feat(RECIPE-0009): complete iteration 0 — deduplication, notifications, UI improvements

src/tests/queue-manager.spec.ts

@@ -353,4 +353,28 @@ describe('QueueManager', () => {
 			expect(callback3).toHaveBeenCalled();
 		});
 	});
+
+	describe('deduplication', () => {
+		it('should return existing item when enqueueing duplicate URL', () => {
+			const url = 'https://instagram.com/p/ABC123';
+			const firstItem = queueManager.enqueue(url);
+			const secondItem = queueManager.enqueue(url);
+
+			expect(secondItem.id).toBe(firstItem.id);
+			expect(queueManager.getAll()).toHaveLength(1);
+		});
+
+		it('should find item by URL', () => {
+			const url = 'https://instagram.com/p/TEST123';
+			const item = queueManager.enqueue(url);
+
+			const found = queueManager.findByUrl(url);
+			expect(found?.id).toBe(item.id);
+		});
+
+		it('should return undefined when URL not found', () => {
+			const found = queueManager.findByUrl('https://instagram.com/p/NOTFOUND');
+			expect(found).toBeUndefined();
+		});
+	});
 });