refactor: remove memory slot system and Memories section from PrestigeTab

- Remove deepMemory prestige upgrade from constants/prestige.ts
- Remove Memory interface from types.ts
- Remove memorySlots, memories, addMemory, removeMemory, clearMemories from prestigeStore.ts
- Remove deepMemory/memory references from gameLoopActions.ts
- Remove MemoriesCard component and its usage from PrestigeTab.tsx
- Remove memorySlots display from LoopStatsSection.tsx
- Update tests: store-actions-combat-prestige.test.ts, PrestigeTab.test.ts, tick-integration.test.ts

The memory slot system was fully wired but had no gameplay mechanic — addMemory()
was never called outside tests. This removes dead code across 9 files.

src/lib/game/__tests__/store-actions-combat-prestige.test.ts

@@ -38,9 +38,7 @@ function resetPrestigeStore() {
     totalInsight: 500,
     loopInsight: 0,
     prestigeUpgrades: {},
-    memorySlots: 3,
     pactSlots: 1,
-    memories: [],
     defeatedGuardians: [],
     signedPacts: [],
     signedPactDetails: {},
@@ -211,46 +209,6 @@ describe('PrestigeStore', () => {
       }
     });
 
-    it('should increase memorySlots with deepMemory', () => {
-      usePrestigeStore.setState({ insight: 2000 });
-      const before = usePrestigeStore.getState().memorySlots;
-      const deepResult = usePrestigeStore.getState().doPrestige('deepMemory');
-      expect(deepResult.success).toBe(true);
-      expect(usePrestigeStore.getState().memorySlots).toBe(before + 1);
-    });
-  });
-
-  describe('addMemory / removeMemory', () => {
-    it('should add a memory when slots available', () => {
-      usePrestigeStore.getState().addMemory({ skillId: 'manaFlow', level: 3, tier: 1, upgrades: [] });
-      expect(usePrestigeStore.getState().memories.length).toBe(1);
-    });
-
-    it('should not add duplicate memory', () => {
-      usePrestigeStore.getState().addMemory({ skillId: 'manaFlow', level: 3, tier: 1, upgrades: [] });
-      usePrestigeStore.getState().addMemory({ skillId: 'manaFlow', level: 5, tier: 1, upgrades: [] });
-      expect(usePrestigeStore.getState().memories.length).toBe(1);
-    });
-
-    it('should not exceed memory slots', () => {
-      usePrestigeStore.setState({ memorySlots: 1 });
-      usePrestigeStore.getState().addMemory({ skillId: 'manaFlow', level: 1, tier: 1, upgrades: [] });
-      usePrestigeStore.getState().addMemory({ skillId: 'manaSpring', level: 1, tier: 1, upgrades: [] });
-      expect(usePrestigeStore.getState().memories.length).toBe(1);
-    });
-
-    it('should remove memory by skillId', () => {
-      usePrestigeStore.getState().addMemory({ skillId: 'manaFlow', level: 3, tier: 1, upgrades: [] });
-      usePrestigeStore.getState().removeMemory('manaFlow');
-      expect(usePrestigeStore.getState().memories.length).toBe(0);
-    });
-
-    it('should clear all memories', () => {
-      usePrestigeStore.getState().addMemory({ skillId: 'manaFlow', level: 1, tier: 1, upgrades: [] });
-      usePrestigeStore.getState().addMemory({ skillId: 'manaSpring', level: 1, tier: 1, upgrades: [] });
-      usePrestigeStore.getState().clearMemories();
-      expect(usePrestigeStore.getState().memories.length).toBe(0);
-    });
   });
 
   describe('defeatGuardian / signedPacts', () => {
@@ -362,10 +320,10 @@ describe('PrestigeStore', () => {
 
   describe('resetPrestigeForNewLoop', () => {
     it('should preserve insight and upgrades, reset loop state', () => {
-      usePrestigeStore.getState().resetPrestigeForNewLoop(200, { manaWell: 2 }, [], 4);
+      usePrestigeStore.getState().resetPrestigeForNewLoop(200, { manaWell: 2 });
       expect(usePrestigeStore.getState().insight).toBe(200);
       expect(usePrestigeStore.getState().prestigeUpgrades).toEqual({ manaWell: 2 });
-      expect(usePrestigeStore.getState().memorySlots).toBe(4);
+
       expect(usePrestigeStore.getState().defeatedGuardians).toEqual([]);
     });
   });