fix incorrect balance push notification

apps/econ/vitest.config.ts

@@ -14,6 +14,12 @@ export default defineConfig({
 				// isolated test, so provide a minimal stub exposing the same NotificationsHub
 				// RPC surface — enough for the runtime to start and for notification sends to
 				// no-op.
+				//
+				// The stub RECORDS what it was sent (`drainFrames`) rather than discarding it.
+				// Pushes are best-effort and swallow their own errors, so a frame carrying the
+				// wrong payload is otherwise invisible here — which is exactly how
+				// StorefrontBalanceUpdate shipped with the resulting total in a field the
+				// client adds to what it is already showing.
 				workers: [
 					{
 						name: 'notify',
@@ -24,8 +30,18 @@ export default defineConfig({
 						script: `
 							import { DurableObject } from 'cloudflare:workers'
 							export class NotificationsHub extends DurableObject {
-								async notifyPlayer() { return { delivered: 0, queued: true } }
+								frames = []
+								async notifyPlayer(accountId, notificationType, payload) {
+									this.frames.push({ accountId, notificationType, payload })
+									return { delivered: 0, queued: true }
+								}
 								async broadcast() { return { delivered: 0 } }
+								/** Everything pushed since the last call, then forget it. */
+								async drainFrames() {
+									const drained = this.frames
+									this.frames = []
+									return drained
+								}
 							}
 							export default { fetch() { return new Response('ok') } }
 						`,