fix(cron): preserve browser tabs for persistent sessions (#113984)

Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/cron/isolated-agent/run.session-key-isolation.test.ts

@@ -187,6 +187,7 @@ describe("runCronIsolatedAgentTurn isolated session identity", () => {
     expect(runRequest.promptCacheKey).toBeUndefined();
     expect(runRequest.bootstrapContextMode).toBeUndefined();
     expect(runRequest.bootstrapContextRunKind).toBe("cron");
+    expect(cleanupBrowserSessionsForLifecycleEndMock).not.toHaveBeenCalled();
   });
 
   it.each([

src/cron/isolated-agent/run.ts

@@ -338,12 +338,15 @@ export async function runCronIsolatedAgentTurn(params: {
         });
       } finally {
         prepared.context.sessionWorkAdmission.release();
-        // Browser ownership follows the detached run identity, not the stable cron job key.
-        await cleanupBrowserSessionsForLifecycleEnd({
-          cfg: prepared.context.cfgWithAgentDefaults,
-          sessionKeys: [prepared.context.runSessionKey],
-          onWarn: (message) => logWarn(`[cron:${params.job.id}] ${message}`),
-        });
+        // Only run-scoped browser identities end with this invocation.
+        // Persistent cron targets keep the session and its tracked tabs alive.
+        if (prepared.context.runSessionKey !== prepared.context.agentSessionKey) {
+          await cleanupBrowserSessionsForLifecycleEnd({
+            cfg: prepared.context.cfgWithAgentDefaults,
+            sessionKeys: [prepared.context.runSessionKey],
+            onWarn: (message) => logWarn(`[cron:${params.job.id}] ${message}`),
+          });
+        }
       }
     }
   }