tests passing)

Closes #174

src/lib/game/stores/gameStore.ts

@@ -105,12 +105,12 @@ export const useGameStore = create<GameCoordinatorStore>()(
           const effects = { specials: allSpecials } as ComputedEffects;
 
           const maxMana = computeMaxMana(
-            { skills: {}, prestigeUpgrades: ctx.prestige.prestigeUpgrades, skillUpgrades: {}, skillTiers: {} },
+            { prestigeUpgrades: ctx.prestige.prestigeUpgrades },
             undefined,
             disciplineEffects,
           );
           const baseRegen = computeRegen(
-            { skills: {}, prestigeUpgrades: ctx.prestige.prestigeUpgrades, skillUpgrades: {}, skillTiers: {}, attunements: {} },
+            { prestigeUpgrades: ctx.prestige.prestigeUpgrades, attunements: {} },
             undefined,
             disciplineEffects,
           ) * (1 + (disciplineEffects.multipliers.regenMultiplier || 0));
@@ -129,7 +129,6 @@ export const useGameStore = create<GameCoordinatorStore>()(
             totalManaGathered: ctx.mana.totalManaGathered,
             signedPacts: ctx.prestige.signedPacts,
             prestigeUpgrades: ctx.prestige.prestigeUpgrades,
-            skills: {} as Record<string, number>,
           };
 
           // Check for loop end
@@ -163,7 +162,7 @@ export const useGameStore = create<GameCoordinatorStore>()(
 
           if (ctx.combat.currentAction === 'meditate') {
             meditateTicks++;
-            meditationMultiplier = getMeditationBonus(meditateTicks, {}, 1, disciplineEffects.meditationCapBonus);
+            meditationMultiplier = getMeditationBonus(meditateTicks, 1, disciplineEffects.meditationCapBonus);
           } else {
             meditateTicks = 0;
           }