refactor: remove GUARDIANS constant, consolidate into guardian-data.ts

- Delete src/lib/game/constants/guardians.ts (the old static GUARDIANS constant)
- Create src/lib/game/data/guardian-data.ts with BASE_GUARDIANS (same data, new home)
- Remove GUARDIANS export from constants/index.ts
- Update all 11 files that imported GUARDIANS to use getGuardianForFloor() or BASE_GUARDIANS:
  - useGameDerived.ts, combat-actions.ts, gameStore.ts, prestigeStore.ts
  - combat-utils.ts, room-utils.ts, floor-utils.ts, spire-utils.ts
  - SpireCombatPage.tsx, SpireHeader.tsx
- Update 4 test files to use getGuardianForFloor() instead of GUARDIANS constant
- guardian-encounters.ts now imports BASE_GUARDIANS from guardian-data.ts
- Split room-utils.test.ts (505 lines) into room-utils.test.ts + room-utils-floor-state.test.ts

src/lib/game/utils/combat-utils.ts

@@ -2,8 +2,10 @@
 
 import type { SpellCost, EquipmentInstance } from '../types';
 import type { DisciplineBonuses } from './mana-utils';
-import { GUARDIANS, SPELLS_DEF, ELEMENT_OPPOSITES, INCURSION_START_DAY, MAX_DAY } from '../constants';
+import { SPELLS_DEF, ELEMENT_OPPOSITES, INCURSION_START_DAY, MAX_DAY } from '../constants';
 import { ENCHANTMENT_EFFECTS } from '../data/enchantment-effects';
+import { getGuardianForFloor } from '../data/guardian-encounters';
+import { BASE_GUARDIANS } from '../data/guardian-data';
 
 // ─── Damage Calculation Params ──────────────────────────────────────────────
 
@@ -86,7 +88,7 @@ export function getBoonBonuses(signedPacts: number[]): BoonBonuses {
   };
 
   for (const floor of signedPacts) {
-    const guardian = GUARDIANS[floor];
+    const guardian = getGuardianForFloor(floor);
     if (!guardian) continue;
 
     for (const boon of guardian.boons) {
@@ -158,7 +160,7 @@ export function calcDamage(
   const elemMasteryBonus = 1 + (skills.elementalMastery || 0) * 0.15;
 
   // Guardian bane bonus
-  const isGuardianFloor = floorElem && Object.values(GUARDIANS).some(g => g.element === floorElem);
+  const isGuardianFloor = floorElem && Object.values(BASE_GUARDIANS).some(g => g.element === floorElem);
   const guardianBonus = isGuardianFloor
     ? 1 + (skills.guardianBane || 0) * 0.2
     : 1;

src/lib/game/utils/floor-utils.ts

@@ -1,9 +1,11 @@
 // ─── Floor Helpers ────────────────────────────────────────────────────────────
 
-import { GUARDIANS, FLOOR_ELEM_CYCLE } from '../constants';
+import { FLOOR_ELEM_CYCLE } from '../constants';
+import { getGuardianForFloor } from '../data/guardian-encounters';
 
 export function getFloorMaxHP(floor: number): number {
-  if (GUARDIANS[floor]) return GUARDIANS[floor].hp;
+  const guardian = getGuardianForFloor(floor);
+  if (guardian) return guardian.hp;
   // Improved scaling: slower early game, faster late game
   const baseHP = 100;
   const floorScaling = floor * 50;

src/lib/game/utils/room-utils.ts

@@ -2,7 +2,8 @@
 // Moved from store-modules/room-utils.ts to eliminate legacy dependencies
 
 import type { RoomType, FloorState, EnemyState } from '../types';
-import { GUARDIANS, FLOOR_ELEM_CYCLE, PUZZLE_ROOMS, PUZZLE_ROOM_INTERVAL, PUZZLE_ROOM_CHANCE, SWARM_ROOM_CHANCE, SPEED_ROOM_CHANCE, FLOOR_ARMOR_CONFIG, SWARM_CONFIG, SPEED_ROOM_CONFIG } from '../constants';
+import { FLOOR_ELEM_CYCLE, PUZZLE_ROOMS, PUZZLE_ROOM_INTERVAL, PUZZLE_ROOM_CHANCE, SWARM_ROOM_CHANCE, SPEED_ROOM_CHANCE, FLOOR_ARMOR_CONFIG, SWARM_CONFIG, SPEED_ROOM_CONFIG } from '../constants';
+import { getGuardianForFloor } from '../data/guardian-encounters';
 import { getFloorMaxHP } from './floor-utils';
 import { getFloorElement } from './floor-utils';
 import { getEnemyName, generateSwarmEnemies } from './enemy-utils';
@@ -10,7 +11,7 @@ import { getEnemyName, generateSwarmEnemies } from './enemy-utils';
 // Generate room type for a floor
 export function generateRoomType(floor: number): RoomType {
   // Guardian floors are always guardian type
-  if (GUARDIANS[floor]) {
+  if (getGuardianForFloor(floor)) {
     return 'guardian';
   }
   
@@ -35,8 +36,9 @@ export function generateRoomType(floor: number): RoomType {
 
 // Get armor for a non-guardian floor
 export function getFloorArmor(floor: number): number {
-  if (GUARDIANS[floor]) {
-    return GUARDIANS[floor].armor || 0;
+  const guardian = getGuardianForFloor(floor);
+  if (guardian) {
+    return guardian.armor || 0;
   }
   
   // Armor becomes more common on higher floors
@@ -84,10 +86,11 @@ export function generateFloorState(floor: number): FloorState {
   const roomType = generateRoomType(floor);
   const element = getFloorElement(floor);
   const baseHP = getFloorMaxHP(floor);
-  const guardian = GUARDIANS[floor];
+  const guardian = getGuardianForFloor(floor);
   
   switch (roomType) {
     case 'guardian':
+      if (!guardian) return { roomType: 'combat', enemies: [] };
       return {
         roomType: 'guardian',
         enemies: [{

src/lib/game/utils/spire-utils.ts

@@ -2,10 +2,10 @@
 // Spire-specific utility functions for room generation, enemy stat scaling, etc.
 
 import type { RoomType, FloorState, EnemyState } from '../types';
-import { GUARDIANS, FLOOR_ELEM_CYCLE, PUZZLE_ROOMS } from '../constants';
+import { FLOOR_ELEM_CYCLE, PUZZLE_ROOMS } from '../constants';
 import { getFloorMaxHP, getFloorElement } from './floor-utils';
 import { getEnemyName } from './enemy-utils';
-import { isGuardianFloor, getExtendedGuardian } from '../data/guardian-encounters';
+import { getGuardianForFloor, isGuardianFloor } from '../data/guardian-encounters';
 
 // ─── Spire Room Configuration ─────────────────────────────────────────────────
 
@@ -85,7 +85,7 @@ export function generateSpireFloorState(floor: number, roomIndex: number, totalR
 
   switch (roomType) {
     case 'guardian': {
-      const guardian = GUARDIANS[floor] || getExtendedGuardian(floor);
+      const guardian = getGuardianForFloor(floor);
       if (guardian) {
         return {
           roomType: 'guardian',