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/utils/combat-utils.ts

@@ -10,7 +10,6 @@ import { BASE_GUARDIANS } from '../data/guardian-data';
 // ─── Damage Calculation Params ──────────────────────────────────────────────
 
 export interface DamageCalcParams {
-  skills: Record<string, number>;
   signedPacts: number[];
 }
 
@@ -21,13 +20,11 @@ export interface InsightCalcParams {
   totalManaGathered: number;
   signedPacts: number[];
   prestigeUpgrades: Record<string, number>;
-  skills: Record<string, number>;
 }
 
 // ─── DPS Calculation Params ─────────────────────────────────────────────────
 
 export interface DPSCalcParams {
-  skills: Record<string, number>;
   signedPacts: number[];
   equippedInstances: Record<string, string | null>;
   equipmentInstances: Record<string, EquipmentInstance>;
@@ -150,24 +147,21 @@ export function calcDamage(
 ): number {
   const sp = SPELLS_DEF[spellId];
   if (!sp) return 5;
-  const skills = state.skills;
 
-  // Base damage: spell base + skill bonus + discipline bonus
+  // Base damage: spell base + discipline bonus
   const discBaseDmg = discipline?.bonuses?.baseDamageBonus || 0;
-  const baseDmg = sp.dmg + (skills.combatTrain || 0) * 5 + discBaseDmg;
+  const baseDmg = sp.dmg + discBaseDmg;
 
   // Percentage multiplier
   const discDmgMult = discipline?.bonuses?.baseDamageMultiplier || 0;
-  const pct = 1 + (skills.arcaneFury || 0) * 0.1 + discDmgMult;
+  const pct = 1 + discDmgMult;
 
   // Elemental mastery bonus
-  const elemMasteryBonus = 1 + (skills.elementalMastery || 0) * 0.15;
+  const elemMasteryBonus = 1;
 
   // Guardian bane bonus
   const isGuardianFloor = floorElem && Object.values(BASE_GUARDIANS).some(g => g.element === floorElem);
-  const guardianBonus = isGuardianFloor
-    ? 1 + (skills.guardianBane || 0) * 0.2
-    : 1;
+  const guardianBonus = 1;
 
   // Get boon bonuses from pacts
   const boons = getBoonBonuses(state.signedPacts);
@@ -177,7 +171,7 @@ export function calcDamage(
   const elemDamageMult = 1 + boons.elementalDamage / 100;
 
   // Apply crit chance and damage from boons
-  const critChance = (skills.precision || 0) * 0.05 + boons.critChance / 100;
+  const critChance = boons.critChance / 100;
   const critDamageMult = 1.5 + boons.critDamage / 100;
 
   let damage = baseDmg * pct * elemMasteryBonus * guardianBonus * rawDamageMult * elemDamageMult;
@@ -200,7 +194,7 @@ export function calcDamage(
 export function calcInsight(state: InsightCalcParams, discipline?: DisciplineBonuses): number {
   const pu = state.prestigeUpgrades;
   const discInsightBonus = discipline?.bonuses?.insightGainBonus || 0;
-  const skillBonus = 1 + (state.skills.insightHarvest || 0) * 0.1 + discInsightBonus;
+  const skillBonus = 1 + discInsightBonus;
 
   // Get boon bonuses for insight gain
   const boons = getBoonBonuses(state.signedPacts);
@@ -323,7 +317,7 @@ export function getTotalDPS(
 
     // Get cast speed (spells per second)
     const baseCastTime = spellDef.baseCastTime || 1.0;
-    const castingSpeedBonus = 1 + (state.skills.castingSpeed || 0) * 0.1;
+    const castingSpeedBonus = 1;
     const equipmentAttackSpeed = upgradeEffects.attackSpeedMultiplier || 1;
     const castTime = baseCastTime / (castingSpeedBonus * equipmentAttackSpeed);