fix(ui): restore context panel session chats

packages/ui/src/components/layout/contextPanelEmbeddedChat.test.ts

@@ -5,11 +5,13 @@ import {
   buildEmbeddedSessionChatURL,
   EMBEDDED_RUNTIME_BOOTSTRAP_REQUEST,
   EMBEDDED_RUNTIME_BOOTSTRAP_RESPONSE,
+  EMBEDDED_VISIBILITY_REQUEST,
   getOrCreateEmbeddedSessionChatURL,
   getActiveEmbeddedSessionChatTab,
   getEmbeddedSessionChatOriginSessionId,
   isEmbeddedSessionChat,
   requestEmbeddedSessionRuntimeBootstrap,
+  requestEmbeddedSessionVisibility,
   resetEmbeddedSessionChatCache,
   type EmbeddedSessionChatURLCacheEntry,
 } from './contextPanelEmbeddedChat';
@@ -171,6 +173,22 @@ describe('active embedded session chat', () => {
     expect(getActiveEmbeddedSessionChatTab(tabs, null)).toBeNull();
     expect(getActiveEmbeddedSessionChatTab(tabs, 'missing-chat')).toBeNull();
   });
+
+  test('requests authoritative visibility from the same-origin parent', () => {
+    installWindowLocation('http://127.0.0.1:5173/app?ocPanel=session-chat&sessionId=ses_1');
+    resetEmbeddedSessionChatCache();
+    const calls: Array<{ message: unknown; origin: string }> = [];
+    (window as unknown as { parent: { postMessage: (message: unknown, origin: string) => void } }).parent = {
+      postMessage: (message, origin) => calls.push({ message, origin }),
+    };
+
+    requestEmbeddedSessionVisibility();
+
+    expect(calls).toEqual([{
+      message: { type: EMBEDDED_VISIBILITY_REQUEST },
+      origin: 'http://127.0.0.1:5173',
+    }]);
+  });
 });
 
 describe('isEmbeddedSessionChat', () => {