[api] update progression stub

apps/api/src/test/integration/api.test.ts

@@ -2066,12 +2066,12 @@ describe('public endpoints', () => {
 		expect(res.status).toBe(400)
 	})
 
-	test('GET /api/progressionEvents/active is a bare -1 (no auth)', async () => {
-		// -1 is the reference server's "no active event" value; the client reads it as "no event
-		// running" and skips the event UI. A 404 would stall its load instead.
+	test('GET /api/progressionEvents/active is a bare 0 (no auth)', async () => {
+		// 0 is the "no active event" value; the client reads it as "no event running" and
+		// skips the event UI. A 404 would stall its load instead.
 		const res = await exports.default.fetch(`${ORIGIN}/api/progressionEvents/active`)
 		expect(res.status).toBe(200)
-		expect(await res.json()).toBe(-1)
+		expect(await res.json()).toBe(0)
 	})
 
 	test('GET /api/rooms/v1/filters returns an object with filter arrays', async () => {