fix(test): correct stale section name in notification-service batched test

Test 7 asserted navigation.section === "orgchart", but commit 36bed1b
renamed the section to "agents" when deleting the orgchart view. The
production code emits "agents"; only the test was stale.

tests/unit/notification-service.test.ts

@@ -209,7 +209,7 @@ describe("notification-service", () => {
       (args: unknown[]) => (args[0] as { type?: string })?.type === "notification-click",
     );
     expect(emitCall).toBeDefined();
-    expect(emitCall![0].section).toBe("orgchart");
+    expect(emitCall![0].section).toBe("agents");
     expect(emitCall![0].entityId).toBeUndefined();
   });