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/data/golems/utils.ts

@@ -1,7 +1,15 @@
 // ─── Golem Helper Functions ─────────────────────────
 
 import type { GolemDef, GolemManaCost } from './types';
-import { GOLEMS_DEF } from './index';
+import { BASE_GOLEMS } from './base-golems';
+import { ELEMENTAL_GOLEMS } from './elemental-golems';
+import { HYBRID_GOLEMS } from './hybrid-golems';
+
+const GOLEMS_DEF = {
+  ...BASE_GOLEMS,
+  ...ELEMENTAL_GOLEMS,
+  ...HYBRID_GOLEMS,
+};
 
 // Get golem slots based on Fabricator attunement level
 // Level 2 = 1, Level 4 = 2, Level 6 = 3, Level 8 = 4, Level 10 = 5