test(verify-play): gate 9 asserts session loss lands on bnet_login with the reason

tools/verify-play.ts

@@ -17,7 +17,7 @@
  *   Gate 7. Dockable Packet Inspector live packet capture, filtering, row selection, and all 4 `.d2cap` fixtures
  *           replay with 0 `UnknownS2c` events
  *   Gate 8. Server host validation (`bare_ip_on_https` rejection) & `localStorage` (`d2web.settings.v1`) persistence across `Page.reload`
- *   Gate 9. Graceful disconnect recovery to Battle.net lobby overlay with disconnect reason banner, 0 console/page errors.
+ *   Gate 9. Session loss returns to the Battle.net login screen with the reason (loginError + banner), 0 console/page errors.
  */
 
 import { spawn } from 'node:child_process'
@@ -1017,12 +1017,14 @@ async function main(): Promise<void> {
       throw new Error(`Gate 8b failed: ${JSON.stringify(gate8b)}`)
     }
 
-    // ─── Gate 9: Graceful Disconnect Recovery to Battle.net Lobby Overlay ──
+    // ─── Gate 9: Session Loss Returns to the Battle.net Login Screen With Reason ──
     const gate9 = await cdp.evaluate<{
       phase: string
       reason: string | null
       overlayVisible: boolean
       bannerVisible: boolean
+      stage: string
+      loginError: string | null
     }>(`(async () => {
       const app = window.__d2Play;
       await app.simulateDisconnect('Test disconnect: connection reset by peer');
@@ -1033,6 +1035,8 @@ async function main(): Promise<void> {
         reason: app.session.disconnectReason,
         overlayVisible: overlay ? overlay.style.display !== 'none' : false,
         bannerVisible: banner ? !banner.hidden : false,
+        stage: app.flowState.stage,
+        loginError: app.flowState.loginError,
       };
     })()`)
     console.log('[verify-play] Gate 9 (Graceful disconnect recovery):', gate9)
@@ -1040,7 +1044,9 @@ async function main(): Promise<void> {
       gate9.phase !== 'disconnected' ||
       !gate9.reason?.includes('Test disconnect') ||
       !gate9.overlayVisible ||
-      !gate9.bannerVisible
+      !gate9.bannerVisible ||
+      gate9.stage !== 'bnet_login' ||
+      !gate9.loginError?.includes('Test disconnect')
     ) {
       throw new Error(`Gate 9 failed: ${JSON.stringify(gate9)}`)
     }