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/components/game/tabs/PrestigeTab.test.ts

@@ -28,9 +28,9 @@ describe('Tab barrel export', () => {
 // ─── Test: Prestige upgrade definitions ────────────────────────────────────────
 
 describe('Prestige upgrade definitions', () => {
-  it('has exactly 14 prestige upgrades', async () => {
+  it('has exactly 13 prestige upgrades', async () => {
     const { PRESTIGE_DEF } = await import('@/lib/game/constants/prestige');
-    expect(Object.keys(PRESTIGE_DEF).length).toBe(14);
+    expect(Object.keys(PRESTIGE_DEF).length).toBe(13);
   });
 
   it('all upgrades have required fields', async () => {
@@ -46,7 +46,7 @@ describe('Prestige upgrade definitions', () => {
   it('all 14 expected upgrade IDs are present', async () => {
     const { PRESTIGE_DEF } = await import('@/lib/game/constants/prestige');
     const expectedIds = [
-      'manaWell', 'manaFlow', 'deepMemory', 'insightAmp', 'spireKey',
+      'manaWell', 'manaFlow', 'insightAmp', 'spireKey',
       'temporalEcho', 'steadyHand', 'ancientKnowledge', 'elementalAttune',
       'spellMemory', 'guardianPact', 'quickStart', 'elemStart',
       'unlockedManaTypeCapacity',

src/components/game/tabs/PrestigeTab.tsx

@@ -56,33 +56,6 @@ function InsightSummary({ insight, totalInsight, loopCount, loopInsight }: {
   );
 }
 
-// ─── Memories Card ────────────────────────────────────────────────────────────
-
-function MemoriesCard({ memories, memorySlots }: { memories: { skillId: string; level: number; tier: number }[]; memorySlots: number }) {
-  return (
-    <Card className="bg-gray-900/60 border-gray-700">
-      <SectionHeader title="🧠 Memories" />
-      <CardContent className="pt-0">
-        <p className="text-xs text-gray-400 mb-2">
-          Skills carried between loops. Slots: {memories.length}/{memorySlots}
-        </p>
-        {memories.length === 0 ? (
-          <p className="text-xs text-gray-500 italic">No memories stored yet.</p>
-        ) : (
-          <div className="space-y-1">
-            {memories.map((m) => (
-              <div key={m.skillId} className="text-xs text-gray-300 flex justify-between">
-                <span>{m.skillId}</span>
-                <span className="text-gray-500">Lv.{m.level} T{m.tier}</span>
-              </div>
-            ))}
-          </div>
-        )}
-      </CardContent>
-    </Card>
-  );
-}
-
 // ─── Pacts Card ───────────────────────────────────────────────────────────────
 
 function PactsCard({ signedPacts, pactSlots, defeatedGuardians }: {
@@ -177,7 +150,7 @@ function ResetLoopSection({ loopInsight, onReset }: { loopInsight: number; onRes
           <div>
             <h3 className="text-lg font-semibold text-red-400">Reset Loop</h3>
             <p className="text-xs text-gray-400 mt-1">
-              End the current loop and gain {fmt(loopInsight)} insight. Your prestige upgrades, memories, and pacts are preserved.
+              End the current loop and gain {fmt(loopInsight)} insight. Your prestige upgrades and pacts are preserved.
             </p>
           </div>
           <AlertDialog>
@@ -191,7 +164,7 @@ function ResetLoopSection({ loopInsight, onReset }: { loopInsight: number; onRes
                 <AlertDialogTitle>Reset the Loop?</AlertDialogTitle>
                 <AlertDialogDescription>
                   This will end your current loop and award you <strong className="text-amber-400">{fmt(loopInsight)} insight</strong>.
-                  Your prestige upgrades, memories, and pacts will be preserved.
+                  Your prestige upgrades and pacts will be preserved.
                   <br /><br />
                   Day, hour, mana, floor progress, and combat state will be reset.
                 </AlertDialogDescription>
@@ -221,8 +194,6 @@ export function PrestigeTab() {
     loopInsight,
     loopCount,
     prestigeUpgrades,
-    memorySlots,
-    memories,
     pactSlots,
     signedPacts,
     defeatedGuardians,
@@ -233,8 +204,6 @@ export function PrestigeTab() {
     loopInsight: s.loopInsight,
     loopCount: s.loopCount,
     prestigeUpgrades: s.prestigeUpgrades,
-    memorySlots: s.memorySlots,
-    memories: s.memories,
     pactSlots: s.pactSlots,
     signedPacts: s.signedPacts,
     defeatedGuardians: s.defeatedGuardians,
@@ -275,10 +244,7 @@ export function PrestigeTab() {
           loopInsight={loopInsight}
         />
 
-        <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
-          <MemoriesCard memories={memories} memorySlots={memorySlots} />
-          <PactsCard signedPacts={signedPacts} pactSlots={pactSlots} defeatedGuardians={defeatedGuardians} />
-        </div>
+        <PactsCard signedPacts={signedPacts} pactSlots={pactSlots} defeatedGuardians={defeatedGuardians} />
 
         <Card className="bg-gray-900/60 border-gray-700">
           <SectionHeader title="⬆️ Prestige Upgrades" />

src/components/game/tabs/StatsTab/LoopStatsSection.tsx

@@ -14,7 +14,6 @@ export function LoopStatsSection() {
   const maxFloorReached = useCombatStore((s) => s.maxFloorReached);
   const totalManaGathered = useManaStore((s) => s.totalManaGathered);
   const loopCount = usePrestigeStore((s) => s.loopCount);
-  const memorySlots = usePrestigeStore((s) => s.memorySlots);
 
   const spellsLearned = Object.values(spells || {}).filter((s: SpellState) => s.learned).length;
 
@@ -46,7 +45,7 @@ export function LoopStatsSection() {
           </div>
         </div>
         <Separator className="bg-[var(--border-subtle)] my-3" />
-        <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
+        <div className="grid grid-cols-2 md:grid-cols-3 gap-4">
           <div className="p-3 bg-[var(--bg-sunken)]/50 rounded text-center">
             <div className="text-xl font-bold text-[var(--text-secondary)] game-mono">{spellsLearned}</div>
             <div className="text-xs" style={{ color: 'var(--text-muted)' }}>Spells Learned</div>
@@ -55,10 +54,6 @@ export function LoopStatsSection() {
             <div className="text-xl font-bold text-[var(--text-secondary)] game-mono">{fmt(totalManaGathered)}</div>
             <div className="text-xs" style={{ color: 'var(--text-muted)' }}>Total Mana Gathered</div>
           </div>
-          <div className="p-3 bg-[var(--bg-sunken)]/50 rounded text-center">
-            <div className="text-xl font-bold text-[var(--text-secondary)] game-mono">{memorySlots}</div>
-            <div className="text-xs" style={{ color: 'var(--text-muted)' }}>Memory Slots</div>
-          </div>
         </div>
       </CardContent>
     </Card>