fix: resolve 7 circular dependency chains in src/lib/game

- equipment/utils.ts: import directly from individual equipment modules instead of index.ts
- golems/utils.ts: import directly from individual golem modules instead of index.ts
- combatStore.ts: extract CombatState to combat-state.types.ts, remove debugSetTime (was only user of gameStore import)
- combat-actions.ts: import CombatState from combat-state.types.ts instead of combatStore
- stores/index.ts: re-export CombatState from combat-state.types.ts
- GameStateDebug.tsx: replace debugSetTime calls with direct useGameStore.setState()

Verification: bunx madge --circular src/lib/game → No circular dependency found!

src/lib/game/stores/combatStore.ts

@@ -10,113 +10,7 @@ import { useGameStore } from './gameStore';
 import { generateFloorState } from '../utils/room-utils';
 import { addActivityLogEntry } from '../utils/activity-log';
 import { processCombatTick, makeInitialSpells } from './combat-actions';
-
-export interface CombatState {
-  // Floor state
-  currentFloor: number;
-  floorHP: number;
-  floorMaxHP: number;
-  maxFloorReached: number;
-
-  // Action state
-  activeSpell: string;
-  currentAction: GameAction;
-  castProgress: number;
-
-  // Spire mode
-  spireMode: boolean;
-
-  // Room system for special floors
-  currentRoom: FloorState;
-
-  // Spire climbing state
-  clearedFloors: Record<number, boolean>;
-  climbDirection: 'up' | 'down' | null;
-  isDescending: boolean;
-
-  // Golemancy (summoned golems)
-  golemancy: GolemancyState;
-
-  // Equipment spell states for multi-casting
-  equipmentSpellStates: EquipmentSpellState[];
-
-  // Combat special effect tracking
-  comboHitCount: number;
-  floorHitCount: number;
-
-  // Spells
-  spells: Record<string, SpellState>;
-
-  // Activity Log (for Spire Mode UI)
-  activityLog: ActivityLogEntry[];
-
-  // Achievements
-  achievements: AchievementState;
-
-  // Stats tracking
-  totalSpellsCast: number;
-  totalDamageDealt: number;
-  totalCraftsCompleted: number;
-
-  // Actions
-  setCurrentFloor: (floor: number) => void;
-  advanceFloor: () => void;
-  setFloorHP: (hp: number) => void;
-  setMaxFloorReached: (floor: number) => void;
-
-  setAction: (action: GameAction) => void;
-  setSpell: (spellId: string) => void;
-  setCastProgress: (progress: number) => void;
-
-  // Room state
-  setCurrentRoom: (room: FloorState) => void;
-
-  // Spire climbing
-  setClimbDirection: (direction: 'up' | 'down' | null) => void;
-  setClearedFloor: (floor: number, cleared: boolean) => void;
-  setIsDescending: (descending: boolean) => void;
-  climbDownFloor: () => void;
-  exitSpireMode: () => void;
-  startClimbUp: () => void;
-  startClimbDown: () => void;
-
-  // Golemancy
-  toggleGolem: (golemId: string) => void;
-  setEnabledGolems: (golemIds: string[]) => void;
-
-  // Spells
-  learnSpell: (spellId: string) => void;
-  setSpellState: (spellId: string, state: Partial<SpellState>) => void;
-
-  // Activity Log
-  addActivityLog: (eventType: ActivityEventType, message: string, details?: ActivityLogEntry['details']) => void;
-
-  // Stats
-  incrementSpellsCast: () => void;
-  addDamageDealt: (damage: number) => void;
-  incrementCraftsCompleted: () => void;
-
-  // Spire mode
-  enterSpireMode: () => void;
-
-  // Combat tick
-  processCombatTick: (
-    rawMana: number,
-    elements: Record<string, { current: number; max: number; unlocked: boolean }>,
-    maxMana: number,
-    attackSpeedMult: number,
-    onFloorCleared: (floor: number, wasGuardian: boolean) => void,
-    onDamageDealt: (damage: number) => { rawMana: number; elements: Record<string, { current: number; max: number; unlocked: boolean }> },
-  ) => { rawMana: number; elements: Record<string, { current: number; max: number; unlocked: boolean }>; logMessages: string[]; totalManaGathered: number };
-
-  // Reset
-  resetCombat: (startFloor: number, spellsToKeep?: string[]) => void;
-
-  // Debug helpers
-  debugSetFloor: (floor: number) => void;
-  resetFloorHP: () => void;
-  debugSetTime: (day: number, hour: number) => void;
-}
+import type { CombatState } from './combat-state.types';
 
 export const useCombatStore = create<CombatState>()(
   persist(