[api] update progression stub

apps/api/src/routes/progression.ts

@@ -524,23 +524,22 @@ export const progressionRoutes = new Hono<App>({ strict: false })
 	// The progression event running right now — the limited-time XP event the client shows
 	// a banner and a progress track for.
 	//
-	// STUB: a bare `-1`, the reference server's "no active event" value (the id of the
-	// active event, or -1 when there is none). The client reads it as "no event on" and
-	// skips the event UI entirely. That is the honest answer (nothing here runs events) and
-	// the safe one: a fabricated event would draw a track that never fills. No auth —
-	// whether an event is running is the same fact for everybody, and the client asks while
-	// loading.
+	// STUB: a bare `0` — the id of the active event, or 0 when there is none (this once
+	// served -1 for the same meaning). The client reads it as "no event on" and skips the
+	// event UI entirely. That is the honest answer (nothing here runs events) and the safe
+	// one: a fabricated event would draw a track that never fills. No auth — whether an
+	// event is running is the same fact for everybody, and the client asks while loading.
 	.get(
 		'/api/progressionEvents/active',
 		describeRoute({
 			tags: ['Progression'],
 			summary: 'Progression event currently running (stub)',
 			description:
-				'The limited-time XP event in progress, as a bare event id. Always `-1` — the ' +
+				'The limited-time XP event in progress, as a bare event id. Always `0` — the ' +
 				'“no active event” value; nothing on this server runs one — which the client reads ' +
 				'as “no event” and skips the event UI, where a 404 would stall the load. No auth: ' +
 				'it is the same answer for every player.',
-			responses: { 200: json(BareInteger, 'A bare `-1` — no event is running') },
+			responses: { 200: json(BareInteger, 'A bare `0` — no event is running') },
 		}),
-		(c) => c.json(-1)
+		(c) => c.json(0)
 	)