fix: repair persistence - safe-persist getItem now returns parsed objects, fix resetGame localStorage keys

- safe-persist.ts: getItem now calls JSON.parse(str) so Zustand receives {state, version} envelope
- gameActions.ts: fix 5 wrong localStorage keys in createResetGame (mana→mana-storage, etc.)
- Add persistence.test.ts with 12 tests covering round-trip, key verification, and reset
- All 918 tests pass with zero regressions

src/lib/game/stores/gameActions.ts

@@ -6,17 +6,24 @@ import { useManaStore } from './manaStore';
 import { useCombatStore } from './combatStore';
 import { computeDisciplineEffects } from '../effects/discipline-effects';
 
+// Exact localStorage keys matching each store's persist config `name`
+const ALL_STORE_KEYS = [
+  'mana-loop-game-storage',
+  'mana-loop-mana',
+  'mana-loop-combat',
+  'mana-loop-prestige',
+  'mana-loop-crafting',
+  'mana-loop-attunements',
+  'mana-loop-discipline-store',
+  'mana-loop-ui-storage',
+] as const;
+
 export const createResetGame = (set: (state: Partial<GameCoordinatorState>) => void, initialState: GameCoordinatorState) => () => {
-  // Clear all persisted state
+  // Clear all persisted state — must use exact keys from each store's persist config
   if (typeof window !== 'undefined') {
-    localStorage.removeItem('mana-loop-ui-storage');
-    localStorage.removeItem('mana-loop-prestige-storage');
-    localStorage.removeItem('mana-loop-mana-storage');
-    localStorage.removeItem('mana-loop-combat-storage');
-    localStorage.removeItem('mana-loop-game-storage');
-    localStorage.removeItem('mana-loop-crafting-storage');
-    localStorage.removeItem('mana-loop-attunement-storage');
-    localStorage.removeItem('mana-loop-discipline-store');
+    for (const key of ALL_STORE_KEYS) {
+      localStorage.removeItem(key);
+    }
   }
 
   const startFloor = 1;