fix(test): mettre à jour entitlements.test.ts — BASIC a chat=10 (pas FEATURE_NOT_AVAILABLE)

Le test 'should return FEATURE_NOT_AVAILABLE for BASIC user requesting chat'
était décalé par rapport à la config actuelle où BASIC a 10 crédits chat/mois.
Remplacement par deux tests reflétant la réalité:
- BASIC sous la limite (5/10) → allowed=true, limit=10
- BASIC à la limite (10/10) → allowed=false, reason=QUOTA_EXCEEDED

memento-note/tests/unit/entitlements.test.ts

@@ -130,13 +130,24 @@ describe('entitlements', () => {
       expect(result.limit).toBe(30);
     });
 
-    it('should return FEATURE_NOT_AVAILABLE for BASIC user requesting chat', async () => {
+    it('should allow BASIC user to use chat when under limit (10)', async () => {
       mockActiveSubscription('BASIC');
+      vi.mocked(redis.get).mockResolvedValue('5');
+
+      const result = await canUseFeature('user1', 'chat');
+
+      expect(result.allowed).toBe(true);
+      expect(result.limit).toBe(10);
+    });
+
+    it('should deny BASIC user when chat quota is exhausted', async () => {
+      mockActiveSubscription('BASIC');
+      vi.mocked(redis.get).mockResolvedValue('10');
 
       const result = await canUseFeature('user1', 'chat');
 
       expect(result.allowed).toBe(false);
-      expect(result.reason).toBe('FEATURE_NOT_AVAILABLE');
+      expect(result.reason).toBe('QUOTA_EXCEEDED');
     });
 
     it('should fail-open when Redis is down', async () => {